Efecto del tratamiento con ácido zoledrónico e hidroxocobalamina sobre la microarquitectura ósea en ratones con periodontitis y osteoporosis inducida: Estudio preclínico / Effect of zoledronic acid and hydroxocobalamin treatment on bone microarchitecture in mice with induced periodontitis and osteoporosis: preclinical study

Objetivo. Evaluar el efecto del tratamiento con ácido zoledrónico e hidroxocobalamina sobre la microarquitectura ósea alveolar en ratones con periodontitis y osteoporosis inducidas. Métodos. Diseño experimental en fase preclínica. Se incluyeron 16 ratones hembras a quienes se les indujo osteoporosis mediante la ovariectomía total y también se indujo la periodontitis por inflamación por ligadura de seda negra 5/0 en el segundo molar maxilar, todos los protocolos fueron sometidos durante anestesia general. Los ratones se distribuyeron en 4 grupos: control, tratamiento con ácido zoledrónico, tratamiento con hidroxocobalamina y tratamiento combinado. A las 16 semanas, se realizó la autanasia, se realizó la disección para la evaluación mediante microtomografía; determinando la densidad mineral ósea (BMD), el volumen de hueso (BV/TV), espesor trabecular (Tb. Th), número de trabéculas (Tb.N), separación trabecular (Tb.Sp); se realizó el análisis descriptivo y bivariado mediante ANOVA de 1 vía considerando un 95% de nivel de confianza. Resultados. El grupo que recibió tratamiento combinado de ácido zoledrónico e hidroxocobalamina presentó mayor densidad mineral ósea (DMO), mayor volumen óseo (BV/TV) y menor separación trabecular (Tb.Sp) en comparación con el grupo de control (p<0,05). Conclusiones. El tratamiento combinado de ácido zoledrónico e hidroxocobalamina mejora las características microarquitectónicas óseas en ratones con osteoporosis y periodontitis inducidas.

Objective. Evaluate the effect of zoledronic acid and hydroxocobalamin treatment on alveolar bone microarchitecture in mice with induced periodontitis and osteoporosis. Methods. Experimental design in preclinical phase. Sixteen female mice were included in which osteoporosis was induced by total ovariectomy and periodontitis was also induced by inflammation by 5/0 black silk ligation of the maxillary second molar, all protocols were performed under general anesthesia. The mice were distributed into 4 groups: control, treatment with zoledronic acid, treatment with hydroxocobalamin and combined treatment. At 16 weeks, euthanasia was performed, dissection was performed for evaluation by microtomography; determining bone mineral density (BMD), bone volume (BV/TV), trabecular thickness (Tb.Th), number of trabeculae (Tb.N), trabecular separation (Tb.Sp); descriptive and bivariate analysis was performed using 1-way ANOVA with a 95% confidence level. Results. The group that received combined treatment of zoledronic acid and hydroxocobalamin presented higher bone mineral density (BMD), higher bone volume (BV/TV) and lower trabecular separation (Tb.Sp) compared to the control group (p<0.05). Conclusions. Combined treatment with zoledronic acid and hydroxocobalamin improves bone microarchitectural features in mice with induced osteoporosis and periodontitis.

In vitro antimicrobial activity of the triantibiotic paste, according to the time of application and storage

Introduction: Intracanal medication with antibiotics is used to ensure the success of treatments. However, no studies evaluating the efficacy of triantibiotic paste after several hours of preparation have been reported. Objective: To evaluate the antimicrobial activity of the triantibiotic paste against Enterococcus faecalis, according to the time of application and storage of the components used for its preparation. Methods: An experimental in vitro study was carried out in the microbiology laboratory of Universidad Nacional Mayor de San Marcos. The sample consisted of three colonies of Enterococcus faecalis, formed in bile-esculin agar. On three specific days (0, 14 and 28), the antimicrobial activity of the conventional (ciprofloxacin/metronidazole/minocycline) and modified (cefaclor/metronidazole/minocycline) paste was evaluated, measuring (mm) the inhibition zones. The freshly obtained components were used to prepare the paste on day 0, and the stored components (powdered antibiotics kept in amber glass bottles at room temperature) were used on days 14 and 28. Two interventions were performed on each specific day (morning and afternoon). Freshly prepared pastes were used in the morning (immediate application), while pastes stored for 6 hours (delayed application) were used in the afternoon. Results: On day 0, it was found that the modified triantibiotic paste of immediate application had higher antimicrobial activity than the one of delayed application (p = 0.046). On day 28, the conventional triantibiotic paste for immediate application showed higher antimicrobial activity than that for delayed application (p = 0.049). Pasta prepared with fresh components (day 0) had higher antimicrobial activity than pasta prepared with components stored for 14 and 28 days. Conclusions: The application time of the triantibiotic paste and the storage times of the components could influence the antimicrobial activity for the eradication of Enterococcus faecalis.

Introducción: La medicación intracanal con antibióticos se utiliza para asegurar el éxito de los tratamientos. Sin embargo, no se han reportado estudios que evalúen la eficacia de la pasta triantibiótica después de varias horas de preparación. Objetivo: Evaluar la actividad antimicrobiana de la pasta triantibiótica frente al Enterococcus faecalis, según el tiempo de aplicación y de almacenamiento de los componentes utilizados para su preparación. Métodos: Estudio experimental in vitro, realizado en el laboratorio de microbiología de la Universidad Nacional Mayor de San Marcos. La muestra consistió en tres colonias de Enterococcus faecalis, formadas en agar bilis-esculina. En tres días específicos (0, 14 y 28) se evaluó la actividad antimicrobiana de la pasta convencional (ciprofloxacina/metronidazol/minociclina) y modificada (cefaclor/metronidazol/minociclina), midiendo las zonas de inhibición (mm). Los componentes recién obtenidos se utilizaron para preparar la pasta el día 0, y los componentes almacenados (antibióticos pulverizados conservados en frascos de vidrio color ámbar a temperatura ambiente) se utilizaron los días 14 y 28. Se realizaron dos intervenciones en cada día específico (mañana y tarde). Las pastas recién preparadas se utilizaron por la mañana (aplicación inmediata), mientras que por la tarde se utilizaron las pastas almacenadas durante 6 horas (aplicación tardía). Resultados: El día 0, se encontró que la pasta triantibiótica modificada de aplicación inmediata presentó una actividad antimicrobiana superior a la de aplicación tardía (p = 0,046). El día 28, la pasta triantibiótica convencional de aplicación inmediata presentó una actividad antimicrobiana superior a la de aplicación tardía (p = 0,049). La pasta preparada con componentes recién obtenidos (día 0) tuvo una mayor actividad antimicrobiana que la pasta preparada con componentes almacenados durante 14 y 28 días. Conclusiones: El tiempo de aplicación de la pasta triantibiótica y los tiempos de almacenamiento de los componentes podrían influir en la actividad antimicrobiana para la erradicación de Enterococcus faecalis.

Evaluation of Current Evidence on the Use of Oral Antiseptics Against SARS-CoV-2: A Narrative Review.

Aims and Objectives: The detection of SARS-COV-2 in the oral cavity has generated endless claims about the efficacy of using oral mouthwashes to reduce viral load. This review aims to assess the current evidence on the use of oral antiseptics against SARS-CoV-2 and to assess the certainty of the evidence according to the GRADE system. The question this study focussed on was what is the efficacy of oral antiseptics against SARS-CoV-2? Materials and Methods: A bibliographic search was performed in Medline databases through PubMed, Science Direct, and Google Scholar (until February 2022), using search terms related to COVID-19 and oral antiseptics. Two independent researchers extracted the information from the articles included in an excel form. The identification and selection of the studies was carried out from August 2021 to February 2022. Results: It was found that oral antiseptics can have a potential beneficial effect on COVID-19, mainly in reducing viral load. However, these potential benefits are mainly based on in-vitro studies or clinical studies with various methodological limitations. At present, the certainty of the evidence is very low due to inconsistency (heterogeneity), moderate-to-high risk of bias, and imprecision of the results. Conclusion: The certainty of the current evidence on the efficacy of oral antiseptics against SARS-CoV-2 is very low, mainly due to the methodological limitations of the studies. Therefore, for evidence-based decision-making about this intervention, clinical studies with greater methodological rigor are required. Oral antiseptics could present potential benefits in patients with COVID-19 mainly by reducing viral load. However, a careful and conscious evaluation of the evidence is required for decision-making in clinical practice.

Synergistic anti-inflammatory effect of NSAIDs plus B vitamins administered pre and postoperatively in third molar surgery: randomized clinical trial / Efeito anti-inflamatório sinérgico da associação de AINEs e vitaminas do complexo B administrada no pré e pós-operatório de cirurgia de terceiros molares: ensaio clínico randomizado

Objective : The aim of the present study was to evaluate the synergistic anti-inflammatory effect of Non-steroidal anti-inflammatory drugs (NSAIDs) plus B vitamins administered pre and postoperatively in surgeries of impacted mandibular third molars. Material and Methods : Double-blind randomized clinical trial, sixty-six patients participated and were randomized into 2 groups. The control group was administered meloxicam 15 mg intramuscularly plus placebo orally and to the experimental group, meloxicam 15 mg intramuscularly plus vitamins B [B1, B6, and B12] orally; both treatments were administered preoperatively. The anti-inflammatory effect was evaluated by pain intensity, facial swelling (facial contour measurements), and mouth opening (distance between the upper and lower incisors) during the post-surgical phase. Student's t-test was performed for independent samples. Results : In all the evaluated times (1 hour, 6 hours, 12 hours, 24 hours, 2 days, and 3 days after the end of the surgery) the experimental group presented a significantly lower intensity of pain compared to the control group (p<0.05). The highest pain intensity was recorded at 6 hours (17.7 ± 9.1 mm in the experimental group and 34.5 ± 21.3 mm in the control group). Swelling and mouth opening were similar in both groups, at all times evaluated (p>0.05). Conclusion : In the present study, the administration of NSAIDs plus B vitamins (B1, B6, B12) produced lower intensity of pain compared to the administration of only NSAIDs. Nevertheless, swelling and mouth opening were similar in all evaluations for both study groups (AU)

Objetivo : O objetivo do presente estudo foi avaliar o efeito anti-inflamatório sinérgico de anti-inflamatórios não esteroidais (AINEs) com vitaminas do complexo B administrados no pré e pós-operatório de cirurgias de terceiros molares inferiores impactados. Material e Métodos: Ensaio clínico randomizado duplo-cego, 66 participantesque foram randomizados em 2 grupos. O grupo controle recebeu Meloxicam 15 mg por via intramuscular + placebo por via oral e o grupo experimental, Meloxicam 15 mg por via intramuscular + vitaminas B [B1, B6 e B12] por via oral; ambos os tratamentos foram administrados no pré-operatório. O efeito anti-inflamatório foi avaliado pela intensidade da dor, edema facial (medidas do contorno facial) e abertura da boca (distância entre os incisivos superiores e inferiores) durante a fase pós-cirúrgica. Foi aplicado o teste t de Student para amostras independentes. Resultados: Em todos os tempos avaliados (1 hora, 6 horas, 12 horas, 24 horas, 2 dias e 3 dias após o término da cirurgia) o grupo experimental apresentou uma intensidade de dor significativamente menor em relação ao grupo controle (p <0,05). A maior intensidade de dor foi registrada em 6 horas (17,7 ± 9,1 mm no grupo experimental e 34,5 ± 21,3 mm no grupo controle). Edema e abertura bucal foram semelhantes nos dois grupos, em todos os momentos avaliados (p>0,05). Conclusão: No presente estudo, a administração de AINEs com vitaminas do complexo B (B1, B6, B12) resultou em menor intensidade de dor em comparação com a administração apenas de AINEs. No entanto, o edema e a abertura da boca foram semelhantes em todas as avaliações para ambos os grupos de estudo (AU).

Evaluación del conocimiento sobre atención de emergencias médicas en dos facultades odontológicas del Perú / Evaluation of knowledge on medical emergency care in two schools of dentistry in Peru

Introducción: Las emergencias son circunstancias de aparición súbita que pueden presentarse durante la atención odontológica y pueden comprometer la vida del paciente; por ello, es necesario tener conocimientos sobre su diagnóstico y tratamiento primario para estabilizar al paciente. Objetivo: Determinar el nivel de conocimientos sobre la atención de emergencias médicas en estudiantes de Odontología de dos universidades peruanas. Material y Métodos: Estudio transversal descriptivo en el cual participaron 134 estudiantes de 7mo a 10mo ciclo, provenientes de la Universidad Científica del Sur y la Universidad Norbert Wiener. Se evaluaron los conocimientos sobre la atención de emergencias médicas considerando 3 dimensiones: diagnóstico, primeros auxilios y tratamiento farmacológico. La evaluación fue realizada mediante un cuestionario validado previamente. Resultados: El nivel general de conocimientos sobre la atención de emergencias médicas en ambas universidades fue regular, con 69,8 por ciento de estudiantes de la Universidad Científica del Sur y 53,5 por ciento de estudiantes de la Universidad Norbert Wiener; sin embargo, hubo diferencia significativa entre ambas universidades. (p=0,034). Asimismo, se observó diferencia significativa en el conocimiento sobre el diagnóstico, a favor de la Universidad Científica del Sur (p<0,05), pero no se encontraron diferencias al evaluar los conocimientos sobre primeros auxilios y tratamiento farmacológico (p<0,05). Conclusiones: La evaluación general de conocimientos sobre la atención de emergencias médicas en estudiantes de Odontología de Universidad Científica del Sur y la Universidad Norbert Wiener fue predominantemente regular(AU)

Introduction: Emergencies are circumstances of sudden onset that can occur during dental care and can compromise the patient's life; therefore, it is necessary to have knowledge about its diagnosis and primary treatment to stabilize the patient. Objective: To determine the level of knowledge about medical emergency care in dental students from two universities in Lima (Peru) in 2019. Material and Methods: A descriptive cross-sectional study that included 134 students from 7th to 10th cycle from the Científica del Sur University and the Norbert Wiener University was conducted. Knowledge of medical emergency care was evaluated considering 3 dimensions: diagnosis, first aid, and pharmacological treatment. The evaluation was carried out using a previously validated questionnaire. Results: The general level of knowledge on medical emergency care in both universities was regular, with 69,8 percent of students from Científica del Sur University and 53,5 percent of students from Norbert Wiener University; however, there was a significant difference between both universities (p = 0.034). Likewise, a significant difference was observed in the knowledge about diagnosis in favor of the Científica del Sur University (p0.05). Conclusions: The overall level of knowledge on medical emergency care in dental students at Científica del Sur University and Norbert Wiener University was predominantly fair(AU)

Sedative effect of midazolam in different vehicles for oral administration.

Context: Oral administration of midazolam is one of the most important protocols for producing adequate conscious sedation; however, it has an unpleasant taste and is poorly tolerated by pediatric patients. Aim: The aim of this study was to evaluate the sedative effect of diluted midazolam in different vehicles used to mask its unpleasant taste. Methods and Material: A total of 30 male mice (BALB-c) were randomly distributed in five groups. They were administered diluted midazolam in different vehicles (saline solution, paracetamol syrup, diclofenac suspension, multi-vitamin syrup, and boxed juice). All suspensions were administered orally (0.6 mg/Kg). The pH variation was evaluated with a digital pH meter, and the quality of sedation was evaluated in three tests: hole board test, grip strength test, and forced swimming test. Results: The paracetamol syrup vehicle was found to be the only vehicle which did not change its pH over time after dilution of midazolam. When evaluating the perforated platform, the greatest sedative effect was observed in the midazolam group with the paracetamol syrup (P > 0.05). Regarding grip strength, a difference was evident in all study groups at 45 minutes (P = 0.006); the midazolam group with the multi-vitamin syrup was less effective. Regarding the response time to forced swimming, the midazolam group with the paracetamol syrup presented the longest time at 15 and 30 minutes (5.39 ± 0.93 and 6.29 ± 0.83, respectively). Conclusion: The suspension of midazolam diluted in the paracetamol syrup is the most suitable for performing conscious sedation efficiently.

Lidocaína 2 % con adrenalina 1: 80000 alcalinizada con bicarbonato de sodio 8, 4 % en la anestesia dental / Lidocaine 2% with adrenaline 1: 80,000 alkalinized with sodium bicarbonate 8. 4 % in dental anesthesia

Introducción: La alcalinización de la lidocaína ha resultado ser exitosa en el bloqueo del nervio dentario inferior, sin embargo, existen resultados contradictorios respecto a su eficacia clínica. Objetivo: Determinar el efecto de la lidocaína 2 por ciento con adrenalina 1:80000 alcalinizada con bicarbonato de sodio al 8,4 % sobre el bloqueo del nervio dentario inferior. Material y métodos: Estudio experimental, prospectivo y longitudinal conformado por 50 pacientes de la Facultad de Odontología de la Universidad Nacional Mayor de San Marcos. Las siguientes soluciones fueron administradas para el bloqueo del nervio dentario inferior: lidocaína 2 por ciento con adrenalina 1:80000 alcalinizada con bicarbonato de sodio al 8,4 por ciento y lidocaína 2 por ciento con adrenalina 1:80000 no alcalinizada. Se evaluó la intensidad del dolor por la inyección, parámetros hemodinámicos y periodos anestésicos (tiempo de inicio de acción y duración del efecto anestésico). Resultados: Se evidenció una menor intensidad del dolor por la inyección en el grupo de lidocaína alcalinizada (19,16 ± 2,7) en comparación al grupo de lidocaína no alcalinizada (22,88 ± 4,2); p=0,02. Así mismo, el tiempo de inicio de acción fue menor en el grupo de lidocaína alcalinizada (105,72 ± 9,7s) en comparación con el grupo de lidocaína no alcalinizada (157,52 ± 12,1); p=0,002. Sin embargo, no se evidenciaron diferencias significativas en los parámetros hemodinámicos (p>0,05) y la duración del efecto anestésico (p=0,114). Conclusiones: La lidocaína 2 por ciento con adrenalina 1:80000 alcalinizada con bicarbonato de sodio al 8,4 por ciento sobre el bloqueo del nervio dentario inferior produce una disminución de la intensidad del dolor por la inyección y del tiempo de inicio de acción, en comparación con la formulación no alcalinizada. Sin embargo, no se evidencian diferencias en relación con los parámetros hemodinámicos ni a la duración del efecto anestésico(AU)

Introduction: The alkalinization of lidocaine has been successful in blocking the inferior dental nerve; however, there are contradictory results regarding its clinical efficacy. Objective: To determine the effect of 2 percent lidocaine with 1: 80,000 adrenaline alkalinized with 8.4 percent sodium bicarbonate on inferior dental nerve block. Material and methods: Experimental, prospective and longitudinal study that comprised 50 patients from the Dental School of the National University of San Marcos. The following solutions were administered for inferior dental nerve block: 2 percent lidocaine with epinephrine 1: 80,000 alkalinized with 8.4 percent sodium bicarbonate and 2 percent lidocaine with 1: 80,000 adrenaline not alkalinized. Pain intensity was evaluated by injection, hemodynamic parameters and anesthetic periods (time of onset of action and duration of the anesthetic effect). Results: There was a lower pain intensity due to injection in the alkalized lidocaine group (19.16 ± 2.7) compared to the non-alkalinized lidocaine group (22.88 ± 4.2); p=0.02. Likewise, the onset time of action was lower in the alkalized lidocaine group (105.72 ± 9.7) compared to the non-alkalinized lidocaine group (157.52 ± 12.1); p=0.002. However, no significant differences were found in the hemodynamic parameters (p>0.05) and the duration of the anesthetic effect (p=0.114). Conclusions: Lidocaine 2 percent with adrenaline 1: 80,000 alkalized with sodium bicarbonate at 8.4 percent on the block of the inferior dental nerve produces a decrease in pain intensity due to injection and the time of onset of action, compared to the non-alkalinized formulation. However, there are no differences in relation to the hemodynamic parameters or the duration of the anesthetic effect(AU)

Protective effect of Chuquiraga spinosa Lessing associated with simvastatin on N-Nitroso-N-methylurea (NMU)-induced prostate cancer in rats.

BACKGROUND AND OBJECTIVE: Chuquiraga spinosa Lessing (ChS) has shown protective effect on  N-Nitroso-N-methylurea (NMU)-induced prostate cancer in rats. Currently, statins are being studied for their pro-apoptotic and antimetastatic effects. The main objective of this research was to determine the protective effect associated with the oral administration of simvastatin and ethanolic extract of the aerial parts of ChS in the prevention of prostate cancer. METHODS: Fifty-six albino male rats were randomized into seven groups: I) negative control: physiological serum: 2 mL/kg; II) TCN: testosterone 100 mg/kg + cyproterone 50 mg/kg + NMU 50 mg/kg; III) TCN + S40 (simvastatin 40 mg/kg); IV) TCN + ChS250 (ChS 250 mg/kg); V) TCN + ChS50 (ChS 50 mg/kg) + S40; VI) TCN + ChS250 (ChS 250 mg/kg) + S40; and VII) TCN + ChS500 (ChS 500 mg/kg) + S40. The antioxidant activity was tested by using (2,2-diphenyl-1-picrylhydrazyl) (DPPH) assay. Hematology, toxicological biochemical parameters, prostate-specific antigen (PSA), histology and prostate size were evaluated as main indicators of protective effect. RESULTS: Triglyceride values were decreased in the groups receiving ChS, being significant (P=0.02) in IV and VII group compared to cancer-inducing group (TCN). In groups that received ChS, PSA levels (P=0.71) were significant compared with TCN group. The VII group had the lowest prostate volume by sonography. The TCN group showed multiple foci of high-grade prostatic intraepithelial neoplasia (HG-PIN) with the presence of cells in mitosis; whilst, groups V and VI had few areas of HG-PIN. CONCLUSION: In experimental conditions, the ethanolic extract of C. spinosa in association with simvastatin showed a protective effect on prostate cancer through hypolipidemic and antioxidant activity.

Efecto analgésico de la asociación de diclofenaco y vitaminas B1, B6 y B12 en cirugía de tercer molar / Analgesic effect of the association of diclofenaco and vitamins B1, B6 and B12 in third molar surgery

OBJETIVO: Evaluar el efecto analgésico de la administración de la asociación de diclofenaco con vitaminas B en pacientes sometidos a cirugía electiva de tercer molar mandibular. MATERIAL Y MÉTODO: Ensayo clínico controlado aleatorizado doble ciego que incluyó 70 pacientes divididos en 2 grupos, un grupo recibió diclofenaco más vitaminas B (experimental) y el otro solo diclofenaco (control). La variable principal fue la intensidad del dolor según escala visual análoga (EVA) después de 1, 3, 6, 9, 12 y 24 horas de finalizar la cirugía; las variables secundarias fueron el tiempo para analgesia de rescate y el consumo total de analgésicos en el postoperatorio. RESULTADOS: La intensidad del dolor fue incrementándose en ambos grupos hasta las 6 horas (p > 0,05). A las 24 horas se percibió la mayor intensidad del dolor en ambos grupos de estudio, siendo significativamente menor en el grupo experimental (3,21 +/- 1,31) en comparación con el grupo control (4,89 +/- 1,42); p = 0,035. El tiempo para analgesia de rescate fue significativamente mayor en el grupo experimental (11,32 +/- 2,31 horas) en comparación al grupo control (8,93 +/- 1,91 horas); p = 0,001. El consumo total de analgésicos fue menor en el grupo experimental (6,17 +/- 1,42 tabletas) en comparación al grupo control (6,49 +/- 0,97 tabletas); p = 0,10. CONCLUSIÓN: La administración de la asociación de diclofenaco con vitaminas B evidenció un mayor efecto analgésico en comparación a solo diclofenaco en pacientes sometidos a cirugía electiva de tercer molar mandibular

OBJECTIVE: To evaluate the analgesic effect of the administration of the association of diclofenac with B vitamins in patients undergoing elective mandibular third molar surgery. MATERIAL AND METHOD: Randomized controlled double blind clinical trial that included 70 patients divided into 2 groups, one group received diclofenac plus B vitamins (experimental) and the other only diclofenac (control). The main variable was pain intensity according to visual analog scale (VAS) after 1, 3, 6, 9, 12 and 24 hours after the surgery was completed; the secondary variables were the time for rescue analgesia and the total consumption of analgesics in the postoperative period. RESULTS: The pain intensity was increased in both groups until 6 hours (p > 0.05). At 24 hours, the highest pain intensity was perceived in both study groups, being significantly lower in the experimental group (3.21 +/- 1.31) compared to the control group (4.89 +/- 1.42); p = 0.035. The time for rescue analgesia was significantly higher in the experimental group (11.32 +/- 2.31 hours) compared to the control group (8.93 +/- 1.91 hours); p = 0.001. The total analgesic consumption was lower in the experimental group (6.17 +/- 1.42 tablets) compared to the control group (6.49 +/- 0.97 tablets); p = 0.10. CONCLUSION: The administration of the association of diclofenac with vitamins B showed a greater analgesic effect compared to only diclofenac in patients undergoing elective mandibular third molar surgery

Antioxidant and Cytoprotective Effect of Piper aduncum L. against Sodium Fluoride (NaF)-Induced Toxicity in Albino Mice.

Piper aduncum, commonly known as matico, is a plant that grows in the mountainous and coastal regions of Peru, and is studied for its antimicrobial properties and various ethnopharmacological uses. The main objective of this study was to determine the cytoprotective and antioxidant effects of the methanolic extract of Piper aduncum leaves in Mus musculus previously administered with sodium fluoride (NaF) using the Micronucleus test and the Comet assay. The extract was administrated orally in four different concentrations: 150, 300, 600, and 1200 mg/Kg for ten days. At the 11th day, a single dose of NaF was administrated via intraperitoneal at 20 mg/Kg. The genotoxicity study was performed with mice from the strain BALB/c, using the Micronucleus test on bone marrow and the Comet assay on peripheral blood according to OECD guidelines 474 and 489, respectively. The statistical analysis was performed by median analysis with ANOVA. Significant differences were found in Micronucleus frequency between the highest concentrations of Piper aduncum and NaF. The Comet assay showed significant reduction of NaF-induced damage on erythrocytes depending on the different concentrations of the extract which were evaluated in this study. It is concluded that the methanolic extract of P. aduncum leaves has cytoprotective and antioxidant activity against sodium fluoride.

Effects of NSAIDs and environmental oxygen pressure on bone regeneration / Efecto de los AINEs y la presión de oxígeno ambiental sobre la regeneración ósea

Objective: To evaluate the effects of administering diclofenac and ketoprofen, as well as the effects of environmental oxygen pressure variation on mandibular bone regeneration. Methods: Thirty-six guinea pigs were distributed into two equal groups. Mandibular bone defects were performed on both groups. Group A was monitored under oxygen pressure at altitude (3320msl, 107mm Hg). Group B was monitored at sea level oxygen pressure (150msl, 157mm Hg). Each group was subdivided into 3 equal groups (A1, A2, A3 and B1, B2, B3). Subgroups A1 and B1 were given diclofenac; subgroups A2 and B2 ketoprofen; subgroups A3 and B3 NaCl. Bone regeneration was evaluated histologically on days 15 and 30. Results: After 15 days in the group controlled at sea level, the level of osteoblasts presented by the control subgroup was significantly higher (28.00±2.65) compared to the diclofenac subgroup (16.00±6.25) and to the ketoprofen subgroup (18.00±4.36); (p=0.041). After 15 days in the group controlled at altitude, the level of osteoblasts was significantly higher in the control subgroup (38.00±5.29) compared to the diclofenac subgroup (21.67±6.35) and to the ketoprofen subgroup (19.33±2.52); p=0.007. After 30 days in the group at sea level there was no difference found in the cell counting; p>0.05. After 30 days in the group controlled at altitude, the level of osteoblast was significantly higher in the control subgroup (58.00±4.58) compared to the diclofenac subgroup (34.33±4.73) and the ketoprofen subgroup (34.00±11.14); (p=0.003). Conclusion: The administration of diclofenac and ketoprofen produced lower mandibular bone regeneration, the effect being significantly more negative at sea level.

Objetivo: Evaluar el efecto de la administración de diclofenaco y ketoprofeno y de la variación de la presión de oxígeno ambiental sobre la regeneración ósea mandibular. Métodos: Participaron 36 cobayos distribuidos en dos grupos iguales. A ambos grupos se les realizaron defectos óseos mandibulares. El Grupo A fue controlado bajo presión de oxígeno en altura (3320msnm, 107mm Hg). El Grupo B fue controlado bajo presión de oxígeno a nivel del mar (150msnm, 157mm Hg). Cada grupo fue dividido en 3 subgrupos iguales (A1, A2, A3 y B1, B2, B3). Los subgrupos A1 y B1 recibieron diclofenaco; A2 y B2, ketoprofeno; A3 y B3, NaCl. La regeneración ósea fue evaluada histológicamente a los 15 y 30 días. Resultados: A nivel del mar, a los 15 días, hubo una significativa mayor cantidad de osteoblastos en el subgrupo control (28,00±2,65) comparado con el subgrupo diclofenaco (16,00±6.25) y ketoprofeno (18,00±4.36); (p=0,041). En altura, a los 15 días, hubo una significativa mayor cantidad de osteblastos en el subgrupo control (38,00±5,29) comparado con el subgrupo diclofenaco (21,67±6,35) y ketoprofeno (19,33±2,52); p=0,007. A nivel del mar, a los 30 días, no se encontró diferencia en el conteo celular; p>0,05. En altura, a los 30 días, se encontró una significativa mayor cantidad de osteoblastos en el subgrupo control (58,00±4,58) comparado con el subgrupo diclofenaco (34,33±4,73) y ketoprofeno (34,00±11,14); (p=0,003). Conclusión: La administración de diclofenaco y ketoprofeno produjeron una menor regeneración ósea mandibular, siendo este efecto significativamente más negativo a nivel del mar.

Preventive effect of Oenothera rosea on N-methyl-N-nitrosourea-(NMU) induced gastric cancer in rats.

BACKGROUND: Currently, gastric cancer (GC) is considered a public health problem worldwide. Using medicinal plants for the prevention of chronic diseases such as cancer constitutes new alternatives in traditional medicine. Oenothera rosea (OR) could be an option, but it needs to be evaluated. AIM: The main objective of this study was to evaluate the protective effect of OR extract on N-methyl-N-nitrosourea (NMU)-induced GC in rats. METHODS: In total, 80 male Holtzman rats were randomized into five groups. Group A received the saline solution (5mL/kg), group B received NMU 500 µg/kg (cancer inductor) by oral administration for 16 weeks, and groups C, D, and E were treated with OR extract (100, 200, and 300 mg/kg, respectively) and NMU in order to evaluate the preventive effect on cancer induced by NMU for 16 weeks. Blood and histological samples of stomachs were collected to determine histopathological, biochemical, and hematological parameters between different experimental groups. RESULTS: Groups C, D, and E presented less histopathological changes such as anaplastic and hyperplastic cells, compared with group B. Hematological and biochemical parameters were recorded, and superoxide dismutase, malondialdehyde, and nitric oxide levels were statistically less than those of NMU group (P<0.05, P<0.01, and P<0.01). CONCLUSION: Considering the histopathological signs and the antioxidant activity in vivo as well as hematological and biochemical parameters of ethanolic extract of OR, we concluded that its administration in rats has a protective effect on GC, which is induced experimentally. This species could be studied in clinical trials for patients with GC in the future.

Influencia de la presión de oxígeno ambiental sobre la regeneración ósea guiada / Influence of ambient oxygen pressure on guided bone regeration

RESUMEN: Objetivo: Evaluar la influencia de la variación en la presión de oxígeno ambiental sobre la regeneración ósea guiada en cobayos. Material y método: Treinta y dos cobayos machos de 750±50g de peso fueron asignados en 2 grupos de 16 integrantes cada uno (grupo A: trabajado a 150msnm en la ciudad de Lima y a presión de oxígeno de 157mmHg; grupo B: trabajado a 3.230msnm en la ciudad de Jauja y a presión de oxígeno de 107mmHg). En ambos grupos se indujeron defectos óseos mandibulares de 5×6mm a través de un acceso quirúrgico extraoral; a 8 cobayos de cada grupo se les recubrió el defecto con una membrana de colágeno reabsorbible de origen porcino, mas al resto de animales no. Se evaluó el conteo celular de osteoblastos y osteocitos a los 15 y 30 días postoperatoriamente. Resultados: A los 15 y a los 30 días, en los grupos trabajados en altura y en los que se aplicó la membrana, la cantidad de osteoblastos fue 71±12,1 cél/camp y 83±7,2 cél/camp respectivamente, y la de osteocitos fue 34,5±6,6 cél/camp y 25±7,6 respectivamente; siendo estos grupos, en todas las comparaciones, los que tuvieron mayor cantidad de células óseas, aunque sin ser diferencias estadísticamente significativas (p>0,05). Conclusión: Se encontró tendencia a formar mayor cantidad de células óseas en las muestras tratadas con regeneración ósea y expuestas a la altitud comparados con el nivel del mar.

ABSTRACT: Objective: To evaluate the influence of the variation in ambient oxygen pressure on guided bone regeneration in guinea pigs. Material and method: A total of 32 male guinea pigs weighing 750±50g were assigned into two groups of 16 (group A: studied at 150 metres above sea level in the city of Lima and oxygen pressure of 157mmHg; group B: was at 3230 meters above sea level in the city of Jauja and an oxygen pressure of 107mmHg). Bone defects of 5×6mm were induced in the jaw in both groups through extra-oral surgical access. The defect in 8 guinea pigs of each group were covered with a porcine resorbable collagen membrane, but not in the other animals. The osteoblast and osteocyte cell counts were evaluated at 15 and 30 days post-operatively. Results: At 15 and 30 days, in the groups studied at height and with the membrane applied, the osteoblast count was 71±12.1 cells/field, and 83±7.2 cells/field, respectively, and an osteocyte count of 34.5±6.6 cells/field, and 25±7.6 cells/field, respectively. These groups had a higher number of bone cells in all the comparisons, but there were no statistically significant differences (P>.05). Conclusion: There was a tendency to form a greater amount of bone cells was found in the samples treated with bone regeneration and exposed to altitude compared to those at sea level.

Efecto antiinflamatorio de la emulsión dérmica del extracto etanólico de Peperomia choroniana D. CD. (ipitanki) en edema auricular inducido por xilol en ratones / Anti-inflammatory effect of a dermal emulsion obtained from an ethanolic extract of Peperomia choroniana D. CD. (Ipitanki) on xylene-induced edema in mice

Objetivo: Evaluar el efecto antiinflamatorio de la emulsión dérmica del extracto etanólico de Peperomia choroniana en edema auricular inducido por xilol en ratones. Materiales y Métodos: Estudio Experimental. Se elaboró una emulsión dérmica del extracto etanólico de partes aéreas de Peperomia choroniana, la que se aplicó en ratones Swiss a quienes se les indujo inflamación con Xilol. Se formaron seis grupos de seis ratones cada uno. El grupo I recibió Crema Base; el grupo II, Dexametasona crema 0.05%; el grupo III, diclofenaco gel 1%; los grupos IV, V y VI; emulsión dérmica del extracto etanólico de Peperomia choroniana a las concentraciones de 0.1%, 0.5% y 1% respectivamente. Posterior a ello, se midió los indicadores de edema auricular de ratones (diferencia de peso), inflamación cualitativa, temperatura auricular y se realizo un estudio histopatológico. Resultados: Se encontró efecto antiinflamatorio en las emulsiones dérmicas de Peperomia choroniana al 0.5% (54.6%) y al 1% (51.1%); así­ mismo, la emulsión dérmica al 0.5% redujo significativamente (p<0.05) la temperatura auricular. El estudio histopatológico mostró escaso infiltrado inflamatorio e incremento de fibroblastos en los grupos tratados con la emulsión a diferentes concentraciones. Conclusiones: La emulsión dérmica de Peperomia choroniana al 0.5% posee efecto antiinflamatorio tópico superior al diclofenaco gel 1% pero inferior a la dexametasona crema 0.05% en la reducción de la inflamación y temperatura localizada.

Antiallergic effect of the atomized extract of rhizome of Curcuma longa, flowers of Cordia lutea and leaves of Annona muricata.

INTRODUCTION: Allergies are a problem that greatly affects the population, and hence the use of antiallergic medications is fairly widespread. However, these drugs have many adverse effects. The use of medicinal plants could be an option, but they need to be evaluated. OBJECTIVE: This study was designed to evaluate the antiallergic effect of the atomized extract of rhizome of Curcuma longa, flowers of Cordia lutea, and leaves of Annona muricata. MATERIALS AND METHODS: Twenty-four New Zealand white albino rabbits were randomized into 2 groups. Group A received the atomized extract diluted in physiological saline (APS) and group B received it diluted in Freund's adjuvant (FA). Then, the back of each rabbit was divided into 4 quadrants. The A-I quadrant received only physiological saline. The A-I quadrants of each rabbit conformed the PS group. The following 3 quadrants received the APS in 10 µg/mL, 100 µg/mL, and 1,000 µg/mL, respectively. The B-I quadrant received only FA. The B-I quadrants of each rabbit conformed the FA group. The following 3 quadrants received the AFA in 10 µg/mL, 100 µg/mL, and 1,000 µg/mL, respectively. The occurrence of erythema and edema was recorded according to the Draize scoring system and the primary irritation index. After 72 hours, biopsies were performed. RESULTS: The AFA group presented significantly less erythema and edema compared to the FA group (P<0.05). The histopathologic evaluation at 72 hours showed normal characteristics in the APS group. CONCLUSION: Considering the clinical and histopathological signs, we conclude that the administration of the atomized extract of rhizome of C. longa, flowers of C. lutea, and leaves of A. muricata lacks antigenic effect but could have an antiallergenic effect in a model of dermal irritation in rabbits.

Caracteristicas fitoqu¡micas y capacidad antioxidante in vitro de Aloe vera, Plukenetia volubilis, Caiophora carduifolia, Cecropia membranácea / In vitro phytochemical characteristics and antioxidant capacity of Aloe vera, Plukenetia volubilis, Caiophora carduifolia, Cecropia membranacea

Introducción: Los antioxidantes han demostrado potencial quimioprotector en patolog¡as degenerativas, inflamatorias, autoinmunes, oncológicas y asociadas al distr‚s respiratorio. Objetivo: Evaluar las caracter¡sticas fitoqu¡micas y capacidad antioxidante in vitro mediante el m‚todo DPPH y ABTS. Diseño: Observacional anal¡tico. Lugar: Laboratorio de Farmacolog¡a Experimental, Facultad de Medicina Humana, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico/qu¡mico: Hojas de Aloe vera, semillas de Plukenetia volubilis, hojas-tallos de Caiophora carduifolia, hojas de Cecropia membranacea. Intervenciones: Observación y an lisis de la capacidad antioxidante mediante el m‚todo DPPH-concentración efectiva media (CE50) de los extractos y la capacidad antioxidante equivalente a trolox por el m‚todo del ABTS. Medida de resultados: Marcha fitoqu¡mica preliminar, porcentaje de inhibición antioxidante por captación del radical DPPH, determinación del equivalente trolox/g extracto. Resultados: La Cecropia membranacea presenté mayor número de metabolitos secundarios, alcaloides, saponinas, compuestos flavonoides; en la captación de radicales DPPH, requirió menor dosis para alcanzar la capacidad antioxidante (CE50=0,159 mg/mL); mediante el m‚todo ABTS (5,834 uM trolox/g). La Caiophora carduifolia (0,87 mg/mL – 0,44 mg/mL) tuvo efectos similares al trolox (p>0,05). El Aloe vera y Plukenetia volubilis tambi‚n tuvieron capacidad antioxidante dependiente de la dosis. Conclusiones: Se ha demostrado capacidad antioxidante in vitro a concentración dependiente, siendo mayor la de Cecropia membranacea y Caiophora carduifolia y menor la de Aloe vera y Plukenetia volubilis.

Introduction: Antioxidants have shown chemopreventive potential in degenerative, inflammatory, autoimmune, oncology and respiratory distress associated pathologies. Objective: To assess the phytochemical and antioxidant properties in vitro by DPPH and ABTS method. Design: Observational analytical. Location: Laboratory of Experimental Pharmacology, Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru. Biological/Chemical Material: Aloe vera leaves, Plukenetia volubilis seeds, Caiophora carduifolia leaves-stalks, Cecropia membranacea leaves. Interventions: Observation and analysis of the antioxidant capacity by DPPH-method mean effective concentration (EC50) of the extracts and trolox equivalent antioxidant capacity by the ABTS method. Main outcome measures: Phytochemical preliminary march, antioxidant percent uptake inhibition by DPPH radical, determination of equivalent trolox/g extract. Results: Cecropia membranacea presented more secondary metabolites, alkaloids, saponins, flavonoid compounds; required smaller dosage to achieve the antioxidant effect (EC50 = 0.159 mg/mL) in attracting DPPH radical; achieved the best antioxidant effect by ABTS method (5.834 uM trolox/g). Caiophora carduifolia (0.87 mg/mL – 0.44 mg/mL) had trolox similar effects (p>0.05). Aloe vera and Plukenetia volubilis also had antioxidant dose dependent effect. Conclusions: Concentration dependent in vitro antioxidant effect has been shown, higher with Cecropia membranacea and Caiophora carduifolia and lower with Aloe vera and Plukenetia volubilis.

Estudio de toxicidad a 28 días, del extracto atomizado de rizoma de Curcuma longa (A4R), flores de Cordia lutea (A4F) y hojas de Annona muricata (A4L) en un modelo murino / Study of toxicity to 28 days, of the atomized extract of the rhizome of Curcuma longa (A4R), Cordia lutea flowers (A4F) and leaves of Annona muricata (A4L) in a murine model

La asociación de las tres plantas ha sido aprobada por la Institución de Salud en Canadá, bajo la forma de extracto lioilizado, la cual ha demostrado poseer efectos terapéuticos. Objetivos: Determinar la seguridad de la asociación del extracto atomizado del rizoma de Curcuma longa (A4R); lores de Cordia lutea (A4F) y hojas de Annona muricata (A4L) a una dosis repetida durante 28 días por vía oral en ratas. Materiales y métodos: Diseño experimental, se utilizaron 40 ratas Holtzman (20 machos ­ 20 hembras); se siguió las directrices o normas de la Organization for Economic Cooperation and Development (OECD) Norma 407; se administró el extracto atomizado durante 28 días por vía oral, se realizaron las observaciones, registro de signos y evolución semanal del peso corporal de los animales; al final, se extrajo muestra de sangre para estudio hematológico y bioquímico; posteriormente, fueron sacrificados para estudio anatomopatológico de hígado, riñón, corazón, médula, cerebro, páncreas, y bazo; se aplicó el ANOVA, considerando el valor p<0,05 para la significancia. Resultados: Al administrar la asociación en forma de extracto atomizado, se observó una evolución temporal homogénea del peso corporal. No hubo variación significativa en los niveles de glucemia, urea, colesterol, triglicéridos, bilirrubina indirecta, transaminasas (GPT­ GOT), fosfatasa alcalina ni hemoglobina (p>0,05); Conclusiones: Los hallazgos demuestran que el extracto atomizado del rizoma de Curcuma longa (A4R), las flores de Cordia lutea (A4F) y las hojas de Annona muricata (A4L) no es toxico en ratas, al ser administrado por un periodo de 28 días.

Toxicidad a 90 días del extracto atomizado de rizoma de Curcuma longa (A4R), Flores de cordia lutea (A4F) y hojas de Annona muricata (A4L) en modelo murino / 90-day toxicity of the extract of rhizome of Curcuma longa (A4R), Flowers of Cordia lutea (A4F) and leaves of Annona muricata (A4L) in murine mode

Objetivos: Determinar la seguridad de la asociación del extracto atomizado del rizoma de Curcuma longa (A4R), flores de Cordia lutea (A4F) y hojas de Annona muricata (A4L) a una dosis repetida durante 90 días por vía oral en ratas. Material y métodos: Diseño experimental, se utilizaron 108 ratas Holtzman (54 machos ­ 54 hembras) y se administró el extracto atomizado durante 90 días por vía oral, se realizaron las observaciones, registro de signos y evolución cada 30 días del peso corporal de los animales; al final, se extrajo muestra de sangre para estudio hematológico, hepático, lipídico y antioxidante, se aplicó la prueba ANOVA, considerando el valor p<0,05 para la significancia. Resultados: La asociación de extracto atomizado (ALC) evidenció un incremento significativo del peso para el grupo ALC 200 mg/kg; en las ratas macho a partir de los 30 días (p<0,01) y en ratas hembra a partir de los 60 días (p<0,01) manteniendo dicho patrón a los 90 días. Todos los valores hematológicos y bioquímicos durante los 90 días se mantuvieron dentro de parámetros permitidos. Se observó un incremento en la actividad de la superoxido dismutasa (SOD) desde los primeros 30 días y manteniendo el mismo hasta el final, independientemente del género (p<0,05). Conclusión: Los hallazgos demuestran que el extracto atomizado del rizoma de Curcuma longa (A4R), flores de Cordia lutea (A4F) y hojas de Annona muricata (A4L) no produce toxicidad al ser administrado por un periodo de 90 días en ratas.

Influencia de la temperatura de la lidocaína 2 por ciento con epinefrina 1: 80.000 sobre el dolor por inyección e inicio de acción en el bloqueo del nervio dentario inferior / Effect of themperature of lidocaine 2 per cent with epinephrine 1: 80.000 on pain from injection and onset of action in inferior alveolar nerve block

La colocación de anestesia local genera un dolor manifestado por los pacientes, pues antes de que el anestésico inicie su efecto, ingresa a la mucosa a una temperatura inferior a la corporal y produce un estímulo doloroso. El objetivo de este estudio fue determinar la influencia de la temperatura de la lidocaína al 2 por ciento con epinefrina 1:80,000 sobre el dolor por inyección e inicio de acción. Material y métodos: Se realizó un estudio ciego en 38 pacientes sometidos a dos aplicaciones de lidocaína 2 por ciento con epinefrina 1:80,000 a temperatura de 37o C y temperatura ambiente. Resultados: Según la escala visual análoga, se obtuvieron para la administración de anestesia a 37o C valores de 6.63 ± 5.037 mm, y para la administración a temperatura ambiental, valores de 12.870 ± 12.001 mm (p < 0.05). Según la escala de respuesta verbal, se encontró que para la administración de anestesia a 37o C, el 100 por ciento manifestó un dolor menor a lo esperado¼, mientras que en la administración a temperatura ambiente, sólo 61 por ciento manifestó olor menor de lo esperado¼ (p < 0.05). En relación con el tiempo de inicio de acción, se encontró que la administración de anestesia a 37o C presentó un valor de 201.66 ± 85.336 segundos, mientras que para la administración a temperatura ambiente, se presentó un valor de 286.66 ± 84.292 segundos (p < 0.05). Conclusión: La administración del anestésico local a 37o C produce menor intensidad de dolor y menor tiempo de inicio de acción en compa-ración con la administración de anestésico local a temperatura ambiente.

The placement of local anesthesia causes pain in patients due to the fact that before the anesthetic takes effect, it fi rst enters the mucosa at a temperature that is below body temperature, which results in a pain stimulus. The aim of this study was to determine the extent to which the temperature of lidocaine 2% with epinephrine 1:80,000 affects the pain caused by an injection and the onset of action. Material and methods:We performed a blind study involving 38 patients who received two applications of lidocaine 2% with epinephrine 1:80,000, one at 37 oC and the other at room temperature. Results: Based on the visual analog scale, administering anesthesia at 37 oC produced values of 6.63 ± 5.037 mm, and at room temperature, values of 12.870 ± 12.001 mm (p < 0.05). On the verbal response scale, administering anesthesia at 37 oC resulted in 100% expressing ®less than expected¼ pain, while the administration at room temperature resulted in only 61% expressing ®less than expected¼ pain (p < 0.05). In terms of time to onset of action, it was found that administering anesthesia at 37 oC produced a value of 201.66 ± 85.336 seconds, whereas at room temperature, the value was 286.66 ± 84.292 seconds (p < 0.05). Conclusion: Administering the local anesthetic at 37 oC produces a lower pain intensity and shorter onset of action compared to doing so at room temperature.