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1.
J Oral Rehabil ; 47(1): 27-35, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31357241

RESUMO

BACKGROUND: A functional integration between the jaw and neck regions during purposive jaw movements is well described in adults, but there is a lack of knowledge of such integration during jaw function in children. OBJECTIVES: To determine the movement integration between the jaw and neck during jaw motor tasks in 6-year-olds, whether there is a difference between children and adults. METHODS: Jaw and neck movements were recorded with an optoelectronic 3D system in 25 healthy 6-year-olds (12 girls, 13 boys) and 24 healthy adults (12 women, 12 men) during paced jaw opening-closing and self-paced gum chewing. Jaw and neck movement amplitudes, intra-individual variation in movement amplitude, ratio between neck-jaw movement amplitudes and movement cycle time were analysed. Differences between children and adults were evaluated with Mann-Whitney U test for independent samples. RESULTS: Compared to adults, 6-year-old children showed larger neck movement amplitudes (P = .008) during chewing, higher intra-individual variability in amplitudes of jaw (P = .008) and neck (P = .001) movements, higher ratio between neck-jaw movement amplitudes for jaw opening-closing (P = .026) and chewing (P = .003), and longer jaw movement cycle time (P ≤ .0001) during the jaw opening-closing task. CONCLUSION: Despite integrated jaw-neck movements in 6-year-old children, the movement pattern differs from that of adults and may be interpreted as an immature programming of jaw-neck motor behaviour. The well-integrated movements observed in adults most likely develop over years, perhaps into adolescence, and needs further research including well-controlled longitudinal studies to map this development in order to provide appropriate age-related clinical treatment for functional disorders.


Assuntos
Movimentos da Cabeça , Músculos do Pescoço , Adulto , Criança , Feminino , Humanos , Arcada Osseodentária , Masculino , Mandíbula , Mastigação , Movimento , Pescoço
2.
Quintessence Int ; 51(1): 50-55, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31792469

RESUMO

Diffuse large B-cell lymphoma is an aggressive, fast-growing form of non-Hodgkin disease with rare manifestation in mandible as a primary site. Absence of pathognomonic features in this localization often leads to misdiagnosis as an odontogenic process or its delayed diagnosis. The present case report is of a patient in whom non-odontogenic jaw pain mimicked a toothache prompting multiple dental interventions before persistence of pain and atypical findings led to consideration of a primary malignant etiology.


Assuntos
Linfoma Difuso de Grandes Células B , Odontalgia , Diagnóstico Tardio , Diagnóstico Diferencial , Erros de Diagnóstico , Humanos , Mandíbula
3.
Artigo em Inglês | MEDLINE | ID: mdl-31815976

RESUMO

The purpose of this study was to evaluate the effect that microgrooved abutments may have on peri-implant tissues. After the flapless extractions of the mandibular premolars of eight dogs, four Laser-Lok implants were placed in each mandibular quadrant, and half of them received laser-microgrooved abutments. A xenograft (MinerOss X, BioHorizons) was used in the gaps. The dogs were euthanized 12 weeks after treatment, and the histomorphometric analysis was performed. Unlike the machined abutments, the microgrooved abutments influenced the orientation of connective tissue fibers, which appeared perpendicularly and adhered to the implant-abutment surfaces, preventing the apical migration of the junctional epithelium. Laser-microgrooved abutments showed superior results.


Assuntos
Dente Suporte , Implantes Dentários , Animais , Remodelação Óssea , Implantação Dentária Endo-Óssea , Cães , Inserção Epitelial , Mandíbula
4.
Eur J Paediatr Dent ; 20(4): 280-284, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31850769

RESUMO

AIM: The use of rapid maxillary expander (RME) combined with eruption guidance appliances (EGA) represents a valid method in the treatment of skeletal Class II deep bite patients. In this paper a retrospective cephalometric study of the effects of RME and EGA therapy in Class II deep bite patients is described and compared with the treatment effects of patients with the same malocclusion treated only by RME. MATERIALS AND METHODS: Pre and post treatment cephalometric radiographs of 47 Class II division 1 deep bite growing patients treated with RME followed by EGA (mean age 9.65 years) (Group 1) were compared with those obtained from a control group (Group 2) of 44 patients (mean age 9.34 years) treated with RME only. The following cephalometric values were analized: SNA; SNB; ANB; SN-PNS.ANS; SN-Go.GN; N-Me; S-Go. RESULTS: Improvement in maxillo-mandibular relationship was observed in both groups with significantly higher decrease of SNA and ANB in group 1. The cranio-maxillary relation shows a tendency to grow downward and backward in both groups. Both anterior and posterior total facial heights showed a significant increase in group 1. CONCLUSIONS: RME followed by EGA therapy in Class II skeletal deep bite patients has shown better results compared with RME therapy without functional appliance.


Assuntos
Má Oclusão de Angle Classe II , Cefalometria , Criança , Humanos , Mandíbula , Maxila , Estudos Retrospectivos
5.
Eur J Paediatr Dent ; 20(4): 330-334, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31850779

RESUMO

SEC III protocol: Early treatment of dentoskeletal Class III malocclusions. The early treatment of dentoskeletal Class III malocclusion is one of the more challenging situations for orthodontists, mainly for the uncertainty of stable long-term results due to the interaction of both environmental and genetic aetiological factors. Several interceptive protocols have been proposed during the past decades. The SEC III protocol includes two occlusal acrylic Splints combined with Class III elastics and chin cup. The protocol was proposed to facilitate Class III dentoskeletal correction by eliminating the intercuspation and the tongue thrust with clockwise mandibular rotation and minimal dentoalveolar compensation. The main difference with all the other appliances is the vertical control, which is crucial in difficult cases such as hyperdivergent Class III malocclusions.


Assuntos
Má Oclusão de Angle Classe III , Má Oclusão , Ortodontia , Cefalometria , Criança , Aparelhos de Tração Extrabucal , Humanos , Mandíbula , Ortodontia Corretiva , Ortodontia Interceptora
6.
Indian J Dent Res ; 30(5): 716-721, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31854362

RESUMO

Aim: This study was conducted aiming to optimize the selection of bar material that can minimize stresses on mandibular bone. Subjects and Methods: One finite-element model was created under ANSYS environment to evaluate the use of different materials as a bar-manufacturing material in mandibular implant-supported overdenture (OD). Model components were created on engineering computer-aided design software and then assembled under the finite-element package. A force of 200 N was unilaterally and vertically applied on the left second premolar area. Results: Within these study conditions, the polyether ether ketone bar produced the lowest Von Mises stress on OD and the maximum value of deformation. Stainless steel bar produced the maximum OD total deformation. Conclusions: Cortical and spongy bones are not sensitive to the bar material. Increasing bar material stiffness increases Von Mises stresses in the bar itself and reduces its total deformation, in what is called overconstrained system.


Assuntos
Implantes Dentários , Revestimento de Dentadura , Prótese Dentária Fixada por Implante , Análise do Estresse Dentário , Retenção de Dentadura , Análise de Elementos Finitos , Mandíbula , Estresse Mecânico
7.
Indian J Dent Res ; 30(5): 722-730, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31854363

RESUMO

Introduction: The number of women with osteoporosis i.e. with reduced bone mass and disruption of bone architecture, is increasing in India due to severe deficiency of Vitamin D. It has been reported throughout the country in urban and rural post-menopausal women. Vitamin D synthesis is affected by geographical location, atmospheric pollution, clothing, melanin pigmentation and sunlight exposure. Moreover, ageing is also associated with decreased vitamin D synthesis. Vitamin D deficiency is the most underdiagnosed medical condition in postmenopausal woman. Objective: Therefore, this study was planned to estimate and to evaluate alveolar bone mass using radio morphometric indices in postmenopausal women and its correlation with serum vitamin D3. Materials and Methods: We conducted a study comprising of a study group of 60 post-menopausal women, divided into 2 sub-groups, each group comprising of 30 individuals, depending on their occupation and domicile. Blood samples were taken to evaluate serum vitamin D3 level. Also, panoramic radiographs of all the study subjects were recorded for evaluation of 3 radio morphometric indices viz. mandibular cortical index (MCI), mental index (MI), and panoramic mandibular index (PMI). Results: Statistical analysis revealed higher significant values in rural than in urban postmenopausal woman. Conclusions: A high overall prevalence (90%) of vitamin D deficiency was also observed in the study subjects.


Assuntos
Osteoporose Pós-Menopausa , Densidade Óssea , Colecalciferol , Feminino , Humanos , Índia , Mandíbula , Pós-Menopausa , Radiografia Panorâmica
8.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 37(6): 684-686, 2019 Dec 01.
Artigo em Chinês | MEDLINE | ID: mdl-31875452

RESUMO

Double-root mandibular third molars are the common types of mandibular third molars that are prone to impac-tion. Based on the summary of clinical cases and experience, the commonly used crown-root separation technique is improved as diagonal root separation technique that divides the roots by the line connecting the distal axis angle to the root furcation. This new method improves the efficiency of the operation and reduces surgical trauma. This paper details the surgical method, minimally invasive mechanics, and key points of this technique, compares the technique with the crown-root separation tech-nique, and discusses their joint applications.


Assuntos
Dente Serotino , Dente Impactado , Humanos , Mandíbula , Dente Molar , Raiz Dentária
9.
Chin J Dent Res ; 22(4): 241-249, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31859284

RESUMO

OBJECTIVE: To evaluate and quantify the prevalence and morphology of the mandibular incisive canal (MIC) comparatively among healthy, periodontitis and edentulous mandibles using cone-beam computed tomography (CBCT). METHODS: CBCT images of 1,070 hemimandibles from 535 consecutive patients, including 448 with healthy dentition, 42 with severe periodontitis mandibles and 45 with edentulous mandibles, were retrospectively analysed. MICs were identified, and linear measurements were performed. Statistical analyses were conducted to investigate differences in the prevalence and morphology of MICs relative to gender, laterality, age group and dental status. RESULTS: The MIC was observed in 92.8% of 1,070 hemimandibles. No significant differences of MIC prevalence were found between left and right sides, or between healthy and periodontitis mandibles. However, males had a higher prevalence of MIC than females, and patients with dentate mandibles had a higher prevalence of MIC than those with edentulous mandibles. For dentate mandibles, MICs started most commonly below the first premolar (51.9%) and ended around the canine (58.5%). The mean diameter of MIC was 2.5 ± 0.5 mm at origin, and 20.6% of MICs began with a diameter of ≥ 3 mm. The mean length of MIC was 13.4 ± 3.3 mm. The mean distances from the MIC to the labial cortex, lingual cortex, alveolar ridge and inferior border of mandible were 3.7 ± 0.9, 5.1 ± 1.6, 19.5 ± 3.8 and 8.9 ± 1.7 mm, respectively. Moreover, significant differences of measurements were found relative to gender, age group, and dental status. CONCLUSION: Due to the large variations in size and course of MICs, special caution should be exercised in any individual surgery affecting the anterior mandible.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Periodontite , Feminino , Humanos , Masculino , Mandíbula , Prevalência , Estudos Retrospectivos
10.
Medicine (Baltimore) ; 98(51): e18339, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31860988

RESUMO

Mandibular distraction osteogenesis (MDO) is an effective treatment for tongue-based airway obstruction in infants with severe Pierre Robin sequence (PRS). Most infants receiving MDO require postoperative mechanical ventilation (MV) to assist breathing. Optimal MV time for each individual patient and factors influencing the time must be identified to guide clinical decision-making.A retrospective analysis was performed on 75 infants with PRS receiving MDO from November 2016 to August 2018. Twenty-six were females and 47 were males. Data extracted from the hospital information system included sex, age, weight, history of preterm labor, preoperative pulmonary infection, laryngomalacia/tracheomalacia, laryngoscope exposure classification, anesthesia duration, operation duration, postoperative treatment site, situation of distraction, postoperative complications and MV duration. Statistical analyses were conducted to investigate the potential associations of these factors with MV time.Seventy-three PRS syndrome patients received anesthesia for MDO device procedures were considered eligible for study. Patient sex, history of preterm labor, preoperative pulmonary infection, laryngomalacia/tracheomalacia, laryngoscopy exposure difficulty, postoperative treatment site (neonatal or pediatric intensive care unit), ventilator-associated pneumonia, age, weight, anesthesia duration, and operation duration had no significant influence on postsurgical MV time (P > .05). Amount of distraction at the time of extubation had statistically significant influence on postoperative MV time (P < .05). In addition, scatter plots revealed linear relationships between postoperative MV time and amount of distraction at extubation.According to this analysis, amount of distraction was associated with MV time following MDO for severe PRS and roughly 6 days post-surgery is a generally safe extubation time.


Assuntos
Obstrução das Vias Respiratórias/terapia , Mandíbula , Osteogênese por Distração , Síndrome de Pierre Robin/complicações , Respiração Artificial , Extubação , Obstrução das Vias Respiratórias/etiologia , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Estudos Retrospectivos , Fatores de Tempo
11.
Autops. Case Rep ; 9(4): e2019091, Oct.-Dec. 2019. ilus, tab
Artigo em Inglês | LILACS | ID: biblio-1024295

RESUMO

Desmoplastic fibroma (DF) is a rare bone tumor, which is known to involve mostly the gnathic bones. In this setting, the clinical presentation is usually represented by a bulging tumor of the face. Radiologically, the tumor is usually characterized by an expansile lytic bone lesion. The histopathology of the tumor shows a poorly circumscribed hypocellular lesion rich in collagen fibers with interspersed spindle cells having bland nuclear chromatin. Despite the lack of mitoses and nuclear pleomorphism, DF has an aggressive nature, presenting as a destructive growth causing entrapment of neuro-vascular bundles, sinusitis, or trismus. Some cases of DF show mutations in the adenomatous polyposis coli pathway shown by nuclear localization of the ß-catenin protein. Few reports showed an association with tuberous sclerosis, though most of these cases were sporadic. We discuss a rare case of desmoplastic fibroma involving the mandible, and a review of the literature of the DF cases involving the gnathic bones.


Assuntos
Humanos , Feminino , Pré-Escolar , Neoplasias Ósseas/patologia , Fibroma Desmoplásico/patologia , Mandíbula
12.
Rev. cient. odontol ; 7(2): 141-151, jul.-dic. 2019. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1046791

RESUMO

El Síndrome de Treacher Collins es una malformación craneofacial autosómica dominante (STC) que se presenta cuando el gen TCOF1 (5q32-q33.1) sufre una mutación. Su incidencia se estima en 1/50,000 nacidos y presenta manifestaciones en tejidos blandos y duros. Métodos: Seis individuos diagnosticados con STC, remitidos de la Asociación Treacher Collins México AC, para la realización de estudios imagenológicos prequirúrgicos. Objetivo: Describir las características clínicas, radiográficas y morfométricas de individuos con esta condición. Resultados: No existen suficientes estudios en los cuales se determinen patrones específicos en un mismo individuo, e incluso cuando se comparan entre sí, por lo que es necesario establecer protocolos para su manejo. Conclusiones: Las características clínicas del individuo con STC varían de acuerdo con la severidad de expresión genética, las cuales se pueden corroborar con fotografías, imágenes radiográficas y medidas morfométricas que nos orientaran en el manejo y planeación del tratamiento. (AU)


Treacher Collins Syndrome is a craniofacial, autosomal dominant, severe and complex malformation that occurs when the TCOF1 (5q32-q33.1) gene suffers a mutation. Its incidence is estimated at 1/50,000 births and shows manifestations in soft and hard tissues. Methods: Six individuals whit TCS diagnosis refer from Asociacion Treacher Collins México AC to do a pre-surgical imaging studies. Objective: Describe the clinical, radiographic and morphometric characteristics of individuals with this condition. Results: There are not enough studies that may establish specific patterns in the same individual and even when compared to each other, so it is necessary to establish protocols for their management. Conclusions: The clinical characteristics of the individual with TCS vary according to the severity of genetic expression, which can be corroborated with photographs, radiographic images and morphometric measurements that will guide us is the management and planning of treatment. (AU)


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Diagnóstico Clínico , Tomografia Computadorizada de Feixe Cônico , Mandíbula/anormalidades , Disostose Mandibulofacial
13.
J Contemp Dent Pract ; 20(10): 1151-1158, 2019 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-31883249

RESUMO

AIM: The aim of the study was to compare and evaluate the clinical efficacy of a microfilled pit and fissure sealant and a nanofilled pit and fissure sealant at 3, 6, and 12 months of interval. MATERIALS AND METHODS: Samples consisting of 55 healthy 8- to 12-year-old children with deep pits and fissures in mandibular first permanent molars were selected for the study. It was a split mouth design and randomized clinical trial. A total of 110 mandibular first molars were divided into two groups of 55 each: group I Fissurit FX sealant and group II Grandioseal nanofilled fissure sealant. The sealed teeth were clinically evaluated at 3, 6, and 12 months of interval to assess marginal adaptation, sealant retention, fissure caries development, roughness of sealant surface, and change of color around the sealant. RESULTS: The results showed that both Fissurit FX and Grandioseal pit and fissure sealants were effective in preventing dental caries. Marginal adaptation was significantly better with Fissurit FX when compared to Grandioseal pit and fissure sealant. There was no difference in sealant retention between the two groups. The surface roughness of Fissurit FX was high when compared to that of Grandioseal. Statistical analysis was done using the Chi-squared test for intra-group comparison and Fisher's exact test for inter-group comparison. Results were considered statistically significant if p ≤ 0.05. CONCLUSION: Fissurit FX and Grandioseal pit and fissure sealants provided similar caries preventive effects and there was no difference in retention of sealants over a period of 1 year. However, surface roughness was better with Grandioseal fissure sealants. CLINICAL SIGNIFICANCE: This study is significant because there is limited evidence about the efficacy of nanofilled pit and fissure sealants in vivo. It will also provide dental practitioners an insight into the clinical efficacy of nanofilled pits and fissure sealant when compared to micro-filled sealant enabling them to make the right choice for the betterment of their dental practice. How to cite this article: Smitha M, Paul ST, Nagaraj T, et al. Comparison and Clinical Evaluation of Two Pit and Fissure Sealants on Permanent Mandibular First Molars: An In Vivo Study. J Contemp Dent Pract 2019;20(10):1151-1158.


Assuntos
Cárie Dentária , Selantes de Fossas e Fissuras , Criança , Humanos , Lábio , Mandíbula , Dente Molar
14.
J Indian Soc Pedod Prev Dent ; 37(4): 405-408, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31710017

RESUMO

Early correction of anterior crossbite in the primary dentition can encourage proper growth and development of the maxilla and mandible, reducing the need for future orthodontic therapy. Correction is typically initiated after the age of 3 when a fixed or removable appliance can be fabricated and worn. This case study describes an instance of exceptionally early intervention without the use of an appliance. A bottle-fed 10-month-old boy presented with anterior crossbite, and a contributing factor may have been the position of the bottle's nipple during feeding. Correction of the anterior crossbite was achieved in 5 months by changing the bottle position to a counterbalancing angle. Although this technique warrants further investigation, it has the potential to reduce the need for and length of future procedures.


Assuntos
Dentição Mista , Má Oclusão , Humanos , Lactente , Masculino , Mandíbula , Maxila , Dente Decíduo
15.
Zootaxa ; 4629(3): zootaxa.4629.3.9, 2019 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-31712514

RESUMO

This study describes a new genus and new species of Tanaidacea that was collected from inside the tests of dead Tetraclita barnacles in Singapore. Xenosinelobus n. gen. is most similar to Sinelobus but can be distinguished by the (1) unusually short antennal fifth article, (2) tooth-like lacinia mobilis on right mandible, (3) long terminal seta on epignath, (4) plumose inner seta near dactylus insertion on cheliped propodus, (5) spiniform seta on pereopod 1 coxa, (6) presence of setae on inner margins of pereopod 1 propodus and dactylus, (7) claw-like terminal articles on pereopods 2 and 3, (8) row of setulose and flattened denticulate setae along distal margin of pereopod 6 propodus, (9) dorsal seta on claws of pereopods 4-6, (10) complete row of dorso-transverse setae on pleonites 1 and 2, (11) one seta on pleopod basis outer margin, (12) two or three setae on pleopod endopod inner margin and (13) three-articled uropod with final article 1.6 times as long as preceding article. A new diagnosis and key to genera is provided for the subfamily Sinelobinae.


Assuntos
Thoracica , Animais , Crustáceos , Mandíbula , Singapura
16.
Zootaxa ; 4629(1): zootaxa.4629.1.3, 2019 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-31712532

RESUMO

Aethiopella Handschin, 1942 as other Pseudachorutinae (Neanuridae) presents a diagnosis with overlapping characters when compared to other similar genera, especially Halachorutes Arlé, 1966, Ceratrimeria Börner, 1906 and Pseudachorutes Tullberg, 1871. This condition, combined to several gaps on the knowledge of described species and a wide range of morphological differences within the genus, reinforces the need of its revision, since it can be an artificial group. In spite of that, a new species, Aethiopella ricardoi sp. nov., is described and illustrated. It resembles the other five Neotropical taxa of Aethiopella but is unique by the combination of fourth antennal segment with trilobed apical bulb and 7 dorsal sensilla, lack of dorsolateral S-microchaeta (ms); postantennal organ with 13-19 vesicles; mandibles with 7-8 teeth; maxillae apically hooked; and tibiotarsi I-III with 19/19/18 chaetae, respectively, with M chaeta slightly basally displaced. We also present an updated diagnosis of Aethiopella based on current knowledge of Pseudachorutinae, a table comparing all species, a key to Neotropical taxa and remarks on the genus.


Assuntos
Artrópodes , Estruturas Animais , Animais , Mandíbula , Tamanho do Órgão , Raízes de Plantas
17.
Oral Maxillofac Surg ; 23(4): 465-472, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31673817

RESUMO

PURPOSE: The purpose of this study was to evaluate potential differences in volumes of areas of osteolysis caused by medication-related osteonecrosis of the jaw (MRONJ) between the upper and lower jaw. We aim to analyze the clinical relevance of volumetric measurement of osteolytic lesions for surgical planning of MRONJ patients. METHODS: Sixty-seven patients who were clinically and histopathologically diagnosed with MRONJ were retrospectively included in this study. Cone beam computed tomography (CBCT) images were evaluated according to localization, affected anatomical structures, and volumetric measurement of osteolytic lesions caused by MRONJ in appliance of CBCT datasets by using ITK-SNAP. RESULTS: The most frequently affected localization is the mandible, whereas female patients show significantly more often lesions of the maxilla. The cortical bone was predominantly affected. Furthermore, the affection of teeth, sinus floor, inferior alveolar nerve canal, or even a pathological fracture of the mandible are infrequently existing. The volumetric measurements revealed a statistically significant greater absolute osteolysis volume in males. CONCLUSIONS: Image analysis and volumetric measurements of osteolytic lesions of MRONJ patients is a helpful tool to further understand the clinical appearance and identify compromised anatomic landmarks. Volumetric analysis aids in pre-surgical planning and visualizes the individual extent of the disease for each patient.


Assuntos
Osteonecrose da Arcada Osseodentária Associada a Difosfonatos , Levantamento do Assoalho do Seio Maxilar , Tomografia Computadorizada de Feixe Cônico Espiral , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Masculino , Mandíbula , Estudos Retrospectivos
18.
Georgian Med News ; (294): 145-150, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31687968

RESUMO

The main aim is to find out the mechanisms of reparative regeneration of bone tissue in artificially created transverse mandibular defects in rats when applying osteoplastic materials based on hydroxyapatite and polylactide with different component percentage. Experimental studies were carried out on 114 mature laboratory white male 180-220 g rats that were divided into groups: control group - animals whose bone defect was filled only with a blood clot; 1st experimental group - the entire defect volume was densely filled with a block with the ratio of component parts, hydroxyapatite 80% + polylactide 20%; 2nd experimental group was similar, but with the ratio of 50% + 50%. Morphological and morphometric research methods were carried out after the removed jaws had been decalcized in a 10% nitric acid solution. An x-ray study was performed using an Intra digital radiograph (Planmeca, Finland). Statistical analysis of the results was carried out according to the standard method of descriptive statistics using the software package "StatSoftStatistica 10". The use of osteoplastic material with a longer period of its biodegradation contributes to filling the defect with bone tissue, but slows down the processes of the final formation of a mature secondary bone scar, yet allows even with hypercorrection to restore the anatomical form of the lost area. Therefore, the use of this material is recommended for a defect in the alveolar ridge, mainly in extraction sockets, when one needs to avoid atrophy and to create conditions for prosthetic treatment. Osteoimplant with a faster biodegradation period allows structuring collagen fibers in the regenerate in the early stages of healing, which optimizes the formation of an organic bone matrix and promotes its faster mineralization. Therefore, such bone substitutes can be better used for insignificant defects or when the restoration of the anatomical form is not essential, mainly for defects of the body and mandibular branches.


Assuntos
Perda do Osso Alveolar/tratamento farmacológico , Materiais Biocompatíveis/uso terapêutico , Regeneração Óssea/efeitos dos fármacos , Substitutos Ósseos/farmacologia , Mandíbula/patologia , Poliésteres/farmacologia , Perda do Osso Alveolar/cirurgia , Animais , Substitutos Ósseos/uso terapêutico , Durapatita , Masculino , Mandíbula/cirurgia , Ratos , Cicatrização
19.
Stomatologiia (Mosk) ; 98(5): 32-45, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31701927

RESUMO

The purpose of the study was to increase the effectiveness of surgical treatment and rehabilitation of patients with severe mandibular atrophy by means of autogenous free vascularized fibula transplant use with subsequent dental implants placement in the reconstructed mandible and implant-retained fixed dentures. In 2017 5 female patients underwent surgical treatment of severe mandibular atrophy with autogenous free vascularized fibula transplant in Maxillofacial Surgery department of CRID with additional nonvascularized iliac bone grafts and functional rehabilitation with implant-supported constructions in two of the cases. Due to its form, length and vascularization fibular bone represents a good plastic material for full length mandibular alveolar part reconstruction. The inclusion of the skin paddle in the autogenous free vascularized fibula transplant promotes secure primary closure of the surgical wound in the oral cavity. The use autogenous free vascularized fibula transplant in patients with severe mandibular atrophy with demands a thorough presurgical planning and intraoperative modeling.


Assuntos
Reconstrução Mandibular , Procedimentos Cirúrgicos Reconstrutivos , Atrofia , Autoenxertos , Transplante Ósseo , Feminino , Fíbula , Humanos , Mandíbula , Resultado do Tratamento
20.
Stomatologiia (Mosk) ; 98(5): 46-49, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31701928

RESUMO

AIM: To assess the efficacy and safety of mandibular block performed by two different techniques. MATERIAL AND METHODS: The study involved 92 patients divided in two groups according to mandibular block technique: method of P.M. Egorov (45 patients) and G. Gow-Gates modified by S.A. Rabinovich and O.N. Moskovets in 1999 (47 patients). RESULTS: The number of local complications was reduced to 1/9% when modified Gow-Gates mandibular block technique was used with anesthesia efficacy of 98%. CONCLUSION: Modified Gow-Gates mandibular block technique shows better efficacy and is associated with lower complications rate for oral surgical procedures and inflammatory oral diseases treatment in mandible.


Assuntos
Anestesia Dentária , Bloqueio Nervoso , Procedimentos Cirúrgicos Bucais , Humanos , Mandíbula , Nervo Mandibular
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