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1.
J Anim Sci ; 99(1)2021 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-33523183

RESUMEN

The objective of this study was to investigate the effects of processing index (PI) of barley grain and dietary undigested neutral detergent fiber (uNDF) concentration on dry matter (DM) intake, chewing activity, ruminal pH and fermentation characteristics, total tract digestibility, gastrointestinal barrier function, and blood metabolites of finishing beef heifers. The PI was measured as the density after processing expressed as a percentage of the density before processing, and a smaller PI equates to a more extensively processed. Six ruminally cannulated heifers (average body weight, 715 ± 29 kg) were used in a 6 × 6 Latin square design with three PI (65%, 75%, and 85%) × 2 uNDF concentration (low and high; 4.6% vs. 5.6% of DM) factorial arrangement. The heifers were fed ad libitum a total mixed ration consisting of 10% barley silage (low uNDF), or 5% silage and 5% straw (high uNDF), 87% dry-rolled barley grain, and 3% mineral and vitamin supplements. Interactions (P < 0.01) of PI × uNDF were observed for DM intake, ruminating and total chewing time, and DM digestibility in the total digestive tract. Intake of DM, organic matter (OM), starch, and crude protein (CP) did not differ (P > 0.14) between low and high uNDF diets, but intakes of NDF and acid detergent fiber were greater (P = 0.01) for high uNDF diets regardless of barley PI. Heifers fed high uNDF diets had longer (P = 0.05) eating times (min/d or min/kg DM) and tended (P = 0.10) to have longer total chewing times (min/kg DM) than those fed low uNDF diets. Additionally, heifers sorted (P = 0.01) against long particles (>19 mm) for high uNDF diets but not for low uNDF diets. Altering PI of barley grain did not affect (P > 0.12) total volatile fatty acid (VFA) concentration, molar percentages of individual VFA, or duration of ruminal pH < 5.8 and <5.6. Total VFA concentration was less (P = 0.01), acetate percentage was greater (P = 0.01), and duration of ruminal pH < 5.8 and <5.6 was less (P = 0.05) for high compared with low uNDF diets. Digestibility of DM, OM, and CP was greater (P = 0.02) for low vs. high uNDF diets with PI of 65% and 75%, with no difference between low and high uNDF diets at PI of 85%. Blood metabolites and gastrointestinal tract barrier function were not affected (P ≥ 0.10) by the treatments. These results suggest that increasing dietary uNDF concentration is an effective strategy to improve ruminal pH status in finishing cattle, regardless of the extent of grain processing, whereas manipulating the extent of barley processing did not reduce the risk of ruminal acidosis.


Asunto(s)
Bovinos/metabolismo , Fibras de la Dieta/metabolismo , Digestión/fisiología , Hordeum , Rumen , Alimentación Animal/análisis , Fenómenos Fisiológicos Nutricionales de los Animales , Animales , Bovinos/fisiología , Dieta/veterinaria , Fibras de la Dieta/administración & dosificación , Femenino , Fermentación , Concentración de Iones de Hidrógeno , Masticación , Nutrientes , Rumen/química , Rumen/metabolismo
2.
Niger J Clin Pract ; 24(2): 220-224, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33605912

RESUMEN

Objective: The objective was to in-vitro evaluate the mode of failure of abutments supporting fixed partial dentures (FPDs) via different retention techniques. Materials and Methods: Thirty-six implants with diameter and length of 4.5 and 13 mm, respectively, were used to prepare 18 samples of FPDs. Based on the variations on abutment's design, the FPDs were divided into three groups: Group A is cement-based retention; Group B is screw-based retention; and Group C is multiunit screw-based retention. Using a chewing simulator, cyclic loads of 1,250,000 load cycles with the load of 70N were applied on all samples to simulate 5 years of human functional chewing. The samples were loaded until failure using an electromechanical test machine. Sample-size estimation was done and fracture-load values were recorded as means and corresponding standard deviations; and group comparisons were done using one-way analysis of variance and Tukey's post hoc tests. A P value below 0.01 was nominated as an indicator of statistical significance. Results: In total, 36 samples (12 implant-abutment connections per group) were assessed. Abutment bending was observed in 6 (50%), 6 (50%) and 6 (50%) samples in groups A, B and C, respectively. De-attachment of the FPD form the abutment occurred in 5 (41.7%) and 5 (41.7%) samples in groups A and C, respectively. Screw fracture and fracture of FPD at the connector side occurred in 1 (8.3%) and 1 (8.3%) sample in groups A and C, correspondingly. Failure of the FPD was more often encountered in groups A (100%) and C (100%), compared to group B (50%). Conclusion: All abutments underwent failures under cyclic loading with abutment bending being the most common failure mode. Cement- and multi-screw-supported abutments fail more often than screw-supported abutments.


Asunto(s)
Dentadura Parcial Fija , Diente , Pilares Dentales , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Análisis del Estrés Dental , Humanos , Masticación , Ensayo de Materiales
3.
Food Chem ; 339: 128078, 2021 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-33152871

RESUMEN

The purpose of this work was to characterize the dynamic texture perception and study the mechanisms occurring in bolus from chewing to swallowing during white bread oral processing. Results indicated that the microstructural and chemical composition properties determined the oral processing behaviors. At the initial stage of oral processing, the roughness, hardness, and dryness perception were the dominant attributes. At the end of oral processing the adhesiveness and softness perception were dominant, which correlated to the higher bolus water content and adhesive properties. The softness and adhesiveness perception were the key factors that trigger swallowing. In vitro artificial mastication experiments confirmed that mucin rapidly increased the adhesive force of bolus at the initial stage of oral processing, whereas α-amylase gradually increased the adhesive force. These results can help to better understand the dynamic texture perception and its change mechanisms during oral processing.


Asunto(s)
Pan , Deglución , Masticación , Sensación , Adhesividad , Dureza , Humanos , Triticum
4.
Vasc Endovascular Surg ; 55(1): 64-68, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-32862800

RESUMEN

First bite syndrome (FBS) is a sharp unilateral pain in the vicinity of the angle of the mandible after taking the first bite of a meal that presents typically after surgery in the area of the ipsilateral parapharyngeal space. It is not confirmed what the pathophysiology is that causes this pain, but the proposed mechanism is the iatrogenic damage of sympathetic fibers that extend from the superior cervical ganglion (SCG) to innervate the parotid gland. The presentation of this syndrome has been acknowledged in patients who have undergone head and neck tumor resections, but it has not been documented in the same thorough manner among vascular surgery cases in the parapharyngeal space, possibly because of a higher risk of development in other head and neck surgeries, or to under-reporting of cases. To date, only 5 cases of FBS status post carotid endarterectomy have been documented in the literature. Definitive treatment of FBS has not been established. Some studies have shown improvement with amitriptyline, and carbamazepine as well as botulinum toxin injections. We will present the case of a 75 year old male who developed first bite syndrome after a right carotid endarterectomy with efforts of raising awareness of a potential acute complication of carotid endarterectomy.


Asunto(s)
Estenosis Carotídea/cirugía , Endarterectomía Carotidea/efectos adversos , Dolor Facial/etiología , Masticación , Glándula Parótida/inervación , Traumatismos de los Nervios Periféricos/etiología , Ganglio Cervical Superior/lesiones , Anciano , Analgésicos/uso terapéutico , Estenosis Carotídea/diagnóstico por imagen , Dolor Facial/diagnóstico , Dolor Facial/tratamiento farmacológico , Dolor Facial/fisiopatología , Humanos , Masculino , Traumatismos de los Nervios Periféricos/diagnóstico , Traumatismos de los Nervios Periféricos/tratamiento farmacológico , Traumatismos de los Nervios Periféricos/fisiopatología , Resultado del Tratamiento
5.
PLoS One ; 15(12): e0243495, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33320876

RESUMEN

The maintenance of postural balance can be influenced by the lifestyle of a population. This study aimed to determine the electromyographic activity of the masseter and temporalis muscles during mandibular tasks and habitual and non-habitual chewing in indigenous individuals to reveal the differences among white Brazilian individuals. Sixty Brazilians (18 and 28 years) were divided into two groups: 30 Xingu indigenous individuals and 30 white Brazilian individuals, with 20 men and 10 women in each group. The individuals were assessed using the normalized electromyographic activity of mandibular tasks (rest, protrusion, right and left laterality) and electromyographic activity of masticatory cycles in habitual (peanuts and raisins) and non-habitual (Parafilm M) chewing. Data were analyzed using Student's t-test (p < .05). Comparisons between the groups demonstrated significant differences. Indigenous individuals group presented a decrease in the normalized electromyographic activity of the masticatory muscles during mandibular rest [right masseter (p = .002) and left masseter (p = .004) muscles]. There was increase in the normalized electromyographic activity during protrusion [left temporal (p = .03) muscle]. There was increase in the electromyographic activity during chewing: peanuts [right masseter (p = .001), left masseter (p = .001) and right temporal (p = .01) muscles], raisins [right masseter (p = .001), left masseter (p = .002), right temporal (p = .008), left temporal (p = .01) muscles] and Parafilm M [left masseter muscle (p = .05)]. From the findings of this study, we concluded that in the comparison between indigenous and white individuals, positive changes were observed in the electromyographic pattern of the masticatory muscles in the mandibular postural conditions, with greater masticatory efficiency in the indigenous group.


Asunto(s)
Electromiografía , Músculo Masetero/fisiología , Músculo Temporal/fisiología , Adolescente , Adulto , Brasil , Femenino , Humanos , Pueblos Indígenas , Masculino , Masticación/fisiología , Adulto Joven
6.
Artículo en Inglés | MEDLINE | ID: mdl-33371399

RESUMEN

Mortality is obviously intended for epidemiological studies of community-dwelling older adults. There are several health-related factors associated with nutritional status and mortality. The aim of this study was to elucidate the risk factor for mortality in community-dwelling oldest-older adults at the age of 90 and clarify the structure of health-related factors associated with mortality. A 10-year follow-up study was performed for 93 subjects at the age of 90. The mean and median of their survival days were 2373 and 2581 days for women, and 1694 and 1793 days for men. By Cox's proportional hazards model, health-related factors associated with mortality were self-assessed for chewing ability, activities of daily living (ADLs), serum albumin, total cholesterol, serum creatinine, and gripping power for women but not for men. These factors interacted with each other, and the association of these factors was different in women and men. Self-assessed chewing ability was a powerful risk factor for mortality in women at the age of 90. It acted independently from nutritional status. For older adults, addressing healthy food choices together with improved oral functions is useful. However, risk factors for mortality may depend on the life stage of subjects. To investigate the risk factor for the mortality, the life course approach is necessary.


Asunto(s)
Actividades Cotidianas , Vida Independiente , Mortalidad/tendencias , Anciano , Femenino , Estudios de Seguimiento , Humanos , Masculino , Masticación , Factores de Riesgo
7.
Artículo en Inglés | MEDLINE | ID: mdl-33374152

RESUMEN

This study examined the prevalence of self-perceived chewing discomfort depending on the type of dental prosthesis used in South Korean adults. The subjects were 12,802 people over 20 years of age who participated in a health interview and dental examination. Chewing discomfort was examined using a self-assessed report with a structured questionnaire. Using multivariable logistic regression analysis, adjusted odds ratios were evaluated along with their 95% confidence intervals (α = 0.05). After adjusting for covariates, including age, gender, smoking, drinking, hypertension, diabetes, body mass index, education, income, and toothbrushing frequency, the odds ratios (95% confidence intervals) for chewing discomfort in groups without a dental prosthesis, with fixed dental prostheses, with removable partial dentures, and with removable complete dentures were 1 (reference), 1.363 (1.213-1.532), 2.275 (1.879-2.753), and 2.483 (1.929-3.197), respectively. The association between the prevalence of chewing discomfort and the type of dental prosthesis used was statistically significant even after adjusting for various confounders (p < 0.0001). The type of dental prosthesis was related to chewing discomfort among South Korean adults.


Asunto(s)
Dentadura Completa , Dentadura Parcial Removible , Masticación , Dolor/etiología , Adulto , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Salud Bucal , República de Corea
8.
Swiss Dent J ; 130(9): 668-675, 2020 Sep 07.
Artículo en Inglés | MEDLINE | ID: mdl-32869964

RESUMEN

Assessment of mandibular mobility is an integral part of many dental examinations. Yet, information on the maximum range of mandibular motion in large groups of patients with temporomandibular disorders (TMDs) is limited. Therefore, we analyzed the corresponding data of 500 TMD patients who had presented at the University Center for Dental Medicine Basel. All measurements had been carried out by one examiner. The average maximal values for unassisted jaw opening, protrusion, and movement to the right and left were 49.3 mm (SD: 9.1), 8.8 mm (SD: 2.3), 9.4 mm (SD: 2.5), and 11.8 mm (SD: 3.1), respectively. Since activities such as chewing, talking, oral hygiene or even yawning require neither very wide openings nor extensive lateral or protrusive excursions, we would like to propose the following general threshold values for impaired mandibular function: maximum interincisal distance < 30 mm; maximum laterotrusion as well as maximum protrusion < 5 mm. These cut-off values, which are lower than those traditionally suggested in the dental literature, appear to be sufficient to carry out functionally undisturbed mandibular movements. By lowering the traditionally higher thresholds, the spectrum of anatomical and functional variability is increased. In this way, patients and non-patients may be protected against medicalization, overdiagnosis, and overtreatment.


Asunto(s)
Trastornos de la Articulación Temporomandibular , Humanos , Mandíbula , Masticación , Movimiento , Rango del Movimiento Articular , Articulación Temporomandibular
9.
Clin Ter ; 171(5): e414-e420, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32901785

RESUMEN

OBJECTIVE: Surface Electromyography of masticatory muscles (sEMG) is used as a tool to support diagnosis and treatment of Temporomandibular disorders (TMDs). The study aimed at examining jaw muscles pattern in individuals with temporomandibular joint disc displacement with reduction (TMJ/DDR). This sort of subjects was supposed to have a different muscular pattern compared to the control group. MATERIALS AND METHODS: Sixty-four women with unilateral TMJ/DDR and forty TMD-free women underwent a sEMG assessment of masticatory muscles. Descriptive statistics were performed. Student T-Test assessed differences between the two groups. Statistical significance was set at ρ < 0.05. RESULT: The t-test showed statistically significant results only in BAR and SMI scores (ρ value < 0,0001). The other measurements did not differ between the two groups. BAR index values of all healthy subjects were within the reference range. Almost the entire TMJ/DDR group had BAR index out of reference range and anteriorly placed. CONCLUSION: Women with TMJ/DDR showed an altered recruitment of the jaw muscles, with significant difference between the activity of the couple of temporalis and the one of masseters, compared to the control group. A lower chewing efficiency was found in the DDR group compared to the control one.


Asunto(s)
Electromiografía , Disco de la Articulación Temporomandibular/fisiopatología , Trastornos de la Articulación Temporomandibular/fisiopatología , Adulto , Electromiografía/métodos , Femenino , Humanos , Músculo Masetero/fisiopatología , Masticación , Músculos Masticadores/fisiopatología , Persona de Mediana Edad , Músculo Temporal/fisiopatología , Trastornos de la Articulación Temporomandibular/diagnóstico
10.
Tokai J Exp Clin Med ; 45(3): 152-155, 2020 Sep 20.
Artículo en Inglés | MEDLINE | ID: mdl-32901906

RESUMEN

BACKGROUND: Temporomandibular joint (TMJ) dislocation can be categorized into three groups: acute, habitual or recurrent, and long-standing. Long-standing TMJ dislocation refers to a condition that persists for more than one month without reduction. Long-standing dislocation of the TMJ is rare and the most challenging and difficult to treat of the three. CASE REPORT: The present case study relates to a 53-year-old woman with long-standing TMJ dislocation of a year's duration who presented for treatment. Due to this condition, she was unable to take food orally, and nutrition was managed by gastrostomy tube feeding. She also suffered from schizophrenia and had been admitted to a closed hospital. Bilateral mandibular condylectomy was performed, restoring oral function. However, post-reduction, an open bite remained, restricting the types of food that she could eat. Additional intermaxillary fixation and intermaxillary traction would have been required for an optimal outcome, but they were not possible for this patient. CONCLUSION: Despite an inability to provide comprehensive treatment, due to patient-related factors, occlusal and masticatory functions were restored to adequate levels following bilateral condylectomy alone. This enabled oral feeding and improved her quality of life.


Asunto(s)
Ingestión de Alimentos , Luxaciones Articulares/cirugía , Cóndilo Mandibular/cirugía , Masticación , Boca/fisiopatología , Recuperación de la Función , Articulación Temporomandibular/cirugía , Femenino , Humanos , Luxaciones Articulares/fisiopatología , Persona de Mediana Edad , Calidad de Vida , Articulación Temporomandibular/fisiopatología , Factores de Tiempo , Resultado del Tratamiento
11.
J Oral Sci ; 62(4): 387-392, 2020 Sep 26.
Artículo en Inglés | MEDLINE | ID: mdl-32893197

RESUMEN

The cause of burning mouth syndrome (BMS) is unknown. Although no effective treatment has been established, BMS patients frequently chew gum to alleviate pain. To identify the cause and new treatments for BMS, this study investigated the psychophysical and pharmacological properties of gum chewing to better understand its pain-relieving effects. In this prospective, blinded study, plasma catecholamine and serotonin levels and Profile of Mood States (POMS) scores were assessed after gum chewing or simulated chewing in 40 women (20 BMS patients and 20 age-matched controls). Visual analogue scale (VAS) scores for pain decreased significantly in BMS patients after gum chewing and simulated chewing. Moreover, resting VAS scores of BMS patients were significantly positively correlated with plasma adrenaline level. Furthermore, gum chewing was significantly correlated with lower plasma adrenaline level, VAS score, and tension-anxiety score. These results suggest that adrenaline is important in the pathogenesis of BMS pain and that the analgesic effect of gum chewing is induced through the potential effects of anxiety reduction, although this effect might not be specific to BMS. In addition, the analgesic effect of gum chewing was not induced solely by chewing motion.


Asunto(s)
Síndrome de Boca Ardiente/tratamiento farmacológico , Síndrome de Boca Ardiente/terapia , Analgésicos/uso terapéutico , Goma de Mascar , Femenino , Humanos , Masticación , Estudios Prospectivos
12.
J Oral Rehabil ; 47(12): 1511-1520, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32964471

RESUMEN

BACKGROUND: Masticatory function of institutionalised elders and its relationship with nutrition and oral health-related quality of life (OHRQoL) are unknown. OBJECTIVES: This multicentre cross-sectional study evaluated the influence of the presence of teeth and dentures on masticatory function (masticatory performance and swallowing threshold) in institutionalised elders. Correlation of masticatory function with nutrition and OHRQoL was also verified. METHODS: Older adults (n = 344; mean age (SD) = 77.70 (9.10)), selected from nursing homes in two Brazilian cities, were classified as edentulous with or without complete dentures (CDs), and partially dentate with or without prosthesis. Masticatory performance was assessed using a two-colour chewing gum. Swallowing threshold was set by the number of chewing cycles performed until swallowing 3.7 g of peanuts. Nutrition was screened by Mini-Nutritional Assessment-Short Form and body composition. OHRQoL was evaluated through Geriatric Oral Health Assessment Index (GOHAI) and Oral Health Impact Profile (OHIP-14). The Kruskal-Wallis test and Spearman's correlation were used (α = 0.05). RESULTS: Edentulous elders without CDs had lower masticatory performance than those with CDs and partially dentate with or without prosthesis (P < .05). Swallowing threshold of edentulous elders with CDs and partially dentate with prosthesis was greater than edentulous elders without CDs and partially dentate without prosthesis (P < .05). Masticatory function was not correlated with nutrition. Masticatory performance was correlated (P < .05) with GOHAI (r2  = -.154) and swallowing threshold with GOHAI (r2  = .162) and OHIP-14 (r2  = -.146). CONCLUSION: The absence of teeth and dentures negatively affected the masticatory function. Although the masticatory function was not correlated with institutionalised elders' nutrition, their OHRQoL was negatively impacted.


Asunto(s)
Salud Bucal , Calidad de Vida , Anciano , Brasil , Estudios Transversales , Humanos , Masticación , Casas de Salud , Estado Nutricional
13.
Minerva Stomatol ; 69(4): 256-268, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32945635

RESUMEN

INTRODUCTION: In this systematic review, several masticatory function parameters assessed during mandibular single-implant overdenture (SIO) use were compared to pre- SIO placement values in edentulous patients with aim of contributing to a consensus regarding denture treatment options. EVIDENCE ACQUISITION: This study was registered a priori in the PROSPERO database (CRD42018106567). Two independent reviewers carried out electronic searches in eight databases, without language or time frame limitations, to collate clinical studies comparing masticatory function of edentulous patients before versus after SIO installation with the implant placed on the mandibular midline. Risk of bias was assessed with a before-and-after tool and evidence certainty level was evaluated with the Grading of Recommendations Assessment, Development and Evaluation program. EVIDENCE SYNTHESIS: Eleven studies were included in this review (1 prospective, 3 crossover trials, 4 randomized clinical trials, 2 paired clinical trials, and 1 pilot). Enrolled patients were mostly over 60 years old; all patients were using conventional complete dentures (CD) prior to SIO installation. Masticatory performance, masticatory efficiency, bite force, and muscle activity were improved after the SIO placement compared to during mandibular CD use. Mandibular movement and masticatory ability data were inconclusive. Most of the studies had low risk of bias, but all had very low certainly level ratings due to methodological heterogeneity. CONCLUSIONS: Placement of SIO improves masticatory function, as reflected mostly by masticatory performance and efficiency data, relative to CD use. Further studies comparing dental rehabilitation options, including SIOs, are needed to improve the quality of evidence in the literature.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Humanos , Mandíbula , Masticación , Persona de Mediana Edad , Satisfacción del Paciente , Estudios Prospectivos
14.
J Oral Rehabil ; 47(12): 1496-1502, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32966643

RESUMEN

BACKGROUND: The two-colour mixing test is a quick method to assess chewing function (CF). The use of smartphone cameras for acquiring images may help in further simplifying the process. OBJECTIVE: This study evaluated the reliability of smartphone-camera images of chewing gums to assess CF. METHODS: Five test samples of a bicoloured chewing gum were produced by a single fully dentate adult volunteer. The specimens were flattened to 1-mm thick wafers. The two sides of the wafers were digitised with a conventional flatbed scanner (control) and were photographed 20 times using 8 different smartphones. The images were assessed optoelectronically to obtain the variance of hue (VoH) and subjectively by visual assessment (SA) using a categorical scale (SA1-SA5). Spearman's correlation and regression models were used for statistical analyses. RESULTS: The intra-group variability for SA1-SA3 was <1% for all smartphones, but significantly higher than controls for SA4 and SA5 (smartphone: SA4 = 5.57%; SA5 = 8.76%; control: SA4 = 2.5%; SA5 = 0.79%). VoH was progressively lower from SA1 to SA5 for all imaging devices (r > -.97; P < .001). VoH comparisons between control and smartphone images revealed significant differences for the individual SA categories, and however, the magnitude of differences was small and non-significant when the full range of SA levels were considered. The linear mixed model regression showed significant effects for all the smartphones (P < .001) and SA levels (P < .001) in relation to the flatbed scanner values. CONCLUSIONS: Smartphone cameras may be used to evaluate colour mixture for a bolus-kneading test, however, the precision is lower with higher degrees of colour mixing.


Asunto(s)
Goma de Mascar , Teléfono Inteligente , Adulto , Color , Humanos , Modelos Lineales , Masticación , Reproducibilidad de los Resultados
15.
Rev. argent. neurocir ; 34(3): 149-162, sept. 2020. ilus, graf, tab
Artículo en Español | LILACS, BINACIS | ID: biblio-1120864

RESUMEN

Introducción: Introducción: La compresión percutánea con balón (CPB) es una de las técnicas estándar para el tratamiento de la neuralgia del trigémino. El objetivo de este estudio es evaluar la eficacia de la compresión percutánea con balón (CPB) del ganglio de Gasser y raíz trigeminal en el tratamiento de la neuralgia del trigémino (TN). Métodos: Se usó un estudio observacional analítico de cohorte prospectivo. Un total de 293 pacientes con neuralgia del trigémino fueron tratados con la CPB entre octubre de 2008 y octubre de 2019 en Lima, Perú. Los datos fueron obtenidos de los registros hospitalarios y entrevistas. La CPB se realizó bajo sedación con propofol y remifentanilo. Se administróoxígeno a través de cánula nasal y se monitorizó la frecuencia cardíaca y la presión arterial durante todo el procedimiento. Elprocedimiento se realizó usando fluoroscopia con arco en C para facilitar la introducción de la aguja 14 G hasta que se ingresaal agujero oval y la visualización del catéter Fogarty 4F inflado en el cavum de Meckel. En la posición correcta, generalmenteaparece claramente definido una forma de pera o de reloj de arena después de la inyección de 0.5-1 ml de material decontraste. Resultados: La edad media fue de 64.2 años (rango 27-90). Treinta y seis pacientes (12%) tuvieron otros procedimientosquirúrgicos previos. Doscientos sesenta y dos pacientes (89.4%) experimentaron un alivio inmediato de la neuralgia despuésdel procedimiento. Se obtuvo un balón con forma de pera en 162 casos (55.3%), reloj de arena 73 (24.9%) y oval 58 (19.8%). En 245 pacientes (83.6%) el balón se mantuvo inflado durante 60 - 90 segundos. Es crucial obtener una forma de pera o de reloj de arena porque este es probablemente el factor más importante para obtener un buen alivio del dolor y duradero. Todo el procedimiento dura unos 15 minutos. La hipoestesia hemifacial después del procedimiento fue moderada o severa en el 76.5% de los pacientes. A los tres meses, la mayoría de los pacientes tienen una recuperación significativa en la sensibilidad facial, que continúa recuperándose con el tiempo. Todos los pacientes tuvieron alguna dificultad transitoria para masticar en el lado afectado. Se observó recurrencia en 26 pacientes (9.2%) en un tiempo de seguimiento de 6 meses a 11 años (5.75 años). La forma más común de balón asociada con recurrencia fue la oval (65.4%).Conclusiones: La CPB es técnicamente simple, bien tolerada por los pacientes. La tasa de éxito de la operación es alta. Los pacientes con balón en forma de pera o de reloj de arena obtuvieron los mejores resultados.


Introduction: Percutaneous balloon compression (PBC) is one of the standards techniques for the treatment of trigeminal neuralgia.The objective of this study is to evaluate the efficacy of PBC of the Gasserian ganglion and trigeminal rootlets as treatment for trigeminal neuralgia (TN). Methods: A prospective cohort analytical observational study was used. A total of 293 patients with trigeminal neuralgia were treated with PBC between october 2008 and October 2019 in Lima, Perú. The data were obtained from hospital records and interviews. PBC was performed under sedation with propofol and remifentanil. Oxygen was administered through nasal cannula and the heart rate and blood pressure were monitored throughout the procedure. The procedure is carried out with C-arm fluoroscopy to facilitate the introduction of the 14 G needle until the foramen oval is entered and the visualization of the inflated catheter Fogarty 4F in the Meckel ́s cave. Once in the right position, a clearly defined pear shape or hourglass is seen after injection of 0.5 ­ 1 mL of contrast material. Results: The mean age was 64.2 years (range, 27-90). Thirty-six patients (12%) had other previous surgical procedures. Two hundred sixty-two patients (89.4%) experienced immediate relief from neuralgia following the procedure. A pear-shaped balloon was obtained in 162 cases (55.3%), hourglass 73 (24.9%) and oval 58 (19.8%). In 245 patients (83.6%) the balloon is kept inflated for 60­90 seconds. It is crucial to obtain a pear shape or hourglass because this probably is the most significant factor for obtaining good, long-lasting pain relief. The whole procedure takes 15 minutes. Following the procedure, hemifacial hypoesthesia was moderate or severe in 76.5% of patients. Most patients have a significant recovery in facial sensitivity at three months post-procedure and continue to improve over time. All patients faced some transient difficulty chewing in the affected side. Recurrence was observed in 26 patients (9.2%) during a follow-up time of 6 months to 11 years (5.75 years). The most common form of balloon associated with recurrence was oval (65.4%).Conclusions: PBC is a technically simple, well tolerated by patients. The operation success rate is high. Patients with pear or hourglass shape balloon obtained the best results.


Asunto(s)
Humanos , Neuralgia del Trigémino , Terapéutica , Ganglio del Trigémino , Masticación , Neuralgia
17.
Geriatr Gerontol Int ; 20(10): 917-926, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32830417

RESUMEN

AIM: This large epidemiological survey of older people examined oral hypofunction and the relationship between oral hypofunction and frailty. METHODS: Participants were community-dwelling adults aged 65-85 years in Japan. The oral function evaluation included seven items (oral hygiene, oral dryness, occlusal force, tongue-lip motor function, tongue pressure, masticatory function and swallowing function), and oral hypofunction was defined as having abnormalities in at least three of these items. The frailty status was classified into three categories (robust, pre-frail and frail) according to the total Kihon Checklist score. We analyzed 978 subjects with complete data. The relationship between oral function and frailty status was analyzed using multivariate multinomial logistic regression analyses. RESULTS: Approximately 60% of the older adults had oral hypofunction. The multivariate odds ratios (ORs) for a pre-frail or frail status were significantly higher for older people with reduced occlusal force, reduced tongue-lip motor function and deteriorated swallowing function than in those without deterioration of those items. Of the oral function items, swallowing function was most strongly associated with the frailty status, and the ORs (95% confidence interval [CI]) for deteriorated swallowing function in pre-frail and frail patients were 6.4 (3.9-10.8) and 10.2 (5.4-19.1), respectively. Those with oral hypofunction had significantly higher adjusted ORs for pre-frail (OR 1.4, 95% CI 1.1-2.0) and frail (OR 2.1, 95% CI 1.2-3.5) statuses. CONCLUSION: Many community-dwelling older people have reduced oral function or oral hypofunction, which is significantly associated with frailty in older people. Geriatr Gerontol Int 2020; 20: 917-926.


Asunto(s)
Anciano Frágil/estadística & datos numéricos , Salud Bucal/estadística & datos numéricos , Higiene Bucal/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , Fuerza de la Mordida , Lista de Verificación , Estudios Transversales , Trastornos de Deglución/epidemiología , Femenino , Fragilidad , Evaluación Geriátrica , Humanos , Vida Independiente , Japón , Masculino , Masticación , Oportunidad Relativa , Encuestas y Cuestionarios , Xerostomía/epidemiología
18.
PLoS One ; 15(8): e0238036, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32853244

RESUMEN

The aging process affects the entire human body, including the stomatognathic system, and can trigger not only occlusal but also postural imbalances involving other muscular chains. Hippotherapy has been used to promote cervical, postural, and balance control in individuals with diverse impairments. The present study used electromyography to evaluate the masseter and temporal muscles in an elderly population pre- and post-hippotherapy. Participants included 17 individuals, mean age 66,5±7 years. Electromyographic recording of the bilateral masseter and temporal muscles was performed during the postural resting condition and activities that involved the active participation of these muscles in different conditions. The practitioner performed no other type of activity or exercise during the intervention because the objective is to evaluate the effect of the three-dimensional movement provided by the horse. Raw electromyographic data were tabulated using commercially available software (IBM® SPSS® Statistics 234.0) and subjected to statistical analysis, in which p ≤ 0.05 was considered to be statistically significant. Post-hippotherapy, there was lower electromyographic activity for the masseter and temporalis muscles in all the static mandibular tasks, with significant effect for time for the right temporal muscle (p = 0.038), the left temporal muscle (p = 0.028) and in the all dynamic mandibular tasks for the left temporal muscle (p = 0.025) and the left masseter muscle (p = 0.027). Hippotherapy promotes a reduction in the myoelectric activity of the masticatory muscles of elderly individuals.


Asunto(s)
Electromiografía , Terapía Asistida por Caballos , Músculo Esquelético/fisiología , Anciano , Femenino , Humanos , Masculino , Masticación/fisiología , Persona de Mediana Edad
19.
J Anim Sci ; 98(9)2020 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-32845313

RESUMEN

Periodontal disease (PD) is the most common clinical condition occurring in adult dogs. The objective of this study was to evaluate the benefits of daily dental chew administration on oral health outcomes in adult dogs. Twelve adult (mean age = 5.31 ± 1.08 yr; mean BW = 13.12 ± 1.39 kg) female beagle dogs were used in a replicated 4 × 4 Latin square design consisting of 28-d periods. On day 0 of each period, teeth were cleaned by a veterinary dentist blinded to treatments. Teeth then were scored for plaque, calculus, and gingivitis by the same veterinary dentist on day 28 of each period. Breath samples were measured for malodor (volatile sulfur compounds) on days 1, 7, 14, 21, and 27 of each period. All dogs consumed the same commercial dry diet throughout the study. Control dogs were offered the diet only (CT), while treatment groups received the diet plus one of three dental chews. Two novel chews (Bones & Chews Dental Treats [BC]; Chewy, Inc., Dania Beach, FL and Dr. Lyon's Grain-Free Dental Treats [DL]; Dr. Lyon's, LLC, Dania Beach, FL) and a leading brand chew (Greenies Dental Treats [GR]; Mars Petcare US, Franklin, TN) were tested. Each day, one chew was provided 4 h after mealtime. All tooth scoring data were analyzed using the Mixed Models procedure of SAS (version 9.4; SAS Institute, Cary, NC). Halimeter data were analyzed using repeated measures using the Mixed Models procedure of SAS and testing for differences due to treatment, time, and treatment * time interaction. Data are reported as LS means ± SEM with statistical significance set at P < 0.05. DL performed at the same level as the leading brand, GR, as both resulted in lower (P < 0.05) plaque coverage and thickness scores, calculus coverage scores, and day 27 volatile sulfur concentrations compared with CT. Additionally, DL reduced (P < 0.05) volatile sulfur compounds on day 14 when compared with CT. BC reduced (P < 0.05) calculus coverage and day 27 volatile sulfur concentrations compared with CT. Our results suggest that the dental chews tested in this study may help slow the development and/or progression of PD in dogs.


Asunto(s)
Enfermedades de los Perros , Halitosis , Animales , Enfermedades de los Perros/terapia , Perros , Femenino , Gingivitis/veterinaria , Halitosis/veterinaria , Masticación , Evaluación de Resultado en la Atención de Salud , Compuestos de Azufre
20.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi ; 37(4): 614-621, 2020 Aug 25.
Artículo en Chino | MEDLINE | ID: mdl-32840078

RESUMEN

As a representative part of the oral system and masticatory robot system, the modeling method of the dental model is an important factor influencing the accuracy of the multi-body dynamic model. Taking the right first molars of the masticatory robot as the research object, an equivalent model, point-contact higher kinematic pair composed of v-shaped surface and sphere surface, was proposed. Firstly, the finite element method was used to analyze the occlusal dynamics of the original model in three static contact cases (intrusive contact, centric occlusion, and extrusive contact) and one dynamic chewing case, and the expected bite force was obtained. Secondly, the Hertz contact model was adopted to establish the analytical expression of the bite force of the equivalent model in three static contact cases. The normal vectors and contact stiffness in the expression were designed according to the expected bite force. Finally, the bite force performance of the equivalent model in three static contact cases and one dynamic chewing case was evaluated. The results showed that the equivalent model could achieve the equivalent bite force of 8 expected items in the static contact cases. Meanwhile, the bite force in the early and late stages of the dynamic chewing case coincides well with the original model. In the middle stage, a certain degree of impact is introduced, but it can be weakened by subsequent trajectory planning. The equivalent modeling scheme of the dental model proposed in this paper further improves the accuracy of the dynamic model of the multi-body system. It provides a new idea for the dynamic modeling of other complex human contacts.


Asunto(s)
Diente Molar , Fenómenos Biomecánicos , Fuerza de la Mordida , Humanos , Masticación
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