Abstract

BACKGROUND AND OBJECTIVES: Temporomandibular disorders are highly prevalent and may impair several oral function-related aspects. This study aimed at evaluating the impact of the presence and severity of temporomandibular disorder signs and symptoms on oral health-related quality of life. METHODS:Participated in the study 135 dentistry students of the Federal University of Paraiba. The presence of temporomandibular disorder was determined by means of an anamnesis questionnaire and a summarized clinical evaluation protocol. Oral health-related quality of life was determined by the summarized Oral Health Impact Profile version translated and validated for the Portuguese language. Statistical comparisons between Oral Health Impact Profile-14 means related to the presence of temporomandibular disorder signs and symptoms were achieved with Mann-Whitney and Kruskal-Wallis tests. RESULTS: Volunteers with temporomandibular disorder (p<0.001), needing treatment (p<0.001) and higher severity (p<0.001) had higher impact on oral health-related quality of life. Volunteers with clinical temporomandibular disorder signs had further quality of life impairment, being that individuals with simultaneous muscle and joint temporomandibular disorders (p=0.034) had higher Oral Health Impact Profile-14 scores. Most impaired domains were physical pain (p=0.045), functional limitation (p=0.007) and psychological discomfort (p=0.045). Influence of temporomandibular disorder presence and severity on oral health-related quality of life* Influência da presença e gravidade da disfunção temporomandibular na qualidade de vida relacionada com a saúde oral

Purpose: To evaluate the roughness and color change of a conventional acrylic resin and a bis-acryl resin, submitted to different types of polishing and exposed to a staining solution. Materials and Methods: One hundred specimens were manufactured from an autopolymerizing conventional acrylic resin (Duralay, shade 66) (n = 50) and a bis-acryl resin (Protemp 4, shade A3) (n = 50) according to the manufacturers' instructions. Specimens were subdivided into 10 groups (n = 10), according to the type of resin and polishing method, including no-polishing (control groups for acrylic resin [tungsten bur finishing] and bis-acryl resin [cotton and alcohol]), Enhance System, Edenta kit, Labordental kit, and sandpaper. The specimens were immersed in a staining solution (coffee at 60°C) for 7 days. Surface roughness was evaluated before the first immersion (baseline -Ra1) and after 7 days (Ra2). The color change (E) was determined after 24 hours (E1) and 7 days (E2), by CIE L * a * b * scale. Data were statistically analyzed with 3-way ANOVA for repeated measures test and Tukey test (α = 0.05). Results: According to 3-way ANOVA test, material, polishing techniques, and polishing*material factors exhibited statistically significant influence (p < 0.0001) on the roughness, and, for color change, material, polishing techniques, time, polishing*material, and material*time factors were statistically significant (p < 0.0001). The polishing techniques successfully reduced the surface roughness of acrylic resin groups, when compared to control (p < 0.001), but for bis-acryl resin, results were not different from the control group (Enhance: p = 0.954, Edenta: p = 0.866, sandpaper: p = 0.366, Labordental: p = 0.945). Surface roughness was not affected by the immersion in staining solution for 7 days. Color change of acrylic resin groups after 24 hours and 7 days of immersion exhibited a clinically acceptable value ( E < 3.7) with the exception of the Enhance group, and all bis-acryl resin groups exhibited a clinically unacceptable color change value ( E > 3.7) independent of polishing technique and time interval (E1 and E2). Conclusions: Roughness of both materials was similar when the polishing techniques studied were performed, although Ra values were superior to the clinically acceptable values (0.20 µm), and were not affected by the immersion protocol studied; however, when esthetics are critical, the selection of material type is more important than the surface treatment technique used, and bis-acryl resin was more susceptible to clinically unacceptable color change after immersion in a staining solution.Provisional restorations should be prepared to reproduce and maintain the tooth's natural properties, such as size, position, shape, color, surface texture, and dental translucency. 1-3 Currently, with the development of new dental materials, professionals have many options to manufacture provisional restorations. These options include poly methyl methacrylate (PMMA), poly ethyl methacrylate (PEMA), polyvinyl ethyl methacrylate (P...

The objective of this study was to characterize morphological and biochemistry action of low-level laser therapy (LLLT) on induced arthritis in the temporomandibular joint (TMJ) of rats. Twenty-four male Wistar rats were randomly divided into groups with 12 animals each: (AG) group with arthritis induced in the left TMJ and (LG) group with arthritis induced in the left TMJ and treated with LLLT (830 nm, 30 mW, 3 J/cm(2)). Right TMJs in the AG group were used as noninjected control group (CG). Arthritis was induced by intra-articular injection of 50 μl Complete Freund's Adjuvant (CFA) and LLLT began 1 week after arthritis induction. Histopathological analysis was performed using sections stained with hematoxylin-eosin, Toluidine Blue, and picrosirius. Biochemical analysis was determined by the total concentration of sulfated glycosaminoglycans (GAGs) and evaluation of matrix metalloproteinases (MMP-2 and MMP-9). Statistical analysis was performed using paired and unpaired t tests, with p < 0.05. Compared to AG, LG had minor histopathological changes in the TMJ, smaller thickness of the articular disc in the anterior (p < 0.0001), middle (p < 0.0001) and posterior regions (p < 0.0001), high birefringence of collagen fibers in the anterior (p < 0.0001), middle (p < 0.0001) and posterior regions (p < 0.0001) on the articular disc, and statistically lower activity of MMP-2 latent (p < 0.0001), MMP-2 active (P = 0.02), MMP-9 latent (p < 0.0001), and MMP-9 active (p < 0.0001). These results suggest that LLLT can increase the remodeling and enhancing tissue repair in TMJ with induced arthritis.

Este estudo objetivou avaliar a Política Nacional de Saúde Bucal na atenção de média complexidade, considerando o desempenho dos Centros de Especialidades Odontológicas (CEOs) da Paraíba. Foram avaliados 19 CEOs, utilizando-se dados secundários da produção de 2007 a 2010, registrados pelo Sistema de Informação Ambulatorial do Sistema Único de Saúde (SIA/SUS). Os dados foram obtidos, tabulados e organizados de acordo com os subgrupos de procedimentos odontológicos, segundo a Portaria Ministério da Saúde/Gabinete do Ministro n° 600. O desempenho insatisfatório dos CEOs é revelador de falhas, especialmente na gestão e na organização desses serviços. O processo de avaliação é uma etapa fundamental para garantir uma melhor qualidade dos serviços à população.

COVID-19 is an infection caused by the SARS-CoV-2 virus, initially identified in the city of Wuhan, China, in December 2019. Since then, the virus has spread to the continents, causing a major pandemic. The impacts of this pandemic on the education of human anatomy interfere in at least two aspects: (1) receiving and managing anatomical specimens in anatomy laboratories and (2) adaptations for classes on remote virtual teaching. Therefore, this study reviewed and discussed the legal and bioethical aspects, considering the scenario of a South American Country, aiming to stimulate the debate on these two relevant themes in the international community. Because of the COVID-19 pandemic and the impossibility of mass testing, anatomists and other workers in the field must deal with the risk of receiving bodies infected with SARS-CoV-2. In this situation, additional care measures in biosafety practices are essential to protect the staff. Such measures are: the bodies must be preserved by the perfusion of formaldehyde or other fixative solutions; embalming must be performed in ventilated rooms with a good air exhaust system; to avoid excessive manipulation of bodies and procedures such as pulmonary insufflation or craniotomy; and proper use of personal protective equipment, including lab coat, gloves and masks. As for exposure of body images in online classes, this review showed that there are no legal impediments to this end. However, anatomists must adopt measures aimed at protecting the memory of the deceased, such as using secure digital platforms with restricted access; family authorization/consent and student awareness.

ResumoIntrodução: O papel da oclusão como fator etiológico das disfunções temporomandibulares (DTMs) tem sido um assunto polêmico e ainda controverso. Objetivo: Avaliar a correlação entre sinais e sintomas da disfunção temporomandibular e a severidade da má oclusão. Método: Foram avaliados 135 estudantes de Odontologia da UFPB. A presença de DTM foi estimada através do Índice Anamnésico de Fonseca (DMF) e de questões objetivas sobre seus sintomas. Os estudantes também foram submetidos a um protocolo resumido de avaliação clínica de DTM. A avaliação dos fatores oclusais foi realizada através do Índice de Prioridade de Tratamento (IPT) aplicado a modelos de gesso dos arcos dentários superior e inferior. As diferenças entre as médias do IPT relacionadas aos sinais e sintomas de DTM foram determinadas por meio dos testes t e One-way ANOVA. As correlações entre os fatores oclusais e a DTM foram determinadas a partir de correlação de Pearson. Resultado: A severidade da má oclusão, segundo o IPT, não influenciou no surgimento de DTM e de sinais clínicos musculares ou articulares, e na necessidade de tratamento. A má oclusão de classe II, trespasse vertical acentuado e dentes girados foram estatisticamente correlacionados à necessidade de tratamento e aos sinais clínicos de DTM. Conclusão: Em modelos multifatoriais, como na fisiopatologia da DTM, a oclusão pode desempenhar um papel de cofator na predisposição ou perpetuar as diferentes formas de DTM, não devendo ser considerada fator principal.Descritores: Síndrome da Disfunção da Articulação Temporomandibular; má oclusão; oclusão dentária. AbstractIntroduction: The role of occlusion as an etiologic factor of temporomandibular disorders (TMD) has been polemic and still controversial. Objective: To evaluate the correlation between signs and symptoms of temporomandibular disorders and severity of malocclusion. Method: A total of 135 undergraduate dental students from Federal University of Paraíba were evaluated. The presence of TMD was estimated by Fonseca's Anamnestic Index and objective questions about symptoms were addressed. Students were also submitted to a summarized protocol for clinical evaluation of TMD. The evaluation of occlusal factors was performed using the Treatment Priority Index (TPI) applied to plaster casts corresponding to upper and lower dental arches. The differences between the means of IPT related to signs and symptoms of TMD were determined by t tests and One-way ANOVA. Correlations between occlusal factors and TMD were determined by Pearson correlation. Result: According to the TPI, the severity of the malocclusion did not influence the onset of TMD, muscle or joint clinical signs and need for treatment. Class II malocclusion, marked overbite and rotated teeth were statistically correlated with the need for treatment and clinical signs of TMD. Conclusion:In multifactor models as in the pathophysiology of TMD, occlusion can play a role as a co-factor in predisposing or perpetuating the different forms of TMD. As such, it should not be considered a...

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