ABSTRACT
Este estudo teve como objetivo avaliar a associação entre a qualidade do sono e a presença de disfunção temporomandibular (DTM) e hábitos parafuncionais em estudantes e profissionais de Odontologia durante a pandemia de COVID-19. Cirurgiões-dentistas, docentes e estudantes brasileiros de graduação e pós-graduação em Odontologia responderam a um questionário virtual composto pelos seguintes instrumentos: Índice de Qualidade do Sono de Pittsburgh, Lista de Verificação de Comportamentos Orais, Índice Anamnésico de Fonseca e questões socioeconômicas e demográficas. Os questionários foram disponibilizados online de agosto a novembro de 2020. A associação entre as variáveis preditoras e cada desfecho foi avaliada por meio da regressão de Poisson. A amostra foi composta por 449 participantes, sendo que 259 (59,5%) relataramdistúrbios do sono, 352 (78,4%) apresentavam DTM e 311 (69,3%) realizavam hábitos orais parafuncionais. Os distúrbios do sono foram associados à maior prevalência de hábitos orais parafuncionais (RP 1,61; IC 95% 1,36-1,91) e DTM (RP 1,16; IC 95% 1,04-1,29). Além disso, as mulheres apresentaram maior prevalência de DTM em relação aos homens, assim como indivíduos cuja renda era menor. Desta forma, os distúrbios do sono foram associados a hábitos orais parafuncionais e DTM em estudantes e profissionais de Odontologia durante a quarentena da COVID-19 (AU).
Este estudio tuvo como objetivo evaluar la asociación entre la calidad del sueño y la presencia de disfunción temporomandibular (DTM) y hábitos parafuncionales en estudiantes y profesionales de Odontología durante la pandemia de COVID-19. Odontólogos, profesores y estudiantes brasileños de pregrado y posgrado en Odontología respondieron un cuestionario virtual compuesto por los siguientes instrumentos: Índice de Calidad de Sueño de Pittsburgh, Lista de Verificación de Comportamiento Oral, Índice Anamnésico de Fonseca y preguntas socioeconómicas y demográficas. Los cuestionarios estuvieron disponibles virtualmente de agosto a noviembre de 2020. La asociación entre las variables predictoras y cada resultado se evaluó mediante regresión de Poisson. La muestra estuvo compuesta por 449 participantes, de los cuales 259 (59,5%) refirieron trastornos del sueño, 352 (78,4%) DTM y 311 (69,3%) hábitos orales parafuncionales. Los trastornos del sueño se asociaron con una mayor prevalencia de hábitos bucales parafuncionales (RP 1,61; IC 95% 1,36-1,91) y DTM (RP 1,16; IC 95% 1,04-1,29). Además, las mujeres tenían una mayor prevalencia de DTM que los hombres, así como las personas con ingresos más bajos. Así, los trastornos del sueño se asociaron con hábitos orales parafuncionales y DTM en estudiantes y profesionales de odontología durante la cuarentena por COVID-19 (AU).
This study aimed to assess the association between sleep quality and the presence of temporomandibular disorders (TMD) and parafunctional habits in dental students and professionals during the COVID-19 quarantine. Brazilian dentists, professors, and dental undergraduate and graduate students answered a virtual questionnaire composed of the following instruments: Pittsburgh Sleep Quality Index. Oral Behaviors Checklist, Fonseca Anamnestic Index, and socioeconomic and demographic questions. Questionnaires were available on-line from August to November 2020. The association between the predictor variables and each outcome were assessed using Poisson regression. The sample consisted of 449 participants, 259 (59.5%) of whom had sleep disorders, 352 (78.4%) had TMD, and 311 (69.3%) had parafunctional oral habits. Sleep disorders were associated with higher prevalence of parafunctional oral habits (PR 1.61; 95%CI 1.36-1.91) and TMD (PR 1.16; 95%CI 1.04-1.29). Furthermore, women showed a higher prevalence of TMD in comparison to men, as well as individuals with lower income. Sleep disorders were associated with parafunctional oral habits and TMD in dental students and professionals during COVID-19 quarantine (AU).
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Sleep Wake Disorders , Facial Pain/pathology , Bruxism/pathology , Temporomandibular Joint Disorders , Sleep Quality , Students, Dental , Cross-Sectional Studies/methods , Surveys and Questionnaires , Regression Analysis , DentistsABSTRACT
Aim: This study aimed to assess the prevalence of temporomandibular disorders (TMD) and psychosocial comorbidities in undergraduate dental students in a southern Brazilian university, during the COVID-19 pandemic. Also, it aimed to verify the association between psychosocial factors and TMD. Methods: Fonseca Anamnestic Index, Depression Anxiety Stress Scale (DASS-21), a socioeconomic questionnaire, and questions about academic performance and social distancing were applied. Poisson regression analysis was used to assess the association of predictive variables with TMD. Results: The prevalence of TMD was found to be 82.4%, and more than half of the students had some degree of stress, anxiety, and depression. Students who had symptoms of stress (RR 1.11; 95% CI 1.04-1.19), anxiety (RR 1.19; 95% CI 1.12-1.27) and reported academic performance worsening (RR 1.12; 95% CI 1.07-1.19) had higher TMD scores. Conclusion: The findings suggest that TMD was highly prevalent among dental students at a federal university in southern Brazil during the pandemic, being associated with high levels of stress, anxiety, poor academic performance, and greater social distancing
Subject(s)
Humans , Male , Female , Adult , Anxiety , Students, Dental , Temporomandibular Joint Disorders/epidemiology , Depression , COVID-19ABSTRACT
Casos de bruxismo e disfunção temporomandibular (DTM) têm se tornado cada vez mais frequentes na prática clínica. Reconhecer seus mecanismos é necessário para o sucesso do controle e tratamento. O objetivo deste estudo piloto foi investigar o conhecimento e a percepção sobre DTM e bruxismo dos estudantesde Odontologia da Universidade Federal de Santa Maria (UFSM). Para isso um questionário com 15 questões foi aplicado a20 estudantes dessa instituição, sendo 10 do 7º e 10 do 10º semestre. Todos os estudantes avaliados relataram ouvir sobre DTM durante a graduação, mas 70% consideraram que possuíam pouca ou nenhuma base de conhecimento sobre o assunto. Noventa por cento dos estudantes relatou não conhecer a ferramenta utilizada em pesquisas para diagnóstico das DTM. Não houve diferença estatística entre os grupos avaliados e a média geral de acertos foi de 54%. Os dados evidenciam o pouco conhecimento sobre os assuntos abordados e a fragilidade do ensino destas alterações, especialmente pela não evolução do conhecimento sobre DTM e bruxismo ao longo do curso avaliado, pois o grupo de estudantes do 10º semestre apresentou resultados inferiores quando comparados ao do 7º semestre, que passaram recentemente pela Clínica de Oclusão, na qual os temas são abordados (AU).
Bruxism and temporomandibular disorders (TMD) have become increasingly frequent in clinical practice. Recognizing its mechanisms is necessary for successful management and treatment. The aim of this pilot study was to investigate the knowledge and perception about TMD and bruxism of dental undergraduate students from the Federal University of Santa Maria (UFSM). A questionnaire with 15 questions was applied to 20 students from this institution, 10 from the 7th and 10 from the 10th semester. All evaluated students reported hearing about TMD during the Dentistry course, but 70% considered that they had little or no knowledge on the subject. Ninety percent of students reported not knowing the instrument used in research to diagnose TMD. There was no statisticaldifference between the evaluated groups, and the overall average of correct answers was 54%. Data show little knowledge about the subjects and fragility regarding the teaching-learning process of these topics. Moreover, the non-evolution of knowledge about TMD and bruxism throughout the evaluated course is evident, as the group of students in the 10th semester showed poorer results when compared to the 7th semester, which have recently finished the discipline in which these themes are addressed (AU).
Subject(s)
Humans , Male , Female , Adult , Students, Dental/psychology , Bruxism/diagnosis , Temporomandibular Joint Disorders/pathology , Health Knowledge, Attitudes, Practice , Educational Measurement/methods , Social Perception , Brazil , Chi-Square Distribution , Surveys and Questionnaires , Qualitative ResearchABSTRACT
PURPOSE: To evaluate the microtensile bond strength of indirect resin composite inlays to dentin using two cementation strategies, before and after mechanical aging. MATERIALS AND METHODS: Standardized inlay cavities (bucco-lingual width: 3 mm; depth: 4 mm) were prepared in 32 human premolars. The teeth were embedded in self-curing acrylic resin up to 3 mm from the cementoenamel junction, impressions were made using a polyvinyl siloxane material, master dies were obtained using type 4 stone, and inlay composite resin restorations were fabricated (Sinfony, 3M ESPE). The teeth were randomly allocated into 4 groups according to the cementation strategy (conventional [C] and simplified [S]) and aging (mechanical cycling [MC] and not aged): C[G1]: Adper SingleBond + RelyX ARC without aging; CMC[G2]: conventional cementation + mechanical cycling (106 cycles, 88 N, 4 Hz, ± 37°C); S[G3]: self-adhesive resin cement (RelyX U-100) without aging; SMC[G4] self-adhesive cementation + mechanical cycling. Intaglio surfaces of composite inlays were treated by tribochemical silica coating in G1 and G2, while G3 and G4 received no surface treatment. Non-aged specimens were stored in a moist environment at ca 37°C for the same period as MC (3 days). Non-trimmed beam specimens (bonding area = 1 mm²) were produced by serial cutting, and microtensile testing was performed (0.5 mm/min). RESULTS: Two-way ANOVA showed that the microtensile bond strength was affected only by cementation strategy (p < 0.0001). Tukey's test showed that groups G1 (35.1 ± 9.1) and G2 (32.7 ± 10.7) presented significantly higher bond strength values than G3 (8.7 ± 6.3) and G4 (5.2 ± 4.6). CONCLUSION: The use of a conventional adhesive technique and tribochemical silica coating resulted in higher µTBS than the one-step simplified cementation, even after mechanical cycling.
Subject(s)
Cementation/methods , Composite Resins/chemistry , Dental Bonding , Dental Materials/chemistry , Dentin/ultrastructure , Inlays , Adhesiveness , Bicuspid/ultrastructure , Bisphenol A-Glycidyl Methacrylate/chemistry , Dental Cavity Preparation/methods , Humans , Materials Testing , Methacrylates/chemistry , Polyethylene Glycols/chemistry , Polymethacrylic Acids/chemistry , Resin Cements/chemistry , Silanes/chemistry , Stress, Mechanical , Surface Properties , Temperature , Tensile Strength , Time Factors , Water/chemistryABSTRACT
This study investigated the influence of laser welding and electroerosion procedure on the passive fit of interim fixed implant-supported titanium frameworks. Twenty frameworks were made from a master model, with five parallel placed implants in the inter foramen region, and cast in commercially pure titanium. The frameworks were divided into 4 groups: 10 samples were tested before (G1) and after (G2) electroerosion application; and another 10 were sectioned into five pieces and laser welded before (G3) and after (G4) electroerosion application. The passive fit between the UCLA abutment of the framework and the implant was evaluated using an optical microscope Olympus STM (Olympus Optical Co., Tokyo, Japan) with 0.0005mm of accuracy. Statistical analyses showed significant differences between G1 and G2, G1 and G3, G1 and G4, G2 and G4. However, no statistical difference was observed when comparing G2 and G3. These results indicate that frameworks may show a more precise adaptation if they are sectioned and laser welded. In the same way, electroerosion improves the precision in the framework adaptation.
Subject(s)
Dental Prosthesis Design , Dental Prosthesis, Implant-Supported , Dental Soldering/methods , Electrolysis/methods , Lasers , Dental Abutments , Dental Materials/chemistry , Dental Polishing , Dental Soldering/instrumentation , Humans , Materials Testing , Microscopy , Surface Properties , Titanium/chemistryABSTRACT
This study investigated the effect of intrinsic pigmentation on the transverse strength of a microwave-cured acrylic resin. Forty transverse strength specimens were fabricated according to ADA specification #12 and divided into 5 groups. No fibers were added to group I (GI, control group); acrylic stain (AS) was added to GII and GIII in concentrations of 0.5 and 1.5% w/w, respectively; acrylic fibers (AF) were added to groups GIV and GV in concentrations of 0.5 and 1.5% w/w, respectively. All specimens were irradiated in a microwave oven with a cycle of 3 min at 360 W, followed by 4 min resting, then 3 min at 810 W. Flasks were bench-cooled for 30 min at room temperature, followed by immersion in cold tap water for 30 min. After storage in distilled water at 37 degrees C for 48 h, all specimens were tested for flexural strength in a testing machine (EMIC-DL 500) at a crosshead speed of 0.5 cm/min. Mean and standard deviation (MPa) for the flexural strength test were: GI = 86.0 +/- 7.9; GII = 86.0 +/- 9.8; GIII = 86.6 +/- 7.7; GIV = 84.9 +/- 5.3; GV = 84.9 +/- 5.2. No statistical differences were detected among the groups (ANOVA, p > 0.05). The addition of the acrylic fibers or the acrylic stain did not affect the transverse strength of the microwave-cured acrylic resin.
Subject(s)
Acrylic Resins/chemistry , Denture Bases , Denture Design/methods , Microwaves , Prosthesis Coloring , Analysis of Variance , Dental Stress Analysis , Materials Testing , Pliability , Polymers/chemistryABSTRACT
Este trabalho tem por objetivo apresentar um método mecânico de remoção de núcleos intra-radiculares, eficaz e rápido, que requer mínima remoção de estrutura dental remanescente, com risco mínimo a fraturas e perfurações radiculares. Ao longo de dezoito anos de testes clínicos controlados, o saca-pinos M&V apresentou um índice de sucesso de 99 por cento, o que garante a sua utilização segura, principalmente nas regiões anterior e de pré-molares
Subject(s)
Device Removal/instrumentation , Device Removal/methods , Dental Pulp Cavity , Dental PinsABSTRACT
This study investigated the effect of intrinsic pigmentation on the transverse strength of a microwave-cured acrylic resin. Forty transverse strength specimens were fabricated according to ADA specification #12 and divided into 5 groups. No fibers were added to group I (GI, control group); acrylic stain (AS) was added to GII and GIII in concentrations of 0.5 and 1.5 percent w/w, respectively; acrylic fibers (AF) were added to groups GIV and GV in concentrations of 0.5 and 1.5 percent w/w, respectively. All specimens were irradiated in a microwave oven with a cycle of 3 min at 360 W, followed by 4 min resting, then 3 min at 810 W. Flasks were bench-cooled for 30 min at room temperature, followed by immersion in cold tap water for 30 min. After storage in distilled water at 37ºC for 48 h, all specimens were tested for flexural strength in a testing machine (EMIC-DL 500) at a crosshead speed of 0.5 cm/min. Mean and standard deviation (MPa) for the flexural strength test were: GI=86.0 ± 7.9; GII=86.0 ± 9.8; GIII=86.6 ± 7.7; GIV=84.9 ± 5.3; GV=84.9 ± 5.2. No statistical differences were detected among the groups (ANOVA, p>0.05). The addition of the acrylic fibers or the acrylic stain did not affect the transverse strength of the microwave-cured acrylic resin
Subject(s)
Denture Bases , Denture Design , Microwaves , Prosthesis Coloring , Acrylic Resins/chemistry , Dental Stress Analysis , PliabilityABSTRACT
Os autores apresentam uma técnica de pigmentaçäo intrínseca de bases de prótese através da incorporaçäo em camadas de fios de lä acrílica na resina de cura térmica. O método de caracterizaçäo utilizado reproduz a translucidez, a profundidade e os tons dos tecidos gengivais, tornando a base da prótese mais natural