Avaliação comparativa da relação cabeça da mandíbula/fossa mandibular em indivíduos assintomáticos e sintomáticos, nas posições de relação cêntrica e máxima intercuspidação, por meio de tomografia computadorizada de feixe cônico

This study quantitatively evaluated the discrepancies in the condyle/mandibular fossa relationship between centric relation (CR) and maximum intercuspation (MI) in symptomatic and asymptomatic subjects using cone-beam computed tomography (CBCT). Fourty young volunteers (aged 18 to 25 years) were distributed equally into symptomatic and asymptomatic groups according to the research diagnostic criteria for temporomandibular disorders (RDC/TMD). They were submitted to one tomographic scan in MI and one in CR. Measurements were performed on lateral and frontal cuts of the patients temporomandibular joints, and the data collected were compared using Mann Whitney U test at a significance level of 5%. For symptomatic and asymptomatic groups, there were no statistically significant differences between CR and MI measurements. Also, there were no significant differences in the correspondent measurements, when compared between symptomatic and asymptomatic groups, for both mandibular positions. The comparison between left and right sides of subjects also showed no significant differences in both positions (MI, CR). The measurements in young subjects with practically intact dentitions using cone-beam computed tomography did not demonstrate differences between centric relation and maximum intercuspation, independently of the group. The comparison between condylar position of symptomatic and asymptomatic subjects were also similar. Considering the methodology used and the characteristics of the sample, very small discrepancies were found in most measurements, and were not statistically significant intra and intergroups.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorMestre em OdontologiaEste estudo teve por objetivo comparar a relação cabeça da mandíbula/fossa mandibular em indivíduos assintomáticos e sintomáticos em posições de relação cêntrica (RC) e máxima intercuspidação (MI), por meio de tomografia computadorizada de feixe cônico (TCFC). Quarenta voluntários jovens (18 a 25 anos) participaram do estudo, compondo um grupo de vinte indivíduos assintomáticos e um grupo de vinte indivíduos de sintomáticos, de acordo com o instrumento critérios de diagnóstico para pesquisa das disfunções temporomandibulares - RDC/TMD. Cada participante foi submetido a duas tomografias, uma tomografia em MI e outra em RC. As medidas dos espaços articulares foram realizadas em cortes lateral e frontal das articulações temporomandibulares, e os dados coletados foram analisados estatisticamente por meio do teste U de Mann-Whitney ao nível de 5% de significância. Para os grupos assintomáticos e sintomáticos, não houve diferenças estatisticamente significantes entre RC e MI. Além disso, não houve diferenças estatisticamente significantes quando comparadas as medições do grupo assintomáticos com o sintomáticos, em posições de MI e RC. A comparação dos espaços articulares entre lados direito e esquerdo dos indivíduos também não apresentou diferenças significantes, tanto para MI quanto para RC. Considerando a metodologia utilizada e as características da amostra, foi possível verificar discrepâncias de pequena magnitude na maioria das mensurações, porém não foram estatisticamente significantes intra e inter-grupos

Avaliação histomor fométrica dos efeitos da movimentação dentária induzida sobre molares murinos submetidos à luxação extrusiva em períodos tardios

The repair process after dentoalveolar trauma (DT) depends on several factors and complications may arise weeks, months or even years after the injury, it is essential for long-term monitoring. Therefore orthodontic approach teeth related episodes of DT greatest concern and requires careful management. The objective of this study was to evaluate root resorptions on traumatized teeth - extrusive luxation (EL), submitted to induced tooth movement (ITM) after later periods of tissue repair. Eighty young male Wistar rats aged 45 days were used in the present study. The animals were divided into eight groups (n = 10): Group 1 (G1) sacrificed 28 days after, without EL and ITM; Group 2 (G2) subjected to EL and sacrificed 28 days after; Group 3 (G3), 28 days after were submitted to a ITM during 7 days and sacrificed; Group 4 (G4) subjected to EL and, 28 days after, ITM during 7 days and sacrificed. Group 5 (G5) sacrificed 45 days after, without EL and ITM; Group 6 (G6) subjected to EL and sacrificed 45 days after; Group 7 (G7), 45 days after were submitted to a ITM during 7 days and sacrificed; Group 8 (G8) subjected to EL and, 45 days after, ITM during 7 days and sacrificed. The tooth used for the procedures was first upper right molar, luxated using Hollemback 3S and moved mesially by nickel-titanium closed coil (50 cN). After the experimental period, the animals were sacrificed by anesthetic overdose and the right maxilla were removed and processed in longitudinal sections stained with hematoxylin and eosin for histological analysis under light microscopy. Analysis of depth of root resorption by means of scores and analysis of resorptive activity through clastic cell count in contact with the radicular dentin was performed. Kappa test was used for intra-examiner reliability with a 95% confidence interval. Reliability results for...O processo de reparo após traumatismo dentoalveolar (TD) depende de vários fatores e as complicações podem surgir semanas, meses ou até mesmo anos após a injúria, sendo indispensável o acompanhamento em longo prazo. Por esse motivo a abordagem ortodôntica de dentes relacionados com episódios de TD causa maior preocupação e requer conduta cautelosa. O objetivo deste trabalho foi avaliar as reabsorções radiculares em dentes com TD do tipo luxação extrusiva (LE) submetidos à movimentação dentária induzida (MDI) após tempos tardios de reparo (28 e 45 dias). Foram utilizados 80 ratos machos jovens com 45 dias de idade da linhagem Wistar. Os animais foram divididos em oito grupos (n = 10): Grupo 1, eutanasiados após 28 dias; Grupo 2, submetidos à LE e eutanasiados após 28 dias; Grupo 3, após 28 dias foram submetidos à MDI durante 7 dias e eutanasiados; Grupo 4, submetidos à LE e após 28 dias foram submetidos à MDI durante 7 dias e eutanasiados; Grupo 5, eutanasiados após 45 dias; Grupo 6, submetidos à LE e eutanasiados após 45 dias; Grupo 7, após 45 dias foram submetidos à MDI durante 7 dias e eutanasiados; Grupo 8, submetidos à LE e após 45 dias foram submetidos à MDI durante 7 dias e eutanasiados. O dente utilizado para os procedimentos foi o primeiro molar superior direito, luxado utilizando-se espátula Hollemback 3S e movimentado mesialmente por meio de mola fechada de níquel-titânio (50cN). Após tempo experimental, os animais foram eutanasiados por excesso de anestésico e a hemimaxila direita foi removida e processada em cortes longitudinais, corados em hematoxilina e eosina, para análise histológica em microscópio óptico. Foi realizada análise da profundidade das reabsorções radiculares por meio de escores e análise da atividade reabsortiva por meio de contagem de células clásticas em contato...Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

Temporomandibular disorder and anxiety, quality of sleep, and quality of life in nursing professionals

To evaluate the association between temporomandibular disorder (TMD) and anxiety, quality of sleep, and quality of life in nursing professionals at theHospital de Clínicas de Uberlândiaof theUniversidade Federal de Uberlândia – HCU-UFU (Medical University Hospital of the Federal University of Uberlândia), four questionnaires were given to nursing professionals. The questionnaires were completed by 160 of these professionals. The Fonseca’s questionnaire was used to evaluate the presence and severity of TMD, the IDATE was used to evaluate anxiety, the SAQ was used to evaluate quality of sleep, and the SF-36 was used to evaluate quality of life. Forty-one nurses (25.6%) reported having no TMD (Fonseca’s questionnaire score ≤ 15), 66 (41.3%) had mild TMD (Fonseca’s questionnaire score 20–40), 39 (24.4%) had moderate TMD (Fonseca’s questionnaire score 45–65), and 14 (8.8%) had severe TMD (Fonseca’s questionnaire score ≥ 70). According to Fonseca’s questionnaire, the presence of TMD was associated with trait anxiety, but the TMD severity was associated with state anxiety classification (mild, moderate, severe). The SAQ score differed significantly from Fonseca classification. The Fonseca’s questionnaire score correlated negatively with the score of each dimension of the SF-36 (r = –0.419 to –0.183). We conclude that TMD is common among nursing professionals; its presence was associated with trait anxiety, and its severity was associated with state anxiety. Hence, the presence of TMD may reduce quality of sleep and quality of life

Cone-beam tomography assessment of condylar position discrepancy between centric relation and maximal intercuspation

The magnitude of occasional discrepancies between the centric relation and maximal intercuspation positions remains a controversial subject. This study quantitatively evaluated the possible discrepancies in the condyle/mandibular fossa relationship between these positions using cone-beam computed tomography. Twenty young and asymptomatic volunteers were distributed equally into normal occlusion and Angle Class I, II and III malocclusion groups. They were submitted to one tomographic scan in maximal intercuspation and one in centric relation. Measurements were performed on lateral and frontal cuts of the patients' temporomandibular joints, and the data collected were compared using Student's t test at a significance level of 5%. The results showed that there were no statistically significant differences between the centric relation and maximal intercuspation positions in young and asymptomatic patients with practically intact dentitions using cone-beam computed tomography