RESUMEN
The objective was to evaluate the shaping ability of XP-endo Shaper and Mtwo systems in oval-shaped canals preparation by microcomputed tomography (micro-CT) along the entire canal. The volume, surface area and percentage of unprepared area were evaluated by image processing in entire canal and apical third (5 mm). Apical transportation and centring ability were evaluated at 3, 5 and 7 mm from the apex. Forty single-canal oval canines were paired in two groups (n = 20) according to the instrumentation system: XP-endo Shaper and Mtwo. The teeth were scanned by micro-CT before and after instrumentation, using a thermal vat at 37°C. The XP-endo Shaper system was more effective in the instrumentation of oval-shaped canals when compared to Mtwo system, resulting in greater volume increases and lower percentage of unprepared canals walls in apical region. Regarding apical transportation and centring ability, no statistical difference was observed.
Asunto(s)
Cavidad Pulpar , Preparación del Conducto Radicular , Cavidad Pulpar/diagnóstico por imagen , Diente Molar , Microtomografía por Rayos XRESUMEN
Various etiologies are attributed to the development of subjective tinnitus, but their inter-relationship with the presence of temporomandibular disorders and depression is still poorly understood. To assess the presence of depressive symptoms in individuals with TMD and subjective tinnitus, assessing the impact on their quality of life. This is a cross-sectional observational descriptive study. We evaluated 44 patients in a public University. For TMD diagnosis as well as assessment of depressive symptoms, the RDC/TMD questionnaire was used. Otolaryngological assessment was conducted by means of pure tone, speech, and immitance audiometry. The "Tinnitus Handicap Inventory" questionnaire was also administered. 84% of the individuals with tinnitus had myofascial pain, with the masseter muscle being the most prevalent area of pain, and 16% exclusively had painful and/or degenerative TMJ changes. Among the patients with myofascial pain, 86,5% had depressive symptoms, while among those without myofascial pain, only 42,8% presented these symptoms. Eleven (11) patients (25%) reported slight impact of tinnitus on quality of life, 15 (34%) mild impact, 7 (16%) moderate, 7 (16%) severe, and 4 (9%) catastrophic impact. There was a positive association between the presence of myofascial pain and depressive symptoms (p=0,02), as the intensity of tinnitus increases and the severity of depressive symptoms (p<0,01).
Diversas etiologias são atribuídas ao desenvolvimento do zumbido subjetivo, contudo sua inter-relação com a presença das desordens temporomandibulares e depressão é ainda pouco compreendida. Avaliar a presença de sintomas depressivos em indivíduos portadores de DTM e zumbido subjetivo, avaliando o impacto da presença do zumbido na qualidade de vida dos mesmos. Tipo de estudo: trata-se de um estudo descritivo observacional transversal. Foram avaliados 44 pacientes do Serviço ATM da Faculdade de Odontologia da Universidade Federal de Juiz de Fora. Para diagnóstico das DTM assim como avaliação dos sintomas depressivos, foi utilizado o questionário do RDC/TMD. Foi realizada avaliação otorrinolaringológica, sendo feitas a audiometria tonal, vocal e imitanciometria. Também foi aplicado o questionário "Tinnitus Handicap Inventory". Dos 84% indivíduos com zumbido apresentaram dor miofascial, sendo o músculo masseter a região mais prevalente de dor, e 16% possuíram exclusivamente alterações álgicas e/ou degenerativas da ATM. Dentre os portadores de dor miofascial, 86,5% apresentaram sintomas depressivos, enquanto naqueles sem dor miofascial a presença destes sintomas estava presente em apenas 42,8%. 11 indivíduos (25%) relataram impacto do zumbido na qualidade de vida desprezível, 15 (34%) impacto leve, 7 (16%) moderado, 7 (16%) severo e 4 (9%) impacto catastrófico. Houve associação positiva entre a presença de sintomas depressivos e dor miofascial (p=0,02), assim como relação direta entre o aumento da intensidade do zumbido e a severidade dos sintomas depressivos (p<0,01).