Avaliação do preparo apical da raiz mesial de molares inferiores utilizando dois sistemas de instrumentação rotatória de niquel-titânio

• Autor(a) principal: Borges, Luciana Fonseca
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14225
• topic: Instrumentation rotatory; Nickel-titanium; Molars; Instrumentação rotatória; Niquel-Titânio; Molares inferiores; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ENDODONTIA

The aim of this study was to evaluate the effects of the instruments in the apical portion of mesiobuccal canals of mandibular molars using two different rotatories techniques during biomechanical preparation. Were selected 40 human molars with degree of curvature of the mesial root of 25°, which were embedded in polyester resin in a muffle and divided into four groups. In group I, 10 roots were instrumented by the technique of rotary ProTaper Universal System® (MAILLEFER) to the file F2. In group II, 10 roots were instrumented by the technique of rotary ProTaper Universal System® to file F4. The groups III and IV were instrumented technique MTWO Rotatory System® (VDW), up to 25 files and 40, respectively. For the measurement of areas of the apical preparation, digital photographs were taken before and after surgery using a digital camera. The images were transferred to the UTHSCSA Image Tool software, and the results were statistically analyzed. We performed the Kruskal-Wallis test using SPSS 17.0 software system (SPSS Inc., Chicago, IL, USA), which showed no statistically significant difference between samples of groups I and III (p> 0.05) in regarding the difference between the instrumented areas. Among the groups II and IV was no statistical difference (p <0.05) when the same test was applied. Was concluded that there is no difference between the instrumentation performed between these different systems when used taper 25 and, when used files taper 40, the instrumentation performed by Rotary ProTaper Universal System® was superior to the MTWO Rotatory.