Método para o ensino laboratorial em odontologia:emprego de software gratuito para análise de instrumentação de canais radiculares em tomografia computadorizada

Abstract

Training in Dentistry requires students to learn and improve manual skills prior to performing clinical procedures on patients. Due to the need to verify the competence and encourage the development of skills of undergraduate students in Dentistry, the pre sent study aims to use a protocol to evaluate the preparation of root canals with mechanized systems in artificial teeth, through imaging analysis via free software for cone beam computed tomography. The present study carried out qualitative analyzes of t omographic images referring to the pre-instrumentation and post-instrumentation of the root canals of 4 artificial teeth made of resin (IM do Brasil, São Paulo, SP, Brazil). The teeth used in the research are replicas of the upper first molar. Two groups were created: Group 1, composed of teeth 1 and 2 with radiopacifying material; Group 2, consisting of teeth 3 and 4 without the presence of radiopacifying material. Both groups were allocated in transparent polyester resin, developed for the practice of roo t canal preparation techniques. In group 1, root canal instrumentation were performed using NiTi M -Wire files with reciprocating kinematics (Reciproc, VDW, Munich, Germany). In group 2, NiTi CM-Wire files with rotational kinematics were used (ProDesign Logic, Easy, Minas Gerais, Brazil). After instrumentation, an enlargement of all tooth canals was observed, allowing tomographic segmentation. However, limitations were found during the pre-instrumentation teeth segmentation, such as the lack of clarity of the light in the canals, thus making it difficult to superimpose the pre- and post-instrumentation images. The present work proved to be important from an educational point of view, the continuous evaluation of the teaching-learning process and the inclusion of new tools that can avoid its subjectivity.