Dados do Trabalho

Título

Dental side effects evaluation in users of the Intraoral Mandibular Advancement appliance with intraoral scanner. A new evaluation method.

Introdução

Dental alterations are a possible side effects observed in long-term users of mandibular advancement intraoral appliances (IOAma). The monitoring and evaluation of dental stability are commonly performed with intraoral photos, plaster models of the dental arches and radiographs, which are periodically repeated and compared with the initial files visually and superimposing teleradiographs with a cephalometric study. As they are relatively accurate comparison methods, dental side effects can already be recognized by professionals with considerable magnitude, making the management and reversal of the condition complex, and may lead the user to abandon treatment.

Objetivo

To describe an accurate, practical and reproducible method of evaluating dental stability in IOAma users by comparing digital models of dental arches obtained by intraoral scanner.

Métodos

41 IOAma users had their dental arches scanned before use and after a period of 6 to 12 months of IOAma use. Using a software, the digital files obtained at times T0 (initial) and T1 (6-12 months) were superimposed and compared regarding the stability of dental positioning in the arches, making it possible to quantify the coincidence or not of the files in millimeters. We selected 6 teeth per arch (central incisors, canines and first molars) and 3 different points along the long axis of the tooth in the incisors (incisal, middle and cervical) and 6 points in the canines and first molars (incisal/incisal(M), medium /medium(M) and occlusal/occlusal(M)). The following comparisons were made: a) upper arch only; b) lower arch only; c) upper and lower arches occluded in T0 x T1. The comparison of tooth movement was performed using paired t test (data not normally distributed were transformed by the natural exponential function and the inverse of natural exponential function).

Resultados

Comparing upper and lower dental arches, the only tooth that did not undergo significant movement was 16. Tooth 41 (p<0.001) showed significant movement in all marked points. Occluded arches analysis showed teeth 13, 23, 31, 41 and 43 with significant movement (p<0.001) at all marked points.

Conclusões

The use of intraoral scanner proved to be an accurate and practical tool to aid the early dental side effects diagnosis in IOAma users.

Palavras -chave

Keywords: Intraoral appliance; Intraoral scanner; Dental side effects.