Desenvolvimento de um método computacional para avaliação da conformidade de cones obturadores acessórios

Abstract

The present study aimed to evaluate the standardization quality of the accessory gutta-percha cones Fine Medium (FM), Medium (M) and Medium Large (ML) of five different commercial brands of gutta-percha cones and a brand of Resilon cone, through the development of an automated method of digital image processing and analysis sequence. Hence, 21 cones of each conicity and commercial brand were digitalized with a scanner with 1200 DPI, which implicates on a precision of 0,021mm and a sequence of digital image processing were developed to obtain automatic measures of the following parameters: D0, D3, D16, length (L) and conicity (C). The measures found were submitted to statistical analysis and comparisons among the groups of the means of each parameter evaluated. Numbers 57 and 78 ANSI/ADA specifications were used as references to the standardization analysis of the tested cones. Based on the results obtained it was possible to conclude that there is an inefficient standardization of obturating cones, which presented large variations among the different tested brands and in a single brand also. The method developed to measure the parameters of the obturating cones control group was very efficient, producing reliable results.