An Edge Detection Scheme for Endodontic Working Length Measurement in Root Canal Treatment for Succedaneous Teeth

摘要

The process of edge detection is useful in processing the dental x-ray images, specifically in determining the root morphology and the length to which the root has extended, for the purpose of providing root canal treatment. Generally, a manual analysis of an expert is made to determine these two features. However, the human analysis has two disadvantages: intra subject variability and inter subject variability in analyzing the features. Therefore, we propose an algorithm: Multi-scale and Multi Directional Analysis based Edge Detection with Statistical Thresholding (MMST), to determine these two features and were quite successful in their extraction. The results of the proposed algorithm are compared in terms of both qualitative and quantitative analysis with Canny method and are found to be doing appreciably well. The dental images used in this paper are taken from the database of the patients of Vishnu Dental College, Bhimavaram.