Discrepância entre método convencional de odontometria com referência padrão

Abstract

This study aimed to compare the discrepancy between the conventional method of tooth length with a reference standard determined visually. We studied 57 extracted human tooth roots, being 17 previous, 20 premolars and 20 molar ones. The selected teeth had presented complete apexes, absence of api- cais fractures, crowns in good condition of conservation, absen- ce of endodontic treatment and canals accessible to the forame. Before any procedure, an initial periapical x-ray was performed. We measure the tooth with digital caliper (cusp tip or incisal edge until apical vertex) and we noted the data. After coronary opening, exploration, emptying of the root canals and prepa- ration of third cervical was performed the visual odontometry of the tooth, that is the visualization of the K-file type for the followed apical forame of jib of 1mm. After this was performed a periapical radiography of confirmation of the odontometry, using screen millimeter. The referring data in the distance be- tween the apical zero and the end of the file in the radiography, had been analyzed and tabulated, and finally determined the discrepancy between apical limit determined visually and ra- diographically. It was concluded that only 50.5% of the dental roots presents visual odontometry coincides with dental radio- graphy odontometry. The premolars were the largest group of discrepancy, followed by molars and earlier.