Evaluation of Canal Configuration of Human Permanent Maxillary First Premolars: A Conebeam Computerised Tomographic Analysis

AIM OF THE STUDY: This study aims to analyse canal configuration of human maxillary permanent first premolar tooth by using cone beam computerised tomographic techniques in a south Indian population in an invitro setting. METHODS: Samples were divided into three groups namely Group I (GP) (n=255), GPII (n=326), and GPIII (n=8). GPII subdivided into subgroup A (cervical third division (n=17)), subgroup B (middle third division (n=152)) and subgroup C (apical third division (n=157). Subgroup C was further subdivided into, subgroup D (division below apex (n=77) and Subgroup E (division at apex (n=80)).(Chart I) The teeth were processed, mounted in arches, coded and cone beam tomographic scanning done. RESULTS: Overall the canal configuration incidence in Group I was Type V (32.16%), followed by Type IV (28.63)%, Type II (14.51%), Type III (13.73%), Type I (9.02%), Type VI (0.78%), others (0.78%) and Type VII (0.39%).[Table 4 Chart V], Group II in both the buccal and palatal root was Type I (100%). [Table 5 Chart VI], Group III (three rooted teeth) in the mesiobuccal distobuccal and palatal roots was Type I (100%). [Table 6 Chart VII]. CONCLUSION: The two rooted premolar (Group II) was most common with a percentage of incidence of 55.35%. Type V in GP I, and Type I in GP II, was common canal configuration