ROOT FORM AND ROOT CANAL MORPHOLOGY IN MAXILLARY FIRST PREMOLARS - IN VITRO STUDY

Aim: The purpose of this study was to evaluate root and canal morphology of maxillary first premolars using a staining technique in cleared teeth. Material and methods: Our study was performed using extracted first maxillary premolars in the Histology Department of University of Medicine and Pharmacy Craiova. Results: When considering the number of roots for maxillary first premolars we noticed a high prevalence of two rooted first maxillary premolars 61,9%. 25,8% of the first maxillary premolars in our study presented a single root mesio-distally flattened, 9,5% of the premolars in our study presented one mesio-distally flattened root that divided into two separate roots in the apical area (bifid root). Conclusions: Thorough knowledge of the internal anatomy in maxillary first premolars as well as the possible particularities represent the key factor in a successful endodontic outcome. Endodontic systems specific to every population can guide the clinician in approaching the endodontic procedures starting with the access cavity, then shaping an cleaning and of course the root canal filling technique in order to seal the entire endodontic system.