Crown root angulation of mandibular premolars using cbct

Aim: the aim of this research was to find the crown root angulation of madibular premolars using CBCT.
Materials and methods: 68 CBCT scans were collected from Saveetha dental college, Chennai. The crown root angulation of the madibular molars were measured from these CBCT scans.
Results: The mean angle of mandibular first premolar was in 46.80 male and 57.30 in female. The mean angle of mandibular second premolar was in male 46.80 and 57.30 in female.
Conclusion: It is important to know the crown root angulation to prevent deviated access opening and perforation of the canal. It also helps in reducing the fatigue of the instruments during cleaning and shaping of the root canals.