A prospective study of the Various Categories of Crown to Root Ratio of Premolars by Using Cone Beam CT Images

Background: Cone beam computed tomography (CBCT) has gained worldwide acceptance in the field of dentistry, because it provides definite images form slices single roots which can accurately measure crown and root lengths all teeth including premolars. Crown have its applications surgical extrusion lengthening cases tooth wear. Aim: To document frequency crown-root ratio (using CBCT images) longitudinal section premolar teeth. Study design: Descriptive cross-sectional study. Place duration study: Department Radiology, Khyber College Dentistry Hospital, Peshawar Sardar Begum Dental Hospital from 1st January 2020 to 30th June 2020. Methodology: One hundred thirty five patients both genders were selected by obtaining there images. A written informed consent was taken or their attendants through concerned dentist who advised CBCT. Data recorded categorical variables (crown length). Results: The mean age 29.64±4.47 years. highest 28(14.8%) years 29(17%) There 87(64.4%) males while 48(35.5%) females. Conclusion: is significant difference between premolars maxilla mandible right left quadrants arches. Key words: (CBCT), crown-to-root (CRR), Premolar