Frequency of bicuspid and tricuspid form of mandibular second premolar at Khyber College of Dentistry Peshawar

Objectives: to determine the frequency of the two morphological forms of mandibular 2nd premolar (bicuspid & tricuspid) for academic and clinical purposes. materials and methods: this study was carried out in the oral biology department of khyber college of denitstry,peshawar from january 2011 to may 2011. a total of 372 participants (patients attending khyber college of dentistry and students of khyber college of dentistry) were included in the study. participants were examined in the ordinary chair using torch light and mouth mirror. the findings were noted on the special proforma developed to collect the data. the study was approved by the ethical committee of khyber college of dentistry. results: the frequency of bicuspid and tricuspid form of mandibular 2nd premolar was 61.55% and 38.45% respectively. conclusion: more than one-third of the mandibular 2nd premolars were tricuspid. the frequency of tricuspid form of mandibular 2nd premolar was more in females than males.