Vol. 5, Issue 5 (2019)
Prevalence of pulp exposures during tooth preparation for fixed dental prosthesis
Author(s): Mohammad Arif Lone, Shahnaz Lecturer, Shazana Qazi
Abstract: Purpose: The purpose of this study was to record the prevalence of pulp exposures occurring during preparation of vital abutment teeth. Materials and Methods: 2527 patients (1495 female, 1032 male) who received metal-ceramic fixed partial dentures or single crowns were included in the study. Teeth were prepared using diamond burs in a high-speed hand piece under air and water coolant. If pulpal exposure occurred, data of the patient’s gender and age, tooth number, tooth position (normal vs mal-positioned) and exposure time were recorded, and the patients were referred for immediate endodontic treatment. Data were analyzed using Chi-square test, with a confidence level set at 95% (P < 0.05). Results: Pulpal exposure occurred in 80 teeth (0.66%), Chi-square demonstrated no difference (P > 0.05) male-female exposure ratio (1:1.5). The difference in exposure between maxillary and mandibular teeth was statistically significant (P < 0.05). Only 28.75% of exposed tooth was mal-posed. The majority (n = 49, 61.25%) of exposures occurred in mandibular teeth and this was statistically significant (P < 0.05). Overall the most frequently exposed tooth was mandibular canine (20%), followed by the maxillary central incisor (13.75%) and mandibular lateral incisor (10%). Conclusions: Clinicians should undertake greater care in preparing teeth, especially mandibular canines, for fixed prosthetics. The majority (62.5%) of patients in which pulpal exposure occurred during tooth preparation were between 30-50 years old.