Radiographic evaluation of permanent second molar development based on nollas stage of tooth development in 9-11-year-old male children

Abstract

The aim of this study is to radiographically evaluate the second molar development based on the NOLLAS stage of tooth development in 9-11-year-old male children. For this, a total of 400 orthopantomography (OPG) images were collected from the database record of Saveetha dental college. Of these 40 OPGs were selected based on the age group between 9 to 11 years old male children. The dental age of the 2nd molar was calculated based on the NOLLAS loss stage of tooth development. After data collection, statistical analysis was done in the SPSS software. Among the study population, 33.90% were nine years old, 33.90% was ten years old, and 32.20% were 11 years old. Considering the distribution of teeth assessed majority were lower left second molar - 37 (32.20%) and least were upper left second molar-27(16.95%). Majority of the teeth attained maximum development at stage 9 (pink)-25.42%, least maturation assessed at stage 7-6.78%. The association between nollas stage and age was statistically significant (P-value of 0.000, p < 0.05). The association between nollas stage and tooth number was statistically not significant (P value of 0.106, p > 0.05). Majority of the children in the age group of 9 years had 'crown almost completed' in second molar (Stage 5), majority of 10-year-old children had 'two-third root completed' in second molar (Stage 8) and majority of 11-year-old children had ' root completed with open apex' in second molar (Stage 9).