An in-vivo correlation analysis of the distance between lingual frenal attachment and mandibular incisal edge position as an aid in establishing mandibular occlusal plane in South Indian population.

Abstract

The aim of the study is to find the reliability in measuring the distance between the anterior attachment of the lingual frenum and the incisal edge of the mandibular central incisor on casts to be used as a pre-extraction record. The objective of this study is to give a range of numerical values from anterior attachment of lingual frenum to mandibular central incisors in a class I ridge relation in south Indian population, which may be used in establishing the vertical dimension of the edentulous patient and also to locate the mandibular incisors in teeth arrangement of complete denture fabrication. One hundred subjects (50 males and 50 females) under the age group of 21-28y, with class I dental relationship and who have never undergone orthodontic treatment were selected. Two models were made for each subject using irreversible hydrocolloid impression material and type III gypsum product to obtain an average value for each subject. The distance between the incisal edges of the lower central incisor and the anterior attachment of the lingual frenum is measured using a divider and digital vernier caliper. Mean and Standard deviation using descriptive statistics tool using SPSS software version 18. The distance between the anterior attachment of the lingual frenum and incisal edges of mandibular central incisors among the 100 subjects was 14.50mm ± 2.2245 mm. The value obtained aided in establishing the vertical dimension easier by making a pre-determined height of mandibular occlusal rim.