Aims: A study was conducted to find out a relationship between maxillary and mandibular base lengths and dental crowding in untreated Class II subjects in Mandi Gobindgarh, Punjab, population. Study design: Cross sectional. Place of Study: Department of Orthodontics and Dentofacial Orthopaedics, Desh Bhagat Dental College and Hospital, Desh Bhagat University Campus, Mandi Gobindgarh, Punjab. Methodology: This study included 32 Class II pre-treatment lateral cephalograms and study models of untreated subjects with complete bilateral dental class II malocclusion having all permanent teeth mesial to 1st molars & without any proximal decay and restorations. The maxillary and mandibular base lengths (Co-A and Co-Gn) were measured on pre-treatment lateral cephalogram & the tooth size-arch length discrepancies were measured on the pre-treatment dental casts. The measurements obtained from Class II subjects were further divided into two Groups each depending upon the severity of dental crowding. The obtained data was analyzed statistically with t-test and Pearson correlation coefficient (P=.05) to investigate any correlation between base length and dental crowding. Results: Patients with Class II malocclusion and moderate to severe crowding had significantly smaller maxillary and mandibular base lengths than subjects with same malocclusion and slight crowding. A weak inverse correlation was found between effective base lengths and severity of crowding. Conclusion: Decreased maxillary and mandibular effective lengths constitute an important factor associated with dental crowding in patients with Class II malocclusion.
Key words: Dental crowding, Class II malocclusion, and Apical base lengths.

Received: 20 March 2018                                       Revised: 8 April 2018                                    Accepted: 10 April 2018

Corresponding Author: Dr. Vishal Kumar Sharma, Post Graduate Student, Department of Orthodontics & Dentofacial Orthopaedics, Desh Bhagat Dental College and Hospital, Desh Bhagat University Campus, Mandi Gobindgarh, Punjab, India.

This article may be cited as: Sharma VK, Soni S, Bansal N, Prashar A, Kaur S, Garg V. A Relationship between Dental Crowding and Effective Base Lengths in Untreated Class II Subjects of Mandi Gobindgarh Population.  Int J Res Health Allied Sci 2018; 4(3):1-4.