Assessment of the Mandibular Asymmetry in Class II Subdivision cases from a Sample Pakistani Population
Abstract
Objectives:
To determine the asymmetry of Mandibular condyle and ramus in a group of patients with Class II subdivision malocclusion
To evaluate the difference in the prevalence of Class II subdivision malocclusion on either side of the mandible
Methodology
This was a cross-sectional (comparative) study carried out for six months from 20th September 2015 to 20th March 2016 at the Department of Orthodontics, Sindh Institute of Oral Health Sciences, Jinnah Sindh Medical University.
History, Clinical examination, intraoral photographs and plaster models were used to classify the patients according to their malocclusion. Orthopantomogram (OPG) that are routinely taken for orthodontic patients’ records were used for this study. Andcondyle, ascending ramus and both sides of the corpus were traced. The condylar height, ramal height, and gonial angles were measured and the asymmetry index computed.
Results:
A total of 80 patients (34 males and 46 females) were taken in the age range of 12-26 years. There were no statistically significant differences found for male and female subjects compared. Class I and Class II subdivision groups were computed for the heights of Condylar process, Ramus and Gonial angles were measured followed by asymmetry index calculation in both groups, among the values statistically significant differences were found for condylar height (p=0.021), ramal height (p<0.001), condylar height index (p<0.001) and ramal height index (p=0.014) whereas, values including gonial angle, condylar height plus ramal height and Condylar height plus ramal height index values were statistically insignificant. The results showed for Class I group longer values of gonial angle, ramal height and condylar-plus-ramal height measurements.
Conclusion:
Class II subdivision patients have significant differences for the Ramal height, Condylar height, Condylar height index and Ramal height index, when compared to normal occlusion sample.
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