Author

Dana Hawley

Date of Award

2006

Degree Type

Thesis

Degree Name

Master of Clinical Dentistry

Program

Orthodontics

Supervisor

Dr. Lesley Short

Abstract

The purpose of this study was to determine if the stability of moderately crowded Class I dental malocclusion is affected by whether or not mandibular anterior reproximation was part of the treatment. The reproximation sample consisted of twenty-nine subjects and the no reproximation sample consisted of thirty subjects. Study model analyses were conducted prior to commencement of treatment, at the completion of treatment, and two years after treatment was completed. The data were analyzed using ANCOVA to determine if any significant differences existed between the treatment groups for measures of stability. The results showed that there was a statistically and clinically significant difference in stability between the two groups based on changes in the lower anterior PAR score from end of treatment (T2) to two years post-treatment (T3). The lower incisor irregularity, although clinically significant, did not show a statistically significant difference between the treatment groups. This may have been due to the power of the study.

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