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2000
Volume 3, Issue 1
  • ISSN: 2542-579X
  • E-ISSN: 2542-5803

Abstract

Introduction

Correction of skeletal Class II malocclusion generally requires extraction of the premolars, followed by retraction of the anterior teeth to reduce overjet. Morphometric evaluation of alveolar bone can be used to study the limitation of tooth movement to avoid adverse effects. The purpose of this study is to measure the changes in the bone thickness of the maxillary incisors in skeletal Class II malocclusion patients after retraction and determine the relationship between changes in bone thickness and the amount of retractions using lateral cephalometric radiographs.

Materials and Methods

This study was designed to determine the cross-sectional changes in bone thickness in linear directions after retraction, and the relationship between changes in bone thickness and the amount of retraction. Bone thickness in the linear directions was measured using digital cephalometric radiographs.

Results

The measurement results from tracing 43 lateral cephalometric before and after anterior retraction treatment showed a difference in alveolar bone thickness at the 9mm level from the CEJ in a linear direction on the anterior retraction of skeletal Class II malocclusion maxillary incisors ( <0.05); however, there was no difference observed in alveolar bone thickness at levels 3 and 6 mm from CEJ in the linear direction and in the angular direction (> 0.05). Changes in alveolar bone thickness did not correlate with the amount of incisor retraction (> 0.05).

Conclusion

The results showed the change in labial alveolar bone thickness was not significantly correlate with the amount of retraction.

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2021-06-16
2025-09-04
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  • Article Type:
    Research Article
Keyword(s): alveolar; anterior; bone; class II malocclusion; retraction; Skeletal
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