CBCT Study on Three Dimensional Alveolar Bone Changes and Root Absorption of Maxillary Incisors in Patients with Class Ⅱ Division 1 Malocclusion

doi:10.13701/j.cnki.kqyxyj.2019.08.017

Abstract

Abstract: Objective: To compare the three dimensional bone changes of maxillary incisors in patients with class Ⅱ division 1 malocclusion before and after orthodontic treatment, and to observe the root absorption and dehiscence/fenestration. Methods: Standard samples were collected. The height and thickness of alveolar bone were measured. The change of root length was observed. Results: The height of alveolar bone in mesial and distal side was greater than that of buccal and lingual side. The dehiscence was less than 2mm on the buccal/lingual side and no fenestration was seen. After orthodontic treatment, the three dimensional alveolar bone changes were observed. The height and thickness of the alveolar bone in lingual side were reduced. The dehiscence in lingual side was increased. The orthodontic treatment caused a certain degree of root absorption. Conclusion: Orthodontic treatment caused the decrease of height and thickness of alveolar bone. The dehiscence in lingual side was increased. The orthodontic treatment caused a certain degree of root absorption. However, it basically does not affect the periodontal health of anterior teeth.

Key words: Malocclusion, Alveolar bone, Dehiscence

CHEN Liangjiao, WANG Zhaojian, HE jingyi, DENG Yulian, FENG Zijun. CBCT Study on Three Dimensional Alveolar Bone Changes and Root Absorption of Maxillary Incisors in Patients with Class Ⅱ Division 1 Malocclusion[J]. Journal of Oral Science Research, 2019, 35(8): 794-797.

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