安氏Ⅰ类拔牙正畸治疗牙槽嵴高度变化的CBCT研究

doi:10.13591/j.cnki.kqyx.2022.11.010

Abstract

Abstract: Objective To analyze the alveolar ridge height of adults and adolescents who accept extraction during orthodontic treatment by cone beam CT(CBCT) in order to explore the difference of extraction-related alveolar bone loss between adults and adolescents. Methods A total of 40 Angle's Class Ⅰ orthodontic patients were included in the study (20 adults and 20 teenagers), and 4 first premolars were extracted for each subject during orthodontic treatment. The buccal and lingual faces of the remaining 20 teeth of each patient were measured by CBCT before and after treatment respectively. Results Among 3 200 root surfaces measured, the height of alveolar bone in the anterior area was significantly decreased in adults after orthodontic treatment; the quantity of dehiscence in adults before orthodontic treatment was 210, and the number was 477 after treatment. The number of adolescents with bone dehiscence before orthodontic treatment was 14, and after tooth extraction and orthodontic treatment the number was 40. Conclusion In adult patients, orthodontic extraction treatment reduces the height of alveolar bone in the anterior part of dental arch. However, in the adolescent group, no significant difference is detected in the dental arch before and after orthodontic treatment.

Key words: orthodontic extraction treatment, alveolar bone height, CBCT

CLC Number:

R783.5

LIU Weiwei, MA Junqing. CBCT-assisted evaluation of distance from cementoenamel junction to alveolar crest in Class Ⅰ extraction cases[J]. Stomatology, 2022, 42(11): 1011-1014.

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CBCT-assisted evaluation of distance from cementoenamel junction to alveolar crest in Class Ⅰ extraction cases

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