摘要
目的:通过锥形束计算机断层扫描技术(cone-beam computed tomography,CBCT)研究安氏Ⅰ类双颌前突成人患者切牙区牙槽骨形态及厚度,为正畸治疗中牙齿移动提供参考。方法:选取未治疗安氏Ⅰ类双颌前突成人患者18例,个别正常15例。拍摄头颅侧位片测量头颅侧位数据,用CBCT获得三维影像数据,分析上、下颌8颗切牙唇、舌侧牙槽骨厚度。结果:双颌前突患者ANB角较大(P<0.05),下颌切牙唇倾度和下颌平面角也较大(P<0.05);上、下颌中切牙和侧切牙根尖牙槽骨总厚度分别为(8.35±1.31)mm、(7.60±1.39)mm、(7.12±1.03)mm、(7.24±0.77)mm,均小于正常(9.29±1.82)mm、(8.51±1.12)mm、(7.90±1.17)mm、(7.79±0.82)mm(P<0.05);上、下颌切牙牙槽嵴顶和根中牙槽骨唇侧厚度均小于正常,舌侧差异较小。结论:成人安氏Ⅰ类双颌前突患者切牙区牙槽骨较为狭窄,制定矫治计划和切牙内收时应更加谨慎。
Objective： To investigate the structure of alveolar bone around incisors in adult patients with Class I bimaxillary protru- sion. Methods： 18 cases with bimaxillary protrusion and 15 cases（control） with individual normal occlusion were enrolled. Lateral cephalograms and CBCT scanning were made. The cephalometric data and thickness of the labial and lingual alveolar bone of the 8 inci- sors in each subject were analyzed. Results： In patients with class I bimaxillary protrusion ANB angle, libioclination and mandibular plane angle were bigger than in the controls（P 〈 0.05）. The total width of alveolar process bone at the root apical level of maxillary and mandibular incisors in the patients was thinner than in the controls （P 〈 0.05） ; Labial thickness of alveolar bone at the crest and root midpoint was thinner in case group than in the control, but there was no significant difference in lingual thickness between 2 groups. Conclusion： The alveolar bone thickness around incisors of adult patients with Class Ⅰ bimaxillary protrusion is thinner than in the subjects with norm occlusion.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2013年第3期398-402,共5页
Journal of Practical Stomatology
基金
陕西省社会发展科技攻关基金(编号:2012K16-10-06)
关键词
双颌前突
切牙
牙槽骨
锥形束CT
Bimaxillary protrusion
Incisor
Alveolar bone
Cone- beam CT（CBCT）
