三维锥体束CT评价Hyrax扩弓器治疗上颌第二前磨牙区的变化  

Cone-Beam CT Evaluation of the Changes of Upper Second Premolars after Rapid Palatal Expansion with Hyrax appliances

作　　者：赵颖[1] Armine Kartalian Elizabeth Gohl Reyes Enciso 

机构地区：[1]首都医科大学宣武医院口腔科,北京100053 [2]南加州大学牙科学院口腔正畸科

出　　处：《口腔医学研究》2009年第4期455-458,共4页Journal of Oral Science Research

基　　金：国家留学基金委全额资助项目(编号:2006100193)

摘　　要：目的:本研究旨在利用CBCT技术比较Hyrax扩弓矫治器治疗前后上颌第二前磨牙(P2)区颌-复合体宽度及牙齿、牙槽嵴倾斜度的变化。方法:23例,(女17例,男6例;平均年龄(12.70±1.89)岁上颌牙弓狭窄、后牙反的患者。所有患者经Hyrax扩弓治疗,治疗前后采用CBCT技术采集并重建双侧P2区的三维结构,测量牙齿、牙槽嵴和颌骨不同平面的宽度以及牙齿、牙槽嵴与腭骨的相关角度,然后进行配对样本t检验。结果:RPE治疗后P2区颌骨宽度变化无统计学意义;P2及其牙槽嵴宽度显著增加(p<0.001);牙齿和牙槽嵴倾斜度变化也有统计学意义(p<0.05)。结论:Hyrax扩弓器对生长发育期患者P2区颌-复合体的作用主要表现为牙齿颊倾和牙槽嵴改建,颌骨宽度变化较小。Objective： To compare the changes of transverse dimensions and the amount of alveolar and teentb tipping of upper second premolars after RPE treatment,using the Cone-Beam Computerized Tomography（CBCT） scan images.Methods： 23 patients（17 females and 6 males;mean age 12.70±1.89 years） with narrow upper arch were treated with Hyrax appliances and received CBCT scans pre-and after RPE treatment.Transverse widths and related angulations of dento-skeletal complex in P2 were measured.Matched paired t-tests were conducted. Results： RPE treatment produced a little increase in the maxillary width and significantly increase in the inter - cusp width and alveolar width （P 〈 0. 001 ）. The alveolar bending and absolute teeth tipping were statistically significant （ P 〈 0. 05 ）. Conclusions ： The effect of RPE treatment in the second upper premolar was teeth tipping and the alveolar width increases but not the maxilla width increase

关 键 词：锥体束CT 上颌横向不足 腭部快速扩弓 上颌第二前磨牙 

分 类 号：R783.5[医药卫生—口腔医学]