天津医药
天津醫藥
천진의약
TIANJIN MEDICAL JOURNAL
2015年
4期
390-392,393
,共4页
错 ,安氏Ⅲ类%体层摄影术,X线计算机%图像处理,计算机辅助%牙根吸收%唇倾角度
錯 ,安氏Ⅲ類%體層攝影術,X線計算機%圖像處理,計算機輔助%牙根吸收%脣傾角度
착 ,안씨Ⅲ류%체층섭영술,X선계산궤%도상처리,계산궤보조%아근흡수%진경각도
malocclusion,angle classⅢ%tomography,X-ray computed%image processing,computer-assisted%root re-sorption%labially tilted angle
目的：通过锥形束CT（CBCT）影像进行交互式医学影像控制系统（Mimics）的三维重建，为临床矫治中切牙唇倾角度控制及正颌手术中骨块移动量设计提供理论参考。方法对30例采用正畸-正颌联合治疗的成人骨性Ⅲ类患者正畸去代偿前后分别拍摄CBCT，使用Mimics 10.01软件对前牙进行三维重建并以釉牙骨质界分离牙冠和牙根，分别测量正畸去代偿前后的上下切牙唇倾角度及牙根体积。通过统计学方法得出正畸去代偿前后牙根体积变化量与唇倾角度变化量之间的量化关系。结果上下切牙牙根体积在去代偿后发生了明显减小，差异有统计学意义；不同性别及不同牙位牙根体积的变化差异无统计学意义；当切牙唇倾角度变化量达到7°及以上时，牙根体积的改变量与唇倾角度改变量之间存在线性关系并满足=-21.416+5.618X。结论成人骨性Ⅲ类错正畸去代偿后当前牙唇倾角度发生7°及以上的变化时切牙牙根发生明显吸收。
目的：通過錐形束CT（CBCT）影像進行交互式醫學影像控製繫統（Mimics）的三維重建，為臨床矯治中切牙脣傾角度控製及正頜手術中骨塊移動量設計提供理論參攷。方法對30例採用正畸-正頜聯閤治療的成人骨性Ⅲ類患者正畸去代償前後分彆拍攝CBCT，使用Mimics 10.01軟件對前牙進行三維重建併以釉牙骨質界分離牙冠和牙根，分彆測量正畸去代償前後的上下切牙脣傾角度及牙根體積。通過統計學方法得齣正畸去代償前後牙根體積變化量與脣傾角度變化量之間的量化關繫。結果上下切牙牙根體積在去代償後髮生瞭明顯減小，差異有統計學意義；不同性彆及不同牙位牙根體積的變化差異無統計學意義；噹切牙脣傾角度變化量達到7°及以上時，牙根體積的改變量與脣傾角度改變量之間存在線性關繫併滿足=-21.416+5.618X。結論成人骨性Ⅲ類錯正畸去代償後噹前牙脣傾角度髮生7°及以上的變化時切牙牙根髮生明顯吸收。
목적：통과추형속CT（CBCT）영상진행교호식의학영상공제계통（Mimics）적삼유중건，위림상교치중절아진경각도공제급정합수술중골괴이동량설계제공이론삼고。방법대30례채용정기-정합연합치료적성인골성Ⅲ류환자정기거대상전후분별박섭CBCT，사용Mimics 10.01연건대전아진행삼유중건병이유아골질계분리아관화아근，분별측량정기거대상전후적상하절아진경각도급아근체적。통과통계학방법득출정기거대상전후아근체적변화량여진경각도변화량지간적양화관계。결과상하절아아근체적재거대상후발생료명현감소，차이유통계학의의；불동성별급불동아위아근체적적변화차이무통계학의의；당절아진경각도변화량체도7°급이상시，아근체적적개변량여진경각도개변량지간존재선성관계병만족=-21.416+5.618X。결론성인골성Ⅲ류착정기거대상후당전아진경각도발생7°급이상적변화시절아아근발생명현흡수。
Objective To evaluate incisor root resorption of adults with skeletal classⅢmalocclusion through three-dimensional reconstruction of cone beam computed tomography (CBCT) image using interacting medical imaging control sys?tem (Mimics) and then offer guidance for labially tilted angle control in orthodontic treatment and distance of bone moving in surgery. Methods Adults of skeletal class Ⅲ malocclusion (n=30) who underwent orthodontic-orthognathic combination treatment were included in this study. CBCT images were then reconstructed three-dimensionally using Mimics 10.01. Each incisor were separated at cementum-enamel junction as crown and root. Labially tilted angle and root volumes of each inci?sor were measured before and after operations. At last, the correlativity between root resorption and labially tilted angle was calculated through statistic analysis. Results The decrement of upper, lower and front incisors’root volumes upon treat?ment is statistically significant. However, there is no statistically significant difference of incisor ’s root volumes among eight incisors nor between different gender. There is linear correlation between root volumes and labially tilted angle when the lat?ter changes 7° or more when they followed the fomular =-21.416+5.618X. Conclusion For adults with skeletal classⅢmalocclusion, orthodontic treatment before orthognathic surgery decrease incisor root volumes when labially tilted angle changes 7° or more.
