CAJ | 학술논문

目的研究正颌外科手术中常用软硬组织三维头影测量标志点的可重复性,为精确的正颌外科三维头影测量提供参考依据.方法选取59名颅颌面骨骼及咬合关系正常的志愿者拍摄螺旋CT,并三维重建.由同一研究者选取54个头影测量标志点进行定点测量,共3次,每次间隔一周.共定点3186个,每个点包括x,y,z三个坐标数据,共获取数据9558个.采用组间相关系数(InterclassCorrelation,ICC)进行一致性检验,研究每个标志点测量的可重复性.结果 86.5％的标志点ICC值大于0.9,其中硬组织标志点与软组织标志点分别为86.4％和87.0％.软硬组织标志点在各个轴向定点的可重复性最好的是上下方向,最差的是前后方向.结论计算机三维头模上软硬组织标记点的确定具有较高的可重复性,能准确地反映头颅软硬组织的真实情况.
목적 연구정합외과수술중상용연경조직삼유두영측량표지점적가중복성,위정학적정합외과삼유두영측량제공삼고의거.방법 선취59명로합면골격급교합관계정상적지원자박섭라선CT,병삼유중건.유동일연구자선취54개두영측량표지점진행정점측량,공3차,매차간격일주.공정점3186개,매개점포괄x,y,z삼개좌표수거,공획취수거9558개.채용조간상관계수(InterclassCorrelation,ICC)진행일치성검험,연구매개표지점측량적가중복성.결과 86.5％적표지점ICC치대우0.9,기중경조직표지점여연조직표지점분별위86.4％화87.0％.연경조직표지점재각개축향정점적가중복성최호적시상하방향,최차적시전후방향.결론 계산궤삼유두모상연경조직표기점적학정구유교고적가중복성,능준학지반영두로연경조직적진실정황.
Objective To study the Reproducibility of landmarks of soft and hard tissueso as to provide reference to accurate three-dimensional cephalometric analysis for orthognathic surgery.Methods The study population consisted of 59 volunteers examined with spiral 3D computed tomography (CT).For each analysis,54 cephalometric reference landmarks were identified on the three spatial axes(x,y,z).All the identifications were performed by the same observer.This was repeated three times during 3 sessions at least 1 week apart.In total,3186 imaging measurements were taken,as each determination has 3 coordinates,9558 data were processed with SAS9.2 statistical package.To discover the reproducibility of the method on landmark location,an ICC was undertaken using one variation factors:time (t1,t2 and t3) for each axis (x,y,z) and landmark.Results The ICC was＞0.9 for 86.48％ of all the landmarks,which with high reliability.The ICC was ＞0.9 for 86.38 ％of the hard tissue landmarks,and for 87 ％ of the soft tissue landmarks.The reproducibility of landmarks in three axis was z＞x＞y.Those with lower ICC were Me*,Zy* R,Zy* L and ZyL.Conclusions Three dimensional landmark identification using CT can offer consistent and reproducible data so as to create cephalometric analyses reflectingthe 3D reality.