CAJ | 학술논문

目的：用锥形束 CT（CBCT）在三维空间中定位阻生尖牙及确定最常见阻生类型，同时评估相邻切牙（中切牙和侧切牙）牙根吸收情况。方法：对63例患者92颗上颌阻生尖牙患者进行 CBCT 扫描，采用多平面重建（MPR）获得三维重建图像。在矢状、冠状、轴切面视图中，设定 X，Y，Z 平面，并对每个阻生尖牙牙尖定位，观察相邻切牙牙根吸收状况。结果：在 X 平面中：92％偏近中阻生，阻生距离10．4～15．1 mm，8％偏远中阻生，阻生距离2～5 mm；在 Z 平面中：60％偏腭侧阻生，阻生距离1～4 mm，40％偏唇侧阻生，阻生距离0～4 mm。相邻切牙牙根41．3％无吸收，36．5％轻微吸收，14．3％中度吸收，7．9％重度吸收。结论：上颌阻生尖牙最常发生于腭侧、近中，多伴有相邻切牙牙根吸收。
목적：용추형속 CT（CBCT）재삼유공간중정위조생첨아급학정최상견조생류형，동시평고상린절아（중절아화측절아）아근흡수정황。방법：대63례환자92과상합조생첨아환자진행 CBCT 소묘，채용다평면중건（MPR）획득삼유중건도상。재시상、관상、축절면시도중，설정 X，Y，Z 평면，병대매개조생첨아아첨정위，관찰상린절아아근흡수상황。결과：재 X 평면중：92％편근중조생，조생거리10．4～15．1 mm，8％편원중조생，조생거리2～5 mm；재 Z 평면중：60％편악측조생，조생거리1～4 mm，40％편진측조생，조생거리0～4 mm。상린절아아근41．3％무흡수，36．5％경미흡수，14．3％중도흡수，7．9％중도흡수。결론：상합조생첨아최상발생우악측、근중，다반유상린절아아근흡수。
Objective:To localize the impacted maxillary canine and to observe the root resorption of adjacent incisor in 3 dimen-sions using cone beam computed tomography(CBCT).Methods:92 impacted maxillary canines in 63 patients were scanned by CBCT.The three-dimensional images were obtained by multiplanar reconstructions(MPR).The cusp tip of each impacted canine was localized and set to the X,Y and Z planes after the observation of sagittal,coronal and axial views.The root resorption of adjacent in-cisors was observed.Results:In the X-axis,92% of impactions were mesial by 1 0.4 to 1 5.1 mm,8% distal by 2 to 5 mm;in the Z-axis,60% of impactions were palatal by 1 to 4 mm,40% buccal by 0 to 4 mm.41 .3% of the impacted canines were without root resorption of adjacent incisor,36.5% with slight,1 4.3% with moderate and 7.9% with severe root resorption of the adjacent inci-sor.Conclusion:The most frequent location of impacted maxillary canine is palatal and mesial with high incidence of root resorption of adjacent incisor.