中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2013年
11期
689-693
,共5页
锥束计算机体层摄影术%牙测量学%转矩角%轴倾角
錐束計算機體層攝影術%牙測量學%轉矩角%軸傾角
추속계산궤체층섭영술%아측량학%전구각%축경각
Cone-beam computed tomography%Odontometry%Torque angle%Inclination angle
目的 比较锥形束CT牙齿影像长度和牙体实际长度的差异,为口腔临床应用锥形束CT进行诊断和治疗提供参考.方法 选取160颗因正畸拔除的单根或融合单根前磨牙,数显游标卡尺测量离体牙实际长度,采用随机数字表法分10次,每次16颗牙,排列于人颅骨标本上下颌磨牙区、前磨牙区、尖牙区和前牙区共8个分区,拍摄锥形束CT,测量锥形束CT冠状位、矢状位上牙齿的影像长度,并与牙齿实际长度进行比较.结果 锥形束CT冠状位结果显示,除上下颌前磨牙区牙齿影像长度与实际长度差异无统计学意义(P＞0.05)外,其余6个分区牙齿影像长度均显著小于实际长度(P＜0.05)；矢状位结果显示,上下颌磨牙区、下颌前磨牙区、下颌尖牙区、下颌前牙区牙齿影像长度[分别为(20.41 ±1.71)、(18.78 ±2.67)、(18.90±1.99)、(20.30±1.50)、(20.01 ±1.98) mm]均显著小于实际长度[分别为(21.77±1.60)、(21.37 ±1.53)、(21.70±1.38)、(21.41±1.72)、(21.42±1.90) mm] (P ＜0.05).牙齿颊舌向转矩角与锥形束CT冠状位上的牙齿影像长度存在相关性(Spearman相关系数为7.00,P＜0.001)；牙齿近远中轴倾角与锥形束CT矢状位上的牙齿影像长度存在相关性(Spearman相关系数为0.624,P＜0.001).结论 应用锥形束CT测得的牙齿影像长度小于牙齿实际长度.牙齿轴倾角和转矩角可影响锥形束CT牙齿影像长度的准确性.
目的 比較錐形束CT牙齒影像長度和牙體實際長度的差異,為口腔臨床應用錐形束CT進行診斷和治療提供參攷.方法 選取160顆因正畸拔除的單根或融閤單根前磨牙,數顯遊標卡呎測量離體牙實際長度,採用隨機數字錶法分10次,每次16顆牙,排列于人顱骨標本上下頜磨牙區、前磨牙區、尖牙區和前牙區共8箇分區,拍攝錐形束CT,測量錐形束CT冠狀位、矢狀位上牙齒的影像長度,併與牙齒實際長度進行比較.結果 錐形束CT冠狀位結果顯示,除上下頜前磨牙區牙齒影像長度與實際長度差異無統計學意義(P＞0.05)外,其餘6箇分區牙齒影像長度均顯著小于實際長度(P＜0.05)；矢狀位結果顯示,上下頜磨牙區、下頜前磨牙區、下頜尖牙區、下頜前牙區牙齒影像長度[分彆為(20.41 ±1.71)、(18.78 ±2.67)、(18.90±1.99)、(20.30±1.50)、(20.01 ±1.98) mm]均顯著小于實際長度[分彆為(21.77±1.60)、(21.37 ±1.53)、(21.70±1.38)、(21.41±1.72)、(21.42±1.90) mm] (P ＜0.05).牙齒頰舌嚮轉矩角與錐形束CT冠狀位上的牙齒影像長度存在相關性(Spearman相關繫數為7.00,P＜0.001)；牙齒近遠中軸傾角與錐形束CT矢狀位上的牙齒影像長度存在相關性(Spearman相關繫數為0.624,P＜0.001).結論 應用錐形束CT測得的牙齒影像長度小于牙齒實際長度.牙齒軸傾角和轉矩角可影響錐形束CT牙齒影像長度的準確性.
목적 비교추형속CT아치영상장도화아체실제장도적차이,위구강림상응용추형속CT진행진단화치료제공삼고.방법 선취160과인정기발제적단근혹융합단근전마아,수현유표잡척측량리체아실제장도,채용수궤수자표법분10차,매차16과아,배렬우인로골표본상하합마아구、전마아구、첨아구화전아구공8개분구,박섭추형속CT,측량추형속CT관상위、시상위상아치적영상장도,병여아치실제장도진행비교.결과 추형속CT관상위결과현시,제상하합전마아구아치영상장도여실제장도차이무통계학의의(P＞0.05)외,기여6개분구아치영상장도균현저소우실제장도(P＜0.05)；시상위결과현시,상하합마아구、하합전마아구、하합첨아구、하합전아구아치영상장도[분별위(20.41 ±1.71)、(18.78 ±2.67)、(18.90±1.99)、(20.30±1.50)、(20.01 ±1.98) mm]균현저소우실제장도[분별위(21.77±1.60)、(21.37 ±1.53)、(21.70±1.38)、(21.41±1.72)、(21.42±1.90) mm] (P ＜0.05).아치협설향전구각여추형속CT관상위상적아치영상장도존재상관성(Spearman상관계수위7.00,P＜0.001)；아치근원중축경각여추형속CT시상위상적아치영상장도존재상관성(Spearman상관계수위0.624,P＜0.001).결론 응용추형속CT측득적아치영상장도소우아치실제장도.아치축경각화전구각가영향추형속CT아치영상장도적준학성.
Objective To evaluate the accuracy of cone-bean CT(CBCT) on the measurement of the tooth length.Methods One hundred and sixty single root premolars extracted for orthodontic purposes were selected.The tooth length was measured with vernier caliper.The premolars were divided into 10 groups randomly,16 premolars in each group.In each group,the teeth were lined in molar area,premolar area,canine area and anterior tooth area in maxilla and mandible.Then CBCT was taken,and the tooth length was measured using the software supplied by the manufacturer in coronal and sagittal plane.Accuracy was compared between vernier caliper measurement and CBCT measurement.Results The tooth length measured by CBCT was smaller than that measured with the vernier caliper.Significant differences were found in six areas,except the maxillary and mandibular premolar areas.With the increase of mesial-distal inclination or buccolingual torque angle,the difference between tooth length measured by CBCT and that measured with vernier caliper increased.The correlation between buccolingual torque angle(∠X1) and the coronal view of CBCT radiology tooth length (Spearmen index was 7.00,P ＜ 0.001),and the correlation between mesialdistal inclination and the coronal view of CBCT radiology tooth length (Spearmen index was 0.624,P ＜0.001) were found.Conclusions The tooth length measured by CBCT was smaller than that measured with vernier caliper.
