CAJ | 학술논문

背景:正确评价上下颌骨基骨的矢状位置关系在正畸患者的诊断和治疗过程中是十分重要的.目前临床常用来评价上下颌骨矢状方向位置关系的指标主要为ANB角、AXB角、Beta角和APDI值,相关性及变异度分析是判断这些指标可靠性的重要方法.目的:比较ANB角、AXB角、Beta角和APDI值评估替牙期安氏Ⅲ类错(牙合)患者上下颌骨矢状位置关系的可靠性.方法:选择2004-01/2009-06在新疆医科大学第一附属医院口腔就诊的替牙期安氏Ⅲ类错(牙合)畸形患者共计56例,所有患者的头颅定位侧位片均由同一熟练技师严格按要求在同一机器上拍摄.用Microtek纷腾9800 XL扫描仪以1:1比例,300 dpi象素对胶片进行扫描,扫描结果以Jpg格式存盘,由第一作者用Photoshop 8 0图像处理软件对导入计算机中的图片进行定点,测量ANB角、AXB角、Beta角和APDI值,每项指标测量3次,最后取平均值.对测量结果进行相关性及变异度分析.结果与结论:替牙期安氏Ⅲ类错(牙合)患者的ANB角、AXB角、Beta角和APDI值之间均存在相关性(P＜0.05);4项测量指标的变异程度不同,ANB角、AXB角、Beta角和APDI值的变异系数分别为1.35,0.75,0.07和0.04.结果提示,ANB角、AXB角、Beta角和APDI值在评价替牙期安氏Ⅲ类错(牙合)畸形颌骨矢状关系时均具有一定的准确性,而APDI值的可靠性更好.
배경:정학평개상하합골기골적시상위치관계재정기환자적진단화치료과정중시십분중요적.목전림상상용래평개상하합골시상방향위치관계적지표주요위ANB각、AXB각、Beta각화APDI치,상관성급변이도분석시판단저사지표가고성적중요방법.목적:비교ANB각、AXB각、Beta각화APDI치평고체아기안씨Ⅲ류착(아합)환자상하합골시상위치관계적가고성.방법:선택2004-01/2009-06재신강의과대학제일부속의원구강취진적체아기안씨Ⅲ류착(아합)기형환자공계56례,소유환자적두로정위측위편균유동일숙련기사엄격안요구재동일궤기상박섭.용Microtek분등9800 XL소묘의이1:1비례,300 dpi상소대효편진행소묘,소묘결과이Jpg격식존반,유제일작자용Photoshop 8 0도상처리연건대도입계산궤중적도편진행정점,측량ANB각、AXB각、Beta각화APDI치,매항지표측량3차,최후취평균치.대측량결과진행상관성급변이도분석.결과여결론:체아기안씨Ⅲ류착(아합)환자적ANB각、AXB각、Beta각화APDI치지간균존재상관성(P＜0.05);4항측량지표적변이정도불동,ANB각、AXB각、Beta각화APDI치적변이계수분별위1.35,0.75,0.07화0.04.결과제시,ANB각、AXB각、Beta각화APDI치재평개체아기안씨Ⅲ류착(아합)기형합골시상관계시균구유일정적준학성,이APDI치적가고성경호.
BACKGROUND:It is very important to appreciate the Sagittal discrepancy during the diagnosis and therapy in orthodontics patients.At present,ANB angle,AXB angle,Beta angle and APDI value were often used to evaluate the mandible and maxilla relationships in orthodontic clinic.Correlation and variance degree among these parameters were analyzed to judge the reliability.OBJECTIVE:To compare the reliability of ANB angle,AXB angle,Beta angle and APDI value in assessing sagittal discrepancy between mandible and maxilla in transitional dentition cases with Angle's class Ⅲ malocclusion.METHODS:Totally 56 patients of Angle's class Ⅲ malocclusion in transitional dentition at the Department of Orthodontics,First Affiliated Hospital of Xinjiang Medical University,between January 2004 and June 2009,were selected.ANB angle,AXB angle,Beta angle and APDI value of Angle's class Ⅲ malocclusion in transitional dentition were measured on the cephalometric radiographs.The radiographs were scanned by Microtek Phantom 9800 XL scanner at proportion of 1:1 with 300 dpi pixels,and saved as JPG format.The JPG pictures were fixed-point using Photoshop 8.0 to measure ANB angle,AXB angle,Beta angle and APDI value,the mean value was obtained after 3 times measurement.The correlation and variance degree among these parameters were analyzed.RESULTS AND CONCLUSION:Significant correlation was found among ANB angle,AXB angle,Beta angle and APDI value (P＜0.05).The coefficients of variation for the 4 indexes were 1.35,0.75,0.07 and 0.04,respectively.The results demonstrated that,it is accurate to use ANB angle,AXB angle,Beta angle and APDI value as cephalometric norm to evaluate sagittal discrepancy of maxmandibul in transitional dentition cases with Angle's class Ⅲ malocclusion.However,the APDI value is more reliable as cephalometric norm.