摘要
目的横向调查安氏Ⅱ类错畸形正畸人群中正中关系(CR)位与最大牙尖交错(MI)位不一致的比例及严重程度,为制定临床治疗计划提供参考。方法选取符合纳入标准的安氏Ⅱ类错患者80例,以及个别正常人50例。使用双手法配合负荷试验取得所有受检者CR位的咬合记录,使用Panadent架将所有受检者的牙科模型在CR位上架并进行分析。采用髁突位置测量仪(CPI)测量并记录每个受检者CR位与MI位的髁突位置在三维方向上的差异。结果 1)安氏Ⅱ类错组有74例患者存在CR-MI不调,阳性率为92.50%;个别正常组仅有5例,阳性率为10.00%,二者差异有统计学意义(P<0.001)。2)安氏Ⅱ类错组中,55例的CR-MI不调类型为一致性不调,占74例CR-MI不调患者的74.32%。3)安氏Ⅱ类错组与个别正常组的干扰大多数位于后牙区,分别占91.25%和66.00%。结论进行正畸治疗前有必要分析安氏Ⅱ类错畸形患者CR-MI的一致性,以制定出正确的治疗计划。
Objective This study investigates the differences in condylar position between centric relation（CR） and maximum intercuspation（MI） in Angle＇s Class Ⅱ orthodontic patients before treatment.Methods 80 cases,who were Angle＇s Class Ⅱ pretreatment patients,and 50 cases,who were normal（ideal） o7cclusion were accepted.Dental casts were mounted on Panadent articulator with CR bite record,taken by bilateral manipulation and load testing.The differences in condylar position between CR and MI in all three spatial planes were measured using the Panadent condylar position indication（CPI）.Results 1）The positive rate of CR-MI discrepancy was 92.50%（74 cases） in the group of Angle＇s Class Ⅱ malocclusion and 10.00%（5 cases） in the group of normal occlusion（P0.001）.2）74.32%（55 cases） CR-MI discrepancy in 74 cases in the group of Angle＇s Class Ⅱ pretreatment patients were coincidence discrepancy.3）91.25% patients in the group of Angle＇s Class Ⅱ malocclusion and 66.00% in the group of normal occlusion present occlusion interferences which located at the posterior teeth.Conclusion The results suggested that orthodontists should be aware of a high incidence of condylar displacement in Angle＇s Class Ⅱ pretreatment patients,and measure condylar displacement before the start of comprehensive orthodontic treatment to unmask real jaw relationships and avoid possible misdiagnoses.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2011年第1期48-52,共5页
West China Journal of Stomatology
关键词
正中关系位
安氏Ⅱ类错
髁突位置测量仪
centric relation
Angle＇s Class Ⅱ malocclusion
condylar position indication
