安氏Ⅲ类错患者颏部X线形态与手术治疗适应证的研究  

Correlative Study between Shape of Chin and Indications for Orthognathic Surgery in Class Ⅲ Adult Patients

作　　者：李孝英[1] 彭诚[1] 孙燕[2] 

机构地区：[1]天津医科大学第二医院口腔科,300211 [2]大连医科大学附属口腔医院

出　　处：《天津医药》2010年第7期587-589,共3页Tianjin Medical Journal

摘　　要：目的:研究安氏Ⅲ类错成人患者颏部突度指标与手术适应证的关系,筛选影响手术治疗适应证的颏部形态指标。方法:抽取安氏Ⅲ类错成人患者61例,其中39例接受单纯正畸治疗(非手术组),22例接受正畸正颌联合治疗(手术组)。分别对2组治疗前头颅侧位X线片进行测量分析。结果:非手术组的前颅底-关节点角(NSAr)、ODI、下中切牙-下颌平面角(L1/MP)大于手术组,面角(FH/NP)、下颌平面-腭平面角(MP/PP)、关节点-下颌角点-颏下点(ArGoGn)及B-Pg小于手术组,差别均有统计学意义(均P<0.01)。NSAr、Y、Co-Go、B-Pg、ODI是判别能否进行手术治疗的决定因子。判别方程为Y赞=-4.66NSAr+0.201Y+0.637Co-Go+1.012B-Pg+0.599ODI。B-Pg与MP/SN、MP/FH、MP/PP、L1/MP、ODI、ArGoGn密切相关。结论:对下颌颏部形态的评估可为成人安氏Ⅲ类错治疗方法的选择提供参考依据。Objective：To study the correlation between chin protrusion index and the surgical indications in class Ⅲ adult patients.Methods：A total of 61 class Ⅲ adult patients were collected.Thirty-nine patients were treated by orthodontic appliance only（Non-surgical group）,and twenty-two patients were treated with orthodontic and orthognathic surgery（Operated group）.The cephalometric analysis was made in the two groups before treatment.Results：There was a significant large anterior skull base-a key point angle（NSAr）,overbite depth indicator（ODI）and under the central incisors-mandibular plane angle（L1/MP） in Non-surgical group than Operated group（P〈 0.01）,but significantly smaller Frankfort horizontal plane and the Facial plane（FH /NP）,mandibular plane to palatal plane（MP/PP）,key points-the mandibular angle point-the submental point（ArGoGn） and B-Pg in Non-surgical group than Operated group（P〈 0.01）.The five measurements,NSAr,Y,Co-Go,B-Pg and ODI were the key factors to determine the surgical treatment.The standardized discriminant function was Y=-4.66 NSAr＋0.201 Y＋0.637 Co-Go＋1.012 B-Pg＋0.599 ODI.The results showed that the B-Pg was closely correlated with MP/SN,MP/FH,MP/PP,L1/MP,ODI and ArGoGn.Conclusion：Assessing the shape of chin can provide reference for adult Class Ⅲ malocclusion treatment.

关 键 词：错 安氏Ⅲ类 颏 上颌骨 下颌骨 正畸学 X线 

分 类 号：R783.5[医药卫生—口腔医学]