摘要
背景:混合牙列期患者未萌尖牙和前磨牙近远中冠宽的预测,对于制定咬诱导诊疗计划至关重要。目的:调查乌鲁木齐汉族青少年尖牙、前磨牙的大小,建立回归方程以预测未萌尖牙前磨牙的宽度。方法:使用数显游标卡尺在石膏模型上对144名(男66名,女78名)乌鲁木齐汉族青少年正常合第二恒磨牙近中接触点之前全部牙的近远中宽度进行测量,精确到0.01mm,分析第一恒磨牙冠宽与同颌尖牙前磨牙总冠宽的相关性,并建立回归方程。结果与结论:建立预测乌鲁木齐汉族青少年未萌尖牙前磨牙大小的方程:①上颌:男性,Y=14.8382+0.7816X1(X1代表上颌第一磨牙近远中冠宽,r=0.4258,Sy.x1=0.9006);女性,Y=12.2095+1.0000X1)(r=0.4871,Sy.x1=0.9950)。②下颌:男性,Y=13.5006+0.7933X2(X2代表下颌第一磨牙近远中冠宽,r=0.4643,Sy.x2=0.8554);女性,Y=7.9223+1.2695X2(r=0.5409,Sy.x2=0.9972)。实验建立的方程更适于对乌鲁木齐汉族青少年未萌尖牙前磨牙大小的预测。
BACKGROUND：Prediction of the width between unerupted canine and premolars in mixed-dentition period plays an important role in making plans for occlusion guidance.OBJECTIVE：To develop prediction equations for estimating the width between unerupted canines and premolars of Han adolescents in Urumqi using data obtained from investigation.METHODS：Regression analyses were performed on data derived from144 Han adolescents in Urumqi（68 males and 76 females） using digital vernier caliper.Measurements were taken on plaster casts of all the teeth widths in the front of mesiocontact of the second molars and recorded to the nearest 0.01 mm.These data were analyzed to establish regression equations based on the calculating the correlation coefficients between the mesiodistal widths of the first molar in one arch and that of the canine and two premolars in the same arch.RESULTS AND CONCLUSION：The four predication equations had been developed to estimate the size of unerupted canine and premolars for Han adolescents in Urumqi.The following formulas（Y）,correlation coefficients（r） and standard deviation of Y for fixed X（Sy.x） were showed：①Maxillary arch：for males,Y=14.8382＋0.7816X1（X1 equals the mesiodistal width of the first upper molar,r=0.4258,Sy：x1=0.9006）;for females,Y =12.209 5＋1.00 0X1（r=0.487 1,Sy.x1=0.995 0）.②Mandibular arch：for males,Y=13.500 6＋0.793 3X2（X2 equals the width of the first lower molar,r=0.464 3,Sy.x2=0.855 4）;for females,Y=7.922 3＋ 1.269 5 X2（r=0.540 9,Sy.x2=0.997 2）.The newly developed equations are more applicable for predicting the mesiodistal sizes of unerupted canine and premolars of Han adolescents in Urumqi.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2010年第37期7017-7020,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
