【摘要】 目的:研究上颌埋伏中切牙患儿的弯根情况并采用Logistics回归分析探究其危险因素。方法:回顾性分析135例上颌埋伏中切牙患儿临床资料,统计埋伏牙弯根发生情况,分析患儿年龄、埋伏牙切端至硬腭平面的距离(切距)、牙冠角度、牙冠宽度、埋伏牙根长等因素,选择可能的危险因素进行Logistic回归分析。结果:135例上颌中切牙埋伏患儿,发生弯根者87例(64.45%),分析埋伏中切牙弯根组和非弯根组临床资料显示,两组埋伏牙牙冠高度和牙冠角度差异有统计学意义(P<0.01)。经Logistic回归分析显示,上颌埋伏中切牙患儿弯根的危险因素为埋伏牙牙冠角度(P<0.01),而埋伏牙切距为非危险因素(P>0.05)。结论:弯根是上颌埋伏中切牙患儿常见的牙根发育畸形,其常见危险因素为牙冠角度,因而埋伏角度大,需早期进行外科助萌下的正畸牵引。更多还原

【Abstract】 Objective:To evaluate the dilacerated root condition of children with impacted maxillary central incisor and to explore its risk factors by logistic regression analysis.Methods:The clinical data of 135 children with impacted maxillary central incisors were retrospectively analyzed.The incidence of dilacerated root was analyzed.To analysis the age of the children,the distance from the maxillary incisal edge to the hard palate plane(MP),crown angle,crown width,root length of impacted tooth.Logistic regression analysis was performed by selecting possible risk factors.Results:Eighty-seven patients(64.45%)having dilacerated roots were found in 135 patients with impact maxillary central incisor.The clinical data of the dilacerated root group and the non-dilacerated root group showed that the difference of the MP and the crown angle were statistically significant(P<0.01).Logistic regression analysis showed that the risk factor of the dilacerated root of the impacted maxillary incisor was the crown angle(P<0.01),while the MP was a non-risk factor(P>0.05).Conclusion:Dilacerated root is a common root deformity in children with impacted maxillary incisors.The common risk factor is crown angle.Therefore,children with large angles need early orthodontic traction under surgical assisted eruption.更多还原