Morphology analysis of alveolar bone of maxillary central incisor in patients of Angle class Ⅱ division 2 with short root anomaly disease
Objective To investigate the alveolar bone three-dimensional morphological feature of maxillary central incisors in pa-tients of Angle class Ⅱ division 2 with short root anomaly disease(SRA),in order to provide references for orthodontic treatment and risk control.Method 112 patients of Angle class Ⅱ division 2 were selected and divided into study group(n=56,SRA)and control group(n=56,normal root).CBCT were used to measure alveolar bone thickness,height,fenestration and dehiscence in maxillary central incisors respectively.Statistical analysis was used by SPSS 26.0 software package after measurement.Results The study group's thick-ness of labial alveolar bone at middle and apex of root were thinner than those of the control group;The study group's thickness of total alveolar bone at apex of root was thinner than that of the control group,there were significant statistical differences(P<0.05).The study group's height of labial alveolar bone was larger than that of the control group,there were significant statistical differences(P<0.05).The study group's rate of thickness of labial alveolar bone at apex of root<1 mm was higher than that of the control group.The study group's rate of thickness of labial alveolar bone at middle and apex of root>2 mm was lower than those of the control group,there were significant statistical differences(P<0.05).The study group's rate of fenestration and dehiscence were higher than those of the control group,there were significant statistical differences(P<0.05).Conclusion In order to formulate individual tooth movement plan,the characteristics of thin alveolar bone,low attachment height and high rate of bone defects in maxillary central incisors should be considered in the treatment of Angle class Ⅱ division 2 with SRA.
Angle class Ⅱ division 2Short root anomaly disease(SRA)Maxillary central incisorAlveolar bone morphologyBone defect
万方数据
维普
