摘要
Abstract
objective To explore the effects of micro-screw implant anchorage on condylar shape and symmetry in patients with posterior scissors-bite. Methods A total of 20 Class I unilateral posterior scissors-bite patients visiting our hospital from January 2013 to February 2014 were included in this study.All patients were given micro screw implant anchorage.CT imaging was used to observe the changes in condylar before and after treatment.Their normal right lateral teeth were used as controls. Results The condylar height,condylar surface area and condylar volume of 20 case patients with posterior scissors-bite were higher than that normal controls before treatments[(4.61 ± 1.09 Vs 3.52 ± 0.29)mm,(1201.32 ± 121.37 Vs 1010.23 ± 111.26)mm2,(1409.13 ± 168.24 Vs 1243.35 ± 147.08) mm3].The condylar height(3.60 ± 0.54)mm,condylar surface area(1009.15 ± 112.37)mm2 and condylar volume(1241.03 ± 137.18)mm3 were significantly lower after treatments.There was no statistically significant difference compared with normal group(P>0.05). Conclusion Early correction can effectively change the shape of the condyle and improve the degree of posterior occlusal and symmetry and is worthy of clinical use.关键词
后牙正锁牙合/微种植钉支抗/髁突形态/对称性/正畸Key words
posterior scissors-bite/micro screw implant anchorage/condylar morphology/symmetry/orthodontics分类
医药卫生
