CAJ | 학술논문

目的：评价应用不同垂直高度的微型种植支抗钉在回收上前牙时，对上前牙垂直高度的影响。方法：在应用种植支抗钉的患者中选取种植支抗钉头部距弓丝8~10 mm的20例患者为高位牵引组，选取种植支抗钉头部距弓丝4~6 mm的20例患者为低位牵引组。分别记录两组回收上前牙治疗前后上中切牙切端及根尖的垂直高度变化。结果：高位牵引组的上前牙在治疗前后切牙切端及根尖的垂直高度改变无统计学意义（ P ﹥0．05）。低位牵引组的上前牙在治疗前后切牙切端及根尖的垂直高度改变有统计学意义（ P ﹤0．05）。结论：高位牵引组可使上前牙在回收后不发生牙合向伸长，低位牵引组可使上前牙在回收后发生牙合向伸长。
목적：평개응용불동수직고도적미형충식지항정재회수상전아시，대상전아수직고도적영향。방법：재응용충식지항정적환자중선취충식지항정두부거궁사8~10 mm적20례환자위고위견인조，선취충식지항정두부거궁사4~6 mm적20례환자위저위견인조。분별기록량조회수상전아치료전후상중절아절단급근첨적수직고도변화。결과：고위견인조적상전아재치료전후절아절단급근첨적수직고도개변무통계학의의（ P ﹥0．05）。저위견인조적상전아재치료전후절아절단급근첨적수직고도개변유통계학의의（ P ﹤0．05）。결론：고위견인조가사상전아재회수후불발생아합향신장，저위견인조가사상전아재회수후발생아합향신장。
[ABSTRACT]Objective:To evaluate the influence of different vertical height of Micro-Implant to vertical height of maxillary anterior teeth on moving maxillary anterior teeth backward. Methods:20 cases were selected from patients with the application of micro-implant as the high traction group with head of micro-implant from arch wire 8 ~ 10 mm,and another 20 cases were selected from patients with the application of micro-implant as the low traction group with head of micro-implant from arch wire 4 ~ 6 mm. The height change of incisal margin in maxillary central incisor before and after treatment in two groups were recorded respectively. Results:There were no statistically significant difference in the obvi-ous change of vertical height on maxillary anterior teeth before and after therapy in high traction group(P ﹥ 0. 05). There was statistically significant difference in the significant changes of vertical height on maxillary anterior teeth before and after therapy in low traction group(P ﹤ 0. 05). Conclusion:Elongation will not occur in high traction group after maxillary anteriorteeth-retraction while in low traction group it will take place.