CAJ | 학술논문

目的：比较2种位置的微种植钉支抗推磨牙向远中的临床效果。方法：选择安氏Ⅱ类错25例，男7例，女18例，年龄15～29岁，平均22．58岁，牙列轻中度拥挤，面型较好，无明显前突。实验组（n ＝12）于颊侧第一磨牙近中颊根上方颧牙槽嵴处植入微螺钉种植体；对照组（n ＝13）于上颌第一磨牙与第二前磨牙牙根之间植入微螺钉种植体。推磨牙向远中，推力2．5 N。通过临床评价和对比2组矫治前后的头颅侧位定位片评价其治疗效果差异。结果：实验组和对照组微种植体首次植入成功率分别为100％（26/26）和87．5％（21/24）。治疗后上颌磨牙分别后移（2．91±0．96）mm 和（2．29±0．66）mm（P ＞0．05）。实验组磨牙压低的作用优于对照组，切牙唇倾的副作用小于对照组，切牙压入的作用优于对照组。结论：颧牙槽嵴处的微种植钉支抗推磨牙向远中移动较传统颊侧种植钉支抗对磨牙的垂直向压入及对抗切牙唇倾的效果好。
목적：비교2충위치적미충식정지항추마아향원중적림상효과。방법：선택안씨Ⅱ류착25례，남7례，녀18례，년령15～29세，평균22．58세，아렬경중도옹제，면형교호，무명현전돌。실험조（n ＝12）우협측제일마아근중협근상방권아조척처식입미라정충식체；대조조（n ＝13）우상합제일마아여제이전마아아근지간식입미라정충식체。추마아향원중，추력2．5 N。통과림상평개화대비2조교치전후적두로측위정위편평개기치료효과차이。결과：실험조화대조조미충식체수차식입성공솔분별위100％（26/26）화87．5％（21/24）。치료후상합마아분별후이（2．91±0．96）mm 화（2．29±0．66）mm（P ＞0．05）。실험조마아압저적작용우우대조조，절아진경적부작용소우대조조，절아압입적작용우우대조조。결론：권아조척처적미충식정지항추마아향원중이동교전통협측충식정지항대마아적수직향압입급대항절아진경적효과호。
Objective:To compare 2 position implant-supported molar distalization systems in clinical application.Methods:25 pa-tients with Class II and mild to moderate crowding dentition were included,18 females and 7 males,aged 15 to 29 years old(22.58 on average ).All the patients were treated with non-extraction method by distalizing the upper molar with micro-implant anchorage.In ex-perimental group(n =12)the micro-implants were inserted on infrazygomatic crest above the maxillary first molar mesial buccal root. In control group(n =13)the micro-implants were inserted on buccal alveolar bone between maxillary second premolar and maxillary first molar.In both groups micro-implants were inserted to distalize the maxillary molars.The displacement patterns of maxillary inci-sors and molars were measured and compared.Results:Successful primary micro-implant placement was obtained in 87.5%(21 /24) of the implantation in control group and 100%(26 /26)in experimental group.The distal movement(mm)of the molars in control and experiment group was 2.29 ±0.96 and 2.91 ±0.96 respectively(P >0.05).Experimental group showed significant intrusive displace-ment of the molars.Horizontal incisor displacement in experimental group was more than that in control group.Conclusion:Micro-im-plant inserted in infrazygomatic crest may facilitate intrusion and distalization of the maxillary molar and incisor.