CAJ | 학술논문

目的通过测量中国成人正常颌骨微螺钉种植体植入的不同位点处皮质骨厚度,为临床植入部位的选择提供参考,以提高正畸支抗的成功率.材料和方法采用螺旋CT对30例18～40岁正常颌中国成人颅颌面进行扫描并重建,测量适合微螺钉种植体植入处的皮质骨厚度,并进行统计分析.结果 48个测量项目中,均值从1.73 mm至10.67 mm不等,最小值仅0.8 mm.除前鼻嵴和下颌11牙尖隙外,46个左右对称的测最项目(左右各23个)中,34处左右对应指标相互比较均无差异(P＞0.05),另有12处测量位点左右配对检验有统计学差异(P＜0.05).结论本实验提供了微螺钉种植体支抗常见植入位点处皮质骨厚度参考值范围的数据库.下颌前牙根尖间隙,植入微螺钉种植体时应更加小心;上下颌磨牙牙尖隙处,植入相对安全.不同成人的皮质骨厚度筹异较大,提示临床工作者最好能先根据病员的CT片测出相应植入位点处皮质骨厚度,再确定微螺钉种植体的植入部位与方向.
목적 통과측량중국성인정상합골미라정충식체식입적불동위점처피질골후도,위림상식입부위적선택제공삼고,이제고정기지항적성공솔.재료화방법채용라선CT대30례18～40세정상합중국성인로합면진행소묘병중건,측량괄합미라정충식체식입처적피질골후도,병진행통계분석.결과 48개측량항목중,균치종1.73 mm지10.67 mm불등,최소치부0.8 mm.제전비척화하합11아첨극외,46개좌우대칭적측최항목(좌우각23개)중,34처좌우대응지표상호비교균무차이(P＞0.05),령유12처측량위점좌우배대검험유통계학차이(P＜0.05).결론 본실험제공료미라정충식체지항상견식입위점처피질골후도삼고치범위적수거고.하합전아근첨간극,식입미라정충식체시응경가소심;상하합마아아첨극처,식입상대안전.불동성인적피질골후도주이교대,제시림상공작자최호능선근거병원적CT편측출상응식입위점처피질골후도,재학정미라정충식체적식입부위여방향.
Objective To determine the thickness of bone cortex in upper and lower jaws where miniscrews implant was inserted.Methods Thirty chinese adults(18～40 year-old)were examined with spire CT,and three-dimensionalimages were produced.The thickness of bone cortex in upper and lower jaws was measured.The data were analyzed statistically.Results Fourty-eight measurements were from 1.73 mm to 10.67 mm on average,and the thinnest postion was 0.8 mm.34 measurements were found no significant differences on both sides and 12 measurements with significant differences between right and left side.Conclusions Implantation must be cautious for thin cortex near the center incisor apex.Because the big differences of cortex thickness existed individually,CT examination was helpful in determining the location and direction of miniscrew implants insertion.