CAJ | 학술논문

目的研究成人骨性Ⅲ类错(牙合)患者下切牙区牙槽骨形态特征.方法对17例成人骨性Ⅲ类错(牙合)患者及10例正常(牙合)对照者进行锥体束计算机断层(Cone beam computed tomography,CBCT)技术扫描拍摄,并对相关数据进行测量分析.结果 ①骨性Ⅲ类错(牙合)下切牙区牙槽骨厚度较正常(牙合)者薄(3.3±0.6) mm,其根尖点距唇侧骨皮质距离较近(0.8±0.4)mm(P＜0.01);②骨性Ⅲ类错(牙合)牙槽骨附着高度较正常(牙合)者低,尤其是唇侧牙槽附着高度较低(5.2±1.3) mm(P＜0.01);③下切牙倾斜度与牙槽骨厚度、唇侧牙槽附着高度、根尖点距唇侧牙槽骨距离具有相关性.结论骨性Ⅲ类错(牙合)患者的下切牙区牙槽骨厚度较薄,唇侧牙槽骨附着高度较低并且与下切牙唇倾度有一定的相关性.临床中应重视成人骨性Ⅲ类错(牙合)患者的牙槽骨形态对于下切牙移动的影响.
목적 연구성인골성Ⅲ류착(아합)환자하절아구아조골형태특정.방법 대17례성인골성Ⅲ류착(아합)환자급10례정상(아합)대조자진행추체속계산궤단층(Cone beam computed tomography,CBCT)기술소묘박섭,병대상관수거진행측량분석.결과 ①골성Ⅲ류착(아합)하절아구아조골후도교정상(아합)자박(3.3±0.6) mm,기근첨점거진측골피질거리교근(0.8±0.4)mm(P＜0.01);②골성Ⅲ류착(아합)아조골부착고도교정상(아합)자저,우기시진측아조부착고도교저(5.2±1.3) mm(P＜0.01);③하절아경사도여아조골후도、진측아조부착고도、근첨점거진측아조골거리구유상관성.결론 골성Ⅲ류착(아합)환자적하절아구아조골후도교박,진측아조골부착고도교저병차여하절아진경도유일정적상관성.림상중응중시성인골성Ⅲ류착(아합)환자적아조골형태대우하절아이동적영향.
Objective To study the morphology of alveolar bone around the mandibular incisors in adult patients with skeletal Class Ⅲ malocclusion.Methods The sample consisted of 17 patients with skeletal Class Ⅲ malocclusion and 10 normal occlusion subjects.TheCBCT images covering the region ofmandibular incisors were obtained and the data were measured and analyzed.Results ① Alveolar bone thickness(LA+LP3.3±0.6 mm) were thinner than normal groups.Root apex was closer to labial cortical bone than lingual (0.8±0.4 mm)(P＜0.01); ② The vertical alveolar bone level,especially at the labial side (LAH5.2 ± 1.3 mm) were significantly reduced than normal group (P＜0.01); ③ There were statistically correlations between the mandibular incisors inclination and the alveolar bone thickness,the alveolar bone level at the labial side,the distance between apex to labial bone.Conclusions In skeletal Class Ⅲ malocclusion adults,the alveolar bone thickness was thinner and the vertical alveolar level at the labial side was lower than normal occlusion ones.They were all correlated with the inclination of lower incisors.Alveolar bone morphology should be considered during lower incisor movements.