正常（牙合）成年人硬腭部骨质厚度初探  

Evaluation of palatal bone thickness in adults with normal occlusion for orthodontic miniscrews placement

作　　者：赵弘[2] 顾晓明[2] 刘洪臣[1,2] 王照五[1] 寻春雷[3] 

机构地区：[1]解放军总医院口腔医学研究所,北京100853 [2]武警总医院口腔医学中心,北京100039 [3]北京大学口腔医学院·口腔医院正畸科

出　　处：《中华口腔医学杂志》2011年第3期177-181,共5页Chinese Journal of Stomatology

摘　　要：目的 测量正常（牙合）成年人硬腭部骨质厚度,以期为腭部支抗种植体的安全植入提供基础数据.方法 选择32名正常（牙合）、无正畸治疗史的成年人（男性16人,女性16人）,年龄（30.1±6.5）岁.拍摄锥体束CT（cone beam computerized tomography,CBCT）,以经过切牙孔后缘的冠状线为基线,向后与（牙合）平面垂直、与基线平行、在正中矢状线上每隔3 mm对硬腭部进行重建,选取7个与（牙合）平面垂直的冠状面,第1层为切牙孔后缘冠状面,第7层为距离切牙孔后缘18 mm的冠状面.在每个冠状面上确定位于正中矢状线上的腭中缝点为M点,左右侧硬腭水平部最外缘点为D点,均分M点与D点连线为4等份,从内到外依次命名为A、B、C点.测量各点对应处硬腭部骨质厚度.结果 硬腭部第1～7层骨质厚度的差异有统计学意义,骨质厚度从前向后逐渐递减;最厚处为12.6 mm,位于第1层冠状面D点;最薄处为2.7 mm,位于第7层冠状面B点;第2、3层冠状面骨质厚度最高为10.5 mm,最低为5.8 mm.硬腭部左右两侧骨质厚度差异均无统计学意义（P＞0.05）.结论 正常（牙合）成年人硬腭部距切牙孔后缘6 mm内可植入长度为5～10 mm的支抗种植体.Objective To investigate the palatal bone thickness in adult with normal occlusion Methods The cone beam computerized tomography records of 32 adults with normal occlusion （ 16 males and 16 females）, mean age （30. 1 ±6. 5） years, were used to measure the bone thickness at midpalatal area and the right and left palatal sides. Coronal slices at 3 mm intervals were generated. Slice 1 was the coronal slice through the posterior border to the incisive foramen, while Slice 7 was the coronal slice 18 mm away from the incisive foramen. At each coronal slice, the midpalatal sites were Site M and the sites on the exterior margin of the hard palatal were Site D. Four equally divided parts on the line linking Site M to Site D were named Site A, B, C from the interior to the exterior respectively. Palatal bone thickness were measured at these sites. Results Significant differences were noted from Slice 1 to Slice 7, the bone thickness of palate tended to decrease from the front to the back. The thickest site at hard palatal was 12. 6 mm, locating at Site D of Slice 1, while the thinnest site was 2. 7 mm, locating at Site B of Slice 7.The palatal bone thickness ranged from 10. 5 mm（maximum） to 5. 8 mm（minimum） at Slice 2 and Slice 3. No statistical significance was found between the left and right sides （ P 〉 0. 05 ）. Conclusions The favorable sites for miniscrew placement were the anterior region of the hard palate in adult. The length of miniscrew ranged from 5 mm to 10 mm can be placed from 6 mm posterior to the incisive foramen.

关 键 词：腭 硬 正畸支抗 骨质厚度 

分 类 号：R783.5[医药卫生—口腔医学]