微种植体颌骨植入区的CBCT测量分析  

Structure analysis around mini-implants plantation area with CBCT

作　　者：李文艳[1] 彭嘉琪 林巍 余新洲[3] 尹璐[3] 侯伟[4] 刘翔[4] 林汤毅[4] 陈文静[4] 

机构地区：[1]泰州市口腔医院正畸科,江苏泰州225300 [2]澳门仁康牙科矫正中心,澳门999078 [3]南京陆军指挥学院门诊部,江苏南京210029 [4]南京医科大学口腔研究所,南京医科大学附属口腔医院正畸科,江苏南京210029

出　　处：《口腔医学》2015年第1期29-33,共5页Stomatology

基　　金：江苏省卫生厅科技项目(Z201212);江苏省自然科学基金(BK2012528)

摘　　要：目的利用锥体束CT(cone beam computed tomography,CBCT)分析上颌第二前磨牙与第一磨牙牙根间以及下颌第二磨牙近中颊根侧植入的微种植体周围组织结构。方法收集34例患者的CBCT数据。上颌测量不同植入角度的颧牙槽嵴厚度及种植体与上颌牙合平面间的距离;下颌测量不同植入高度牙槽骨各部位的最小植入角度以及颊侧骨厚度。结果 1上颌距离牙合平面13~17 mm植入微种植体,植入角度为40°~75°,上颌颧牙槽嵴厚度为(4.7±0.3)^(8.1±0.1)mm。2在下颌不同的植入点中,距离牙合平面11 mm时植入角度应大于82°,距离牙合平面16 mm时,植入角度应大于51°;距离牙合平面11 mm时第二磨牙颊侧牙槽骨厚度最小,距离牙合平面16 mm时最大。3不同植入点中,以距离牙合平面16 mm植入时至下颌神经管上缘的平均距离最小,为(9.0±1.6)mm。结纶1为保证上颌颧牙槽嵴骨厚度至少6 mm且不触及上颌窦底壁,理想的植入位置为距离上颌牙合平面13~16 mm,植入角度55°~75°。2在第二磨牙近中根颊侧植入微种植体时,建议植入点与牙合平面距离大于12 mm,植入最小角度依不同植入点而异。Objective To analyze the structure around the mini-implants between maxillary second premolar and first molar or mandibularsecond molar with Cone-beam computed tomography（ CBCT） for the clinical plantation of mini-implants. Methods A total of34 subjects were selected from patients who had undergone CBCT examinations. The distance between the simulative mini-implants and the occlusal plane and the thickness of maxillary infrazygomatic crest at different insertion angles were measured. The smallest angle and the thickness ofbuccal alveolar bone of the simulative mini-implants in different insertion heights were measured in the mandible. Results ① When the insertion angle was 40° to 75°,the thickness of the infrazygomatic crest was（ 4. 7 ± 0. 3） ^（ 8. 0 ± 0. 1） mm,13 ~17 mm from the maxillary occlusal plane. ②In different insertion cases,the insertion angle should be greater than 82°,11 mm from the mandibular occlusal plane. The buccal alveolar bone of the mandibular second molar was the thinnest. While the distance was 16 mm,the insertion angle should be greater than 51° and the buccal alveolar bone was the thickest. ③ The distance to the mandibular tube was the shortest（（ 9 ± 1. 6） mm） when the insertion site was 16 mm from the occlusal plane among different insertion sites. Conclusions① To ensure that the thickness of the infrazygomatic crest was greater than 6 mm and not touching the inferior wall of the maxillary sinus,the ideal insertion site was 13 ~ 16 mm from the maxillary occlusal planeat the angle of 55° to 75°. ② When the insertion site was buccal to the mandibular second molar,the distance of mini-inplant to the occlusal plane should be greater than 12 mm. The smallest insertion angle variedfrom the insertion sites.

关 键 词：微种植体 CBCT 颧牙槽嵴 上颌窦 下颌神经管 

分 类 号：R783.5[医药卫生—口腔医学]