中国实用口腔科杂志

中国实用口腔科杂志 ›› 2011, Vol. 4 ›› Issue (09): 554-556.

• 论著 • 上一篇    下一篇

上颌前牙区颌骨微种植支抗钉植入安全区的研究

  

  1. 大连市口腔医院 a放射线科，b正畸科，辽宁  大连 116021
  • 收稿日期:2011-07-14 修回日期:2011-08-25 出版日期:2011-09-15 发布日期:2011-12-06

  • Received:2011-07-14 Revised:2011-08-25 Online:2011-09-15 Published:2011-12-06

摘要：

目的    对上颌前牙区颌骨的骨量及唇侧骨皮质厚度进行测量分析，为正畸治疗植入微种植支抗钉的安全区提供参考依据。方法    对2010年9月至2011年6月来大连市口腔医院就诊的25例成人患者行锥形束CT扫描及三维重建，测量距上颌牙槽嵴顶3、6、9、12 mm 4个水平上颌中切牙、侧切牙、尖牙根间区近远中向、唇腭向的距离以及唇侧骨皮质厚度。结果    （1）在距上颌牙槽嵴顶3、6、9 mm水平中切牙根间近远中向距离均最宽，唇侧骨皮质均最薄；（2）在距牙槽嵴顶9 mm水平中切牙与侧切牙根间近远中向距离最窄；（3）在4个测量水平侧切牙与尖牙根间唇侧骨皮质均最厚；（4） 唇腭向在距牙槽嵴顶9 mm及以上水平，中切牙根间骨厚度最薄，中切牙与侧切牙根间骨厚度最厚。 25例中仅3例前牙区各牙根长度超过12 mm，在距牙槽嵴顶12 mm水平能测出根间近远中向距离，均较宽。结论    通过对扫描后颌骨影像的分析，明确了前牙区颌骨的骨量及唇侧骨皮质厚度，为植入微种植支抗钉的安全区提供参考依据。

关键词: 锥形束CT, 微种植支抗钉, 上颌前牙区, 安全区

Abstract:

Objective    To investigate the bone depth and buccal cortical bone thickness of maxillary anterior region to aid in choosing suitable buccal placement sites for orthodontic micro-implant anchorage. Methods    Twenty-five adults were scanned and reconstructed with cone beam CT， the mesio-distal distance interdental and buccal-lingual bone depth and buccal cortical bone thickness were measured at 3， 6， 9 and 12mm from the alveolar crest between upper anterior roots. Results    （1） The mesio-distal distance between central incisors was widest in all the measurement levels， while the buccal cortical bone thickness was thinnest； （2） At the 9mm-level， the shortest mesio-distal distance was between the roots of central and lateral incisors； （3） The buccal cortical bone thickness between lateral incisors and canines was thickest in all the measurment levels； （4） At/above the 9mm-level， the buccal-lingual bone depth was thinnest between central incisors， and thickest between central and lateral incisors. It was seen in only 3 cases that the roots length exceeded 12mm. Conclusions    The interdental area between lateral incisors and canines provides adequate buccal cortical bone thickness， and 9mm-level or even higher is necessary for safe inter-roots micro-implant anchorage placement.

Key words: cone beam CT；micro-implant anchorage；maxillary anterior region；safe zones