上颌前牙及前磨牙区唇(颊)侧骨厚度及嵴顶高度相关性研究

The correlation between the labial( buccal) bone thickness and alveolar crest height in maxillary anterior teeth and premolar zone

目的:测量正常青年人上颌前牙及前磨牙区唇(颊)侧牙槽骨厚度及嵴顶高度,并研究二者之间的相关性。方法:对67名汉族青年志愿者上颌前牙及前磨牙区进行CBCT扫描,测量该区域牙槽嵴顶区唇(颊)侧牙槽骨厚度及唇侧牙槽嵴顶与釉牙骨质界(CEJ)间距离,采用SPSS 17.0软件进行分析。结果:第一前磨牙颊侧嵴顶与CEJ之间距离最大(P<0.05);在CEJ根方2 mm处唇(颊)侧嵴顶高度与唇(颊)侧骨厚度呈负相关(P<0.05),0.6<|r|<0.8。结论:上颌第一前磨牙颊侧嵴顶较其他牙位高,牙槽嵴顶区唇(颊)侧骨厚度越薄,唇(颊)侧嵴顶距CEJ越远,种植美学风险越大。

Objective： To investigate the labial（buccal） bone thickness at alveolar crest zone and alveolar crest height of the maxil- lary anterior teeth and premolars of young adults with normal occlusion. Methods： The alveolar bone of the anterior teeth and premo- lars of 67 eligible Han national young volunteers was scanned by CBCT. Then the facial bone thickness and the distance between the facial alveolar crest and Cemento-enamel Junction（CEJ） of the anterior teeth and premolars were measured and analyzed after recon- struction. Results： The distance between labial （buccal） crest and labial （buccal） CEJ of the maxillary first premolars was the lar- gest（ P 〈0.05 ） ; there was a negative correlation between the labial（buccal） crest height and the facial alveolar bone thickness at 2 mm from CEJ toward root derection [ （ P 〈 0.05 ）, 0.6 〈 ｜ r ｜ 〈 0. 8 ]. Conclusion ： The labial （buccal） crest of the first premolars was higher than that of other teeth in maxillary aesthetic zone. At alveolar crest zone, when the labial （buccal） bone was thinner, the dis- tance between labial （buccal） crest and labial （buccal） CEJ was larger, and the implant aesthetic risk is higher.