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.
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