CBCT技术研究前牙区骨劈开术种植修复的骨吸收特点

Dental Cone Beam Computed Tomography Analyses of Resorption of Labial Bone in Maxillary Anterior Implant by Bone Splitting Technique

目的：采用CBCT技术分析骨劈开手术后种植体唇侧骨板垂直骨吸收特点及与水平向厚度的关系。方法：选取19例上前牙种植患者,共26个种植牙位,牙槽嵴宽度均在3~5mm之间,采用骨劈开手术联合引导骨组织再生术（GBR）种植Ankylos种植体,患者种植修复完成时和2年后复诊时均拍摄锥形束CT,观察唇侧骨板吸收特点,并根据统计学分析唇侧垂直骨吸收与牙龈退缩的相关性,及与骨板水平向厚度的相关性。结果：种植体唇侧骨板垂直骨吸收与牙龈的退缩有明显的相关性,与唇侧骨板颈部水平向厚度也有相关性。结论：种植治疗时骨劈开技术能够有效增宽牙槽嵴宽度,种植体颈部唇侧骨板水平向厚度是唇侧骨板垂直骨吸收与牙龈退缩的一个重要影响因素。

Objective：To evaluate the vertical bone resorption of labial bone in anterior maxillary implant by bone splitting technique.Methods：19patients（8men,11women）whose ages ranged from 22 to 65years,were included in this study.The labial-lingual thickness of alveolar was from 3.0to 5.0mm for everybody,26 Ankylos implants（3.5mm）were placed after splitting the bone immediately and constructed with the operation of guided bone regeneration,CBCT were taken after crown setted immediately and two years later to observe the labial bone resorption.The value of the labial bone resorption and gingival recession were calculated and analysed and the correlation between these changes were detected in SPSS 11.0.Results：Both vertical bone resorption and gingival recession showed a significant negative correlation to cervical width.As expected,vertical bone resorption and gingival recession showed a significant positive correlation.Conclusion：It is suggested that alveolar bone thickness after implant placement in the anterior region could be negatively associated with the level of alveolar bone resorption at the labial aspect as well as gingival recession.