摘要： 目的·比较上颌骨前牙区的种植体在使用不同角度的基台修复后牙槽骨改变情况的影像学差异。方法·选择2017年1月—2018年12月在上海市黄浦区第二牙病防治所接受上颌前牙区种植修复的患者40例，按修复基台角度不同分为2组，每组20例，分别使用0°和25°基台修复。在安装角度基台后的即刻、6个月、12个月、18个月时行锥形束CT（cone beam computed tomography， CBCT）检查，测量2组角度基台在各时期的唇侧牙槽骨厚度和高度的CBCT变化差值，并通过自身对照研究和配对
t检验比较组间差异。结果·0°和25°基台组在修复后6个月、12个月和18个月时的CBCT比较显示，2组种植体唇侧牙槽骨厚度和高度的变化差异均无统计学意义。结论·采用CBCT影像检查可以量化分析种植体周围牙槽骨的变化。影像学研究显示上颌前牙区种植修复时选择的基台角度在25°以内时，基台角度对牙槽骨的改变没有显著性影响。
关键词: 锥形束CT, 种植体, 角度基台, 牙槽骨 Abstract: Objective·To compare the imaging differences of alveolar bone changes after using different angles of abutment implants in the maxillary anterior area.
Methods·Forty patients of maxillary anterior area implant restoration at the Second Stomatological Disease Institution of Huangpu District in Shanghai from January 2017 to December 2018 were divided into 2 groups according to the different angle of abutment, with 20 cases in each group, which were treated with the 0° and 25° abutment, respectively. Cone beam computed tomography (CBCT) examination was performed immediately, 6 months, 12 months and 18 months after angular abutment restoration, and the differences of CBCT changes in the thickness and height of labial alveolar bone between the two groups at different periods was measured by self-control study and paired t test.
Results·CBCT comparison of 0° and 25° groups at 6 months, 12 months and 18 months after restoration showed no significant difference in the thickness and height of alveolar bone in the two groups.
Conclusion·Change of alveolar bone around the implant can be quantified by using CBCT image examination. When the base angle of the maxillary anterior tooth area is within 25°, the base angle has no significant effect on the change of alveolar bone.
Key words: cone beam computed tomography (CBCT), implant, angle abutment, alveolar bone PDF全文下载地址:
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