口内扫描与CBCT评估种植体位置的体外精度研究

doi:10.13701/j.cnki.kqyxyj.2025.07.009

摘要/Abstract

摘要： 目的: 通过体外实验分析口内扫描与锥形束计算机断层扫描(cone beam computed tomography,CBCT)评估种植体位置的一致性,探讨口内扫描替代CBCT的可行性。方法: 根据缺失牙位置和种植体数量构建10种牙列缺损树脂模型,术后分别进行口内扫描(每组4次)和CBCT扫描(每组1次),利用逆向工程软件测量颈部、尖端、深度及角度偏差,分析正确度(n=4)与精密度(n=6)。结果: 正确度结果显示,颈部偏差(0.174±0.080) mm,尖端偏差(0.310±0.098) mm,深度偏差(0.131±0.077) mm,角度偏差(1.311±0.486)°;除深度偏差外(P>0.05),其余偏差随种植体数量增加显著增大(P<0.05)。精密度结果显示,游离端组偏差显著高于非游离端组(P<0.05)。结论: 利用口内扫描评估种植体位置可能是评估手术规划精度,避免术后CBCT扫描的有效替代方案,但需进一步临床验证。

关键词: 口腔种植, 口内扫描, 锥形束计算机断层扫描, 精度

Abstract: Objective: To analyze the consistency between intraoral scanning (IOS) and cone-beam computed tomography (CBCT) in evaluating implant positioning through in vitro experiments and to explore the feasibility of replacing CBCT with IOS. Methods: Ten resin models simulating dentition defects were constructed based on missing tooth positions and implant numbers. Postoperative scans were performed using IOS (4 scans per group) and CBCT (1 scan per group). Deviations at the implant neck, apex, depth, and angulation were measured using reverse engineering software, followed by analysis of trueness (n=4) and precision (n=6). Results: Trueness results revealed neck deviation of (0.174±0.080) mm, apex deviation of (0.310±0.098) mm, depth deviation of (0.131±0.077) mm, and angular deviation of (1.311±0.486)°. Except for depth deviation (P>0.05), all other deviations significantly increased with the number of implants (P<0.05). Precision analysis demonstrated significantly higher deviations in the free-end group compared to the non-free-end group (P<0.05). Conclusion: Intraoral scanning may serve as a viable alternative to CBCT for assessing implant positioning accuracy in surgical planning and avoiding postoperative radiation exposure, however, further clinical validation is warranted.

Key words: oral implant, intraoral scanning, CBCT, accuracy

林宇轩, 张思慧, 陈江. 口内扫描与CBCT评估种植体位置的体外精度研究[J]. 口腔医学研究, 2025, 41(7): 594-600.

LIN Yuxuan, ZHANG Sihui, CHEN Jiang. In Vitro Accuracy Study of Intraoral Scanning versus CBCT in Evaluating Implant Positioning[J]. Journal of Oral Science Research, 2025, 41(7): 594-600.

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