摘要
背景:种植导板能有效将术前设计的种植体位置转移到患者口内颌骨中,使种植体避开神经线、上颌窦等重要解剖结构,有效降低手术风险,因此导板种植手术精准度就显得尤为重要。目的:评估带有特定定位曲面的牙支持式种植导板设计制造误差,以及其对种植精度的影响。方法:选择一位缺牙患者拍摄锥形束CT并制取石膏模型,结合患者口内情况,进行种植方案设计,确定牙支持式导板定位曲面,并生成种植导板。采用光固化快速成形技术加工制造10个导板,并进行三维激光扫描,将扫描获取的导板三维数据与设计导板的三维数据匹配后,进行设计制造误差分析。另外,将制造得到的10个导板佩戴到患者石膏模型上,模拟静态导板引导下的种植体位置,将模拟获得的种植体位置与设计方案中的初始种植体位置匹配进行误差分析。结果与结论:①导板制造的正向偏差均值为0.093 mm,负向偏差均值为0.092 mm,标准偏差值均值为0.169 mm;②模拟种植精度实验结果显示,种植体12的颈部中心偏差为(1.172±0.283)mm,顶端中心偏差为(1.339±0.283)mm,中心轴线角度偏差为(0.365±0.228)°;种植体21的颈部中心偏差为(1.274±0.379)mm,顶端中心偏差为(1.461±0.404)mm,中心轴线角度偏差为(0.643±0.276)°;③结果显示,带有特定定位曲面的牙支持式导板的设计制造误差对种植精度有显著影响。
BACKGROUND:The implant template can effectively transfer the implant designed position to the patient’s jaw.It helps implant avoid important anatomical structures such as nerve and maxillary sinus,and effectively reduces the risk of surgery.Therefore,the accuracy of implant template surgery is particularly important.OBJECTIVE:To assess the design and manufacturing error of the tooth-supported surgical template and its implant accuracy in the fully positioned state.METHODS:A patient with missing teeth underwent a cone beam CT and a plaster model was established.According to the patien’s oral situation,implant plan with special positioning surface tooth-supported template was designed and implant template was made.Stereo Lithography Apparatus rapid prototyping technology was used to fabricate 10 templates and three-dimensional laser scanning was performed.After matching the scanning data with designed template model data,manufacturing error analysis was carried out.In addition,the 10 manufactured templates were worn on the patient’s plaster model to simulate implant position,and the simulated implant positions were matched with initial implant positions in the design plan for accuracy analysis.RESULTS AND CONCLUSION:(1)The mean positive deviation of the template was 0.093 mm;the mean negative deviation was 0.092 mm,and the mean standard deviation was 0.169 mm.(2)The simulated implant accuracy results showed that the neck center deviation of implant 12 was(1.172±0.283)mm;the top center deviation was(1.339±0.283)mm;the central axis angle deviation was(0.365±0.228)°;the neck center deviation of implant 21 was(1.274±0.379)mm;the top center deviation was(1.461±0.404)mm,and the center axis angle deviation was(0.643±0.276)°.(3)These results indicate that the design and manufacturing error of tooth-supported template with a specific positioning surface has a significant impact on implant accuracy.
作者
徐良伟
张坤领
Xu Liangwei;Zhang Kunling(Ningbo Polytechnic,Ningbo 315800,Zhejiang Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2023年第21期3356-3360,共5页
Chinese Journal of Tissue Engineering Research
基金
宁波职业技术学院高层次人才引进培养科研项目《基于SLA的氧化锆桩核生物力学及制备方法研究》(NZ22RC02),项目负责人:徐良伟。
关键词
种植导板
模拟种植精度
数字化设计与制造
牙支持式种植导板
导板设计
implant template
implant accuracy
digital design and manufacture
tooth-supported implant template
template design
