中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (21): 3356-3360.doi: 10.12307/2023.466

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

牙支持式导板设计制造误差及对种植精度的影响

徐良伟,张坤领   

  1. 宁波职业技术学院,浙江省宁波市  315800
  • 收稿日期:2022-05-18 接受日期:2022-07-27 出版日期:2023-07-28 发布日期:2022-11-24
  • 通讯作者: 徐良伟,博士,讲师,宁波职业技术学院,浙江省宁波市 315800
  • 作者简介:徐良伟,男,1989年生,浙江省台州市人,汉族,博士,讲师,主要从事口腔领域医工结合、3D打印及生物力学仿真研究。
  • 基金资助:
    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

Design and manufacturing error and implant accuracy of tooth-supported surgical template

Xu Liangwei, Zhang Kunling   

  1. Ningbo Polytechnic, Ningbo 315800, Zhejiang Province, China
  • Received:2022-05-18 Accepted:2022-07-27 Online:2023-07-28 Published:2022-11-24
  • Contact: Xu Liangwei, phD, Lecturer, Ningbo Polytechnic, Ningbo 315800, Zhejiang Province, China
  • About author:Xu Liangwei, phD, Lecturer, Ningbo Polytechnic, Ningbo 315800, Zhejiang Province, China
  • Supported by:
    Scientific Research Project of Introduction and Training of High-Level Talents of Ningbo Polytechnic, No. NZ22RC02 (to XLW)

摘要:


文题释义:

光固化快速成形技术:是一种增材制造技术,其原理是计算机控制激光束对光敏树脂为原料的表面进行逐点扫描,被扫描区域的树脂薄层产生光聚合反应而固化,形成零件的一个薄层;工作台下移一个层厚的距离,以便固化好的树脂表面再敷上一层新的液态树脂,进行下一层的扫描加工,如此反复,直到整个原型制造完毕。
种植精度:是指在同一坐标系下,种植体实际植入位置与计算机中种植方案中的设计位置之间的偏差。

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。
https://orcid.org/0000-0002-0024-1862(徐良伟)
中国组织工程研究杂志出版内容重点:生物材料;骨生物材料口腔生物材料纳米材料缓释材料材料相容性组织工程

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

Abstract: 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. 

Key words: implant template, implant accuracy, digital design and manufacture, tooth-supported implant template, template design

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