Development of the training system for the tooth preparation using a personal computer

使用个人计算机开发牙体预备培训系统

• 批准号: 08557111
• 负责人: MIYAZAKI Takashi
• 金额: $ 5.89万
• 依托单位: Showa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08557111/
• 关键词: CAD; CAM; Accuracy; Computer Graphics; Numerical analysis

Recently CAD/CAM technology has been introduced in a dental field to be expected to reduce the dental laboratory procedure. This technology included not only the technical aspect where wax-up and casting is just replaced to computer assisted technology but also the environmental aspect to eliminate intermediate material such as impression material, stone, wax and investment. In addition, we expected to control the quality of prostheses by aiding computer. Furthermore, we aimed to apply this technology to education especially in the field of tooth preparation. We already developed the original CAD/CAM system to fabricate ceramic crowns automatically on stone models. In this study digitizing accuracy in the develop system was evaluated. The model for the simple standardized abutment was prepared and digitized by a laser digitizer in the CAD/CAM machine. Digitized data was compared with those digitized by three dimensional precision touching probe digitizer (UAA-CAA 850, Karl Zeiss). The … More sectioned surface of the abutment digitized by the laser displacemeter in the machine indicated the data scattering was observed on the diagram that was affected by the secondary reflection and several noise. Maximum scattering was (]SY.+-。[)600mum. Four receptors were composed for one laser beam in the laser digitizer to compare and select the suitable data. However, the result suggested we need to improve ccuracy of digitizing. We developed the modified CAD/CAM machine where the supporting parts for digitizing and machining were different to eliminate useless overhang. Noise during digitizing reduced drastically in the new machine because of the improvement of the light axis of the displacemeter and filter properties and the prevention of random reflection even if only 2 PSD sensors were fixed in the new machine. We also develop the software to express the digitized abutment on the monitor where students could understand the difference between their prepared abutment and the master model. We concluded the developed CAD/CAM device was expecting in the field of education in the future. Less

最近，CAD/CAM 技术已被引入牙科领域，有望减少牙科实验室程序。该技术不仅包括将蜡型和铸造技术替换为计算机辅助技术的技术方面，还包括消除环境方面的问题。此外，我们还希望通过计算机辅助控制修复体的质量，特别是在牙齿预备领域。用于制造陶瓷牙冠的原创 CAD/CAM 系统在这项研究中，我们对开发系统中的数字化精度进行了评估，并通过 CAD/CAM 机器中的激光数字化仪对数字化数据进行了比较。接触式探针数字化仪（UAA-CAA 850，Karl Zeiss）由机器中的激光位移计数字化的基台截面表面表明在图表上观察到数据散射。受到二次反射和几种噪声的影响，最大散射为(]SY.+-。 [)600mum。在激光数字化仪中为一束激光组成了四个接收器来比较和选择合适的数据，但结果表明我们需要提高数字化的精度，其中支持部件。数字化和加工不同，无用消除悬垂 由于位移计的光轴和滤波器特性的改进以及即使只有 2 个随机反射的防止，数字化过程中的噪声也显着降低。 PSD 已固定在新机器中，我们还开发了在监视器上表达数字化基台的软件，学生的传感器可以了解他们准备的基台和主模型之间的差异，我们得出的结论是开发的 CAD/CAM 设备在现场是值得期待的。以后的教育就少了。

项目成果

Hotta, Yasuhiro: "Automatic Fabrication of Ceramic Crowns Using a Newly Developed Dental CAD/CAM System" Abstract. 97- (1997)

Hotta, Yasuhiro：“使用新开发的牙科 CAD/CAM 系统自动制造陶瓷牙冠”摘要。

Hotta, Yasuhiro: "Automatic Fabrication of Ceramic Crowns Using a CAD/CAM System" The sixth International Academy of Dental Computing. Abstract. 60- (1997)

Hotta, Yasuhiro：“使用 CAD/CAM 系统自动制造陶瓷牙冠”第六届国际牙科计算学会。

小林幸隆: "コンピュータ支援による補綴物の自動製作に関する研究(第5報)レーザ倣いによる精度の検討" 歯科材料・器械. 15(S28). 58-59 (1996)

Yukitaka Kobayashi：“计算机辅助自动制造假体的研究（第 5 次报告）激光追踪精度检查”《牙科材料和仪器》15（S28）。

Hotta,Yasuhiro: "Automatic Fabrication of Ceramic Crowns a CAD/CAM System." The sixth International Academy of Dental Computing. Abstract. 60 (1997)

Hotta,Yasuhiro：“利用 CAD/CAM 系统自动制造陶瓷牙冠。”

堀田康弘: "試作CAD/CAM装置で製作したセラミック製クラウンの適合精度" 昭和歯学会雑誌. 16(3). 230-234 (1996)

Yasuhiro Hotta：“使用原型 CAD/CAM 设备制造的陶瓷牙冠的安装精度”昭和牙科学会杂志 16(3) (1996)。