Mestrinho Lisa A, Gordo Inês, Gawor Jerzy, Leal Nuno, Niza Maria
CIISA-Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal.
Pride Veterinary Centre, Derby, United Kingdom.
Front Vet Sci. 2019 Apr 5;6:97. doi: 10.3389/fvets.2019.00097. eCollection 2019.
Computer-aided design (CAD) and computer-aided manufacturing (CAM) technology is routinely used in various fields of human dentistry, particularly prosthodontics. Reverse engineering and additive manufacturing allow the technician to create an easier, faster and more accurate restoration, with a natural design and adequate strength. Eighteen titanium alloy full crowns were produced for canine teeth of 7 working dogs using CAD/CAM technology (3D BioCare, Nobel Biocare). Reasons for crown therapy included abrasion, enamel infraction, and crown fracture. Crown preparation was routinely performed, and impressions were delivered to the laboratory where digital impressions were performed with a lab scanner. Using 3D dental design software, the metal crown was designed and sent for manufacture. Each prosthodontic crown was then carved from a solid titanium alloy block to obtain the final crown. All prosthodontic crowns were an adequate fit, and cementation was routinely performed. Crowns were lost from 2 canine teeth during the dogs' normal working activity, in one case, for 2 times. In all cases, replicas were requested. In the first case, the second cementation was successful. In the second case, the second crown was again lost and only the third cementation was successful. Follow up of all cases range from 12 to 62 months. Mean survival time for the crowns was 58.0 months. Here, CAD/CAM technology is shown to be a useful tool for manufacturing accurate prosthodontic crowns for veterinary patients. Moreover, CAD/CAM enables the production of prosthodontic crown replicas in a very short time and at relatively low cost compared to traditional methods, consequently eliminating the need for at least one anesthetic procedure in the incidence of crown cementation failure.
计算机辅助设计（CAD）和计算机辅助制造（CAM）技术在人类牙科的各个领域，尤其是在口腔修复学中经常使用。逆向工程和增材制造使技术人员能够创建更简便、快速且更精确的修复体，其设计自然且强度足够。使用CAD/CAM技术（3D BioCare，诺贝尔生物公司）为7只工作犬的犬齿制作了18个钛合金全冠。进行冠修复治疗的原因包括磨损、牙釉质折断和冠折。常规进行牙冠预备，制取印模后送至实验室，使用实验室扫描仪进行数字化印模。使用3D牙科设计软件设计金属冠并送去制造。然后从实心钛合金块上雕刻出每个口腔修复冠以获得最终的牙冠。所有口腔修复冠都贴合良好，并常规进行粘固。在犬的正常工作活动期间，有2颗犬齿的牙冠脱落，其中1例脱落了2次。在所有情况下，都需要制作复制牙冠。在第一例中，第二次粘固成功。在第二例中，第二个牙冠再次脱落，只有第三次粘固成功。所有病例的随访时间为12至62个月。牙冠的平均存活时间为58.0个月。在此，CAD/CAM技术被证明是为兽医患者制造精确口腔修复冠的有用工具。此外，与传统方法相比，CAD/CAM能够在极短的时间内以相对较低的成本生产口腔修复冠复制品，从而在牙冠粘固失败的情况下至少消除了一次麻醉程序的需要。
