*Master of Sciences in Implant Dentistry, Instituto Latino Americano de Pesquisa e Ensino Odontológico (ILAPEO), Curitiba, PR, Brazil; Private Practice, Technical Manager, Clínica Top Odontologia, Ponta Grossa, PR, Brazil. †Doctor of Sciences in Orthodontics, Universidade Estadual Paulista (UNESP), Araraquara, SP, Brazil; Coordinator, Master's Program in Orthodontics; Professor, Department of Orthodontics, ILAPEO, Curitiba, PR, Brazil. ‡Doctor of Sciences in Orthodontics, Universidade de São Paulo (USP), São Paulo, SP, Brazil; Professor, Graduate Programs in Orthodontics and Implant Dentistry, Department of Orthodontics, ILAPEO, Curitiba, PR, Brazil. §Professor, Master of Sciences in Production and Systems Engineering, Department of Mechatronics, Control and Automation, Pontifícia Universidade Católica do Paraná (PUCPR); Instructor, Sociedade Ensino Técnico (Ensitec), Curitiba, PR, Brazil. ¶Doctor of Dental Surgery, Research Center São Leopoldo Mandic Dental; R&D Director, ILAPEO, Curitiba, PR, Brazil; Chief Scientific Officer, Neodent Osseointegrated Implants, Curitiba, PR, Brazil. ‖Analyst, Department of Research, Development, and Innovation, Neodent Osseointegrated Implants, Curitiba, PR, Brazil.
Implant Dent. 2017 Oct;26(5):723-729. doi: 10.1097/ID.0000000000000645.
This study evaluated cutting efficiency (CE) and linear wear of dental implant drills after 450 standardized osteotomies on bovine ribs. Diamond-like carbon-coated steel drills (SG), acid-treated steel drills (EG), and ceramic drills (ZG) were divided into 6 subgroups according to the number of uses.
A robot-controlled program performed systematic instrumentation, timing, axial loading, and managed feed rate. CE was recorded in a polyurethane resin blank and end wear (VBBmax) was analyzed under stereo microscopy.
After osteotomies in beef ribs, CE for the Ø2.0-mm drill decreased 10.2% in SG and 10.9% in ZG; for the Ø3.0-mm drill, CE decreased 30.6% in SG, 8.5% in ZG, and improved in EG. The greatest wear occurred in Ø2.0-mm drills; ZG drills (Ø3.0 mm) exhibited only edge frittering, as confirmed on scanning electron microscopy.
After 50 exposures to mechanical loads, steel and ceramic drills lost CE. Whereas cutting and thermal performance improved in experimental drills, the Ø2.0-mm drill exhibited the most signs of wear proportional to use. These findings suggest that, with the methodology employed, the life of these drills exceeds 50 osteotomies.
本研究评估了在牛肋骨上进行 450 次标准化截骨后，牙科种植体钻头的切割效率（CE）和线性磨损。类金刚石碳涂层钢钻头（SG）、酸处理钢钻头（EG）和陶瓷钻头（ZG）根据使用次数分为 6 组。
机器人控制程序执行系统仪器、计时、轴向加载和管理进给速度。CE 在聚氨酯树脂空白中记录，端磨损（VBBmax）在立体显微镜下分析。
在牛肋骨截骨后，SG 的 Ø2.0mm 钻头的 CE 降低了 10.2%，ZG 的 CE 降低了 10.9%；对于 Ø3.0mm 钻头，SG 的 CE 降低了 30.6%，ZG 的 CE 降低了 8.5%，EG 的 CE 提高了。最大的磨损发生在 Ø2.0mm 钻头中；扫描电子显微镜证实，ZG 钻头（Ø3.0mm）仅出现边缘碎裂。
在经受 50 次机械负载后，钢和陶瓷钻头的 CE 降低。虽然实验钻头的切削和热性能有所提高，但 Ø2.0mm 钻头的磨损迹象最明显，与使用成正比。这些发现表明，采用所使用的方法，这些钻头的寿命超过 50 次截骨。
