Comparative Analysis of Cutting Efficiency and Surface Maintenance Between Different Types of Implant Drills: An In Vitro Study

作者：Hochscheidt Celso Joao^*; Shimizu Roberto Hideo; Andrighetto Augusto Ricardo; Pierezan Rodrigo; Thome Geninho; Salatti Rafael

来源：Implant Dentistry, 2017, 26(5): 723-729.

DOI：10.1097/ID.0000000000000645

• osteotomy
• performance testing
• dental implants
• tribology

Introduction: 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.
Materials and Methods: 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.
Results: After osteotomies in beef ribs, CE for the phi 2.0-mm drill decreased 10.2% in SG and 10.9% in ZG; for the phi 3.0-mm drill, CE decreased 30.6% in SG, 8.5% in ZG, and improved in EG. The greatest wear occurred in O2.0-mm drills; ZG drills (phi 3.0 mm) exhibited only edge frittering, as confirmed on scanning electron microscopy.
Conclusion: After 50 exposures to mechanical loads, steel and ceramic drills lost CE. Whereas cutting and thermal performance improved in experimental drills, the phi 2.0-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.

• 出版日期2017-10
• 单位Univ Estadual Paulista