title: Influence of implant drill materials on wear, deformation, and roughness after repeated drilling and sterilization.
abstract: OBJECTIVE
  The aim of this study was to evaluate deformation, roughness, and mass loss of stainless steel, diamond-like carbon (DLC)-coated and zirconia drills after multiple osteotomies with sterilization procedures.
  
  
  METHODS
  Drilling procedures were performed using stainless steel (G1), DLC-coated (G2), and zirconia (G3) drills. All groups were divided in subgroups 1, 2, 3, 4, and 5, corresponded to drills used 0, 10, 20, 30, and 40 times, respectively.
  
  
  RESULTS
  No significant differences in mass and roughness were detected among all groups and subgroups. In SEM images, all groups revealed signs of wear while coating delamination was detected in G2. Drills from G1 displayed more irregular surface, whereas cutting edges were more regular in G3.
  
  
  CONCLUSIONS
  Zirconia drills presented more regular surfaces whereas stainless steel drills revealed more severe signs of wear. Further studies must be performed to evaluate the putative influence of these findings in heat generation.
authors.affiliation: *Former Masters Degree Student of Latin American Institute of Dental Research and Education (ILAPEO), Curitiba, Brazil. †Professor, Latin American Institute of Dental Research and Education (ILAPEO), Curitiba, Brazil. ‡Phd Student, Oral and Maxillofacial Department, São Paulo State University, Araçatuba, Brazil. §Professor, Latin American Institute of Dental Research and Education (ILAPEO), Curitiba, Brazil.
authors.forename: Gabriel Cury
authors.initials: GC
authors.lastname: Batista Mendes
authors.forename: Luis Eduardo Marques
authors.initials: LE
authors.lastname: Padovan
authors.forename: Paulo Domingos
authors.initials: PD
authors.lastname: Ribeiro-Júnior
authors.forename: Elisa Mattias
authors.initials: EM
authors.lastname: Sartori
authors.forename: Laiz
authors.initials: L
authors.lastname: Valgas
authors.forename: Marcela
authors.initials: M
authors.lastname: Claudino
mesh_terms: D000818:Animals; D002417:Cattle; D003757:Dental Implantation / Q000379:methods; D003762:Dental Instruments / Q000009:adverse effects; D018130:Diamond; D006801:Humans; D010027:Osteotomy / Q000379:methods*; D012272:Ribs / Q000601:surgery; D013242:Sterilization; D015040:Zirconium
chemical_list: D018130:Diamond; D015040:Zirconium; C028541:zirconium oxide