title: Influence of implant diameter in the displacement of dental implants in trabecular bovine bone under a static lateral load: experimental results and computational modeling.
abstract: OBJECTIVE
  Primary stability and micromovement of dental implants depend on structural properties of the surrounding bone and on implant dimension and design. The purpose of this study was to provide objective data for the influence of implant diameter on the displacement of titanium screw implants.
  
  
  METHODS
  Ninety Semados implants (length 15 mm, diameter 3.25, 3.75, and 4.5 mm; Bego, Bremen, Germany) were inserted in trabecular bone specimens. All implants were inserted with a torque up to 30 N·cm and loaded horizontally with 10, 20, and 30 N for 2 seconds.
  
  
  RESULTS
  All implants showed primary stability. With increasing force, a gradual increase of micromovement was observed (Kruskal-Wallis test, P = 0.000). No significant differences were found (Kruskal-Wallis test, P = 0.148) comparing different diameters for every force.
  
  
  CONCLUSIONS
  Variation of the diameter of standard implants between 3.25 and 4.5 mm does not seem to influence the primary stability in trabecular bone specimen. Differences between experimental and computational results may be due to the simplification used when modeling.
authors.affiliation: *Associate Professor, Department of Maxillofacial Surgery, Georg-August-University Hospital, Gottingen, Germany. †Adjunct Professor, Department of Bioengineering, Faculty of Engineering, Universidad Nacional de Entre Rios, Argentina; Director, Dental Service, General Hospital Diamante, Diamante, Entre Rios, Argentina. ‡Research Assistant, Department of Bioengineering, Faculty of Engineering, Universidad Nacional de Entre Rios, Oro Verde, Entre Ríos, Argentina. §Research Assistant, Department of Bioengineering, Faculty of Engineering, Universidad Nacional de Entre Rios, Sanatorio Adventista del Plata, Libertador San Martín, Entre Ríos, Argentina. ‖Head of the Diagnostic Image Department, Sanatorio Adventista del Plata, Entre Rios, Argentina.
authors.forename: Wilfried
authors.initials: W
authors.lastname: Engelke
authors.forename: Oscar A
authors.initials: OA
authors.lastname: Decco
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Cura
authors.forename: Isai
authors.initials: I
authors.lastname: Maldonado
authors.forename: Federico G
authors.initials: FG
authors.lastname: Crippa
mesh_terms: D000818:Animals; D001863:Bone Screws; D002417:Cattle; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis / Q000379:methods*; D066298:In Vitro Techniques; D013314:Stress, Mechanical; D014025:Titanium; D019415:Torque
chemical_list: D015921:Dental Implants; D014025:Titanium