title: Measurement of elastic modulus and Vickers hardness of surround bone implant using dynamic microindentation--parameters definition.
abstract: The clinical performance of dental implants is strongly defined by biomechanical principles. The aim of this study was to quantify the Vicker's hardness (VHN) and elastic modulus (E) surround bone to dental implant in different regions, and to discuss the parameters of dynamic microindantion test. Ten cylindrical implants with morse taper interface (Titamax CM, Neodent; 3.5 mm diameter and 7 mm a height) were inserted in rabbit tibia. The mechanical properties were analyzed using microhardness dynamic indenter with 200 mN load and 15 s penetration time. Seven continuous indentations were made distancing 0.08 mm between each other perpendicularly to the implant-bone interface towards the external surface, at the limit of low (Lp) and high implant profile (Hp). Data were analyzed by Student's t-test (a=0.05) to compare the E and VHN values obtained on both regions. Mean and standard deviation of E (GPa) were: Lp. 16.6 ± 1.7, Hp. 17.0 ± 2.5 and VHN (N/mm2): Lp. 12.6 ± 40.8, Hp. 120.1 ± 43.7. No statistical difference was found between bone mechanical properties of high and low profile of the surround bone to implant, demonstrating that the bone characterization homogeneously is pertinent. Dynamic microindantion method proved to be highly useful in the characterization of the individual peri-implant bone tissue.
authors.affiliation: UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Priscilla Barbosa Ferreira
authors.initials: PB
authors.lastname: Soares
authors.affiliation: Department of Oral and Maxillofacial Surgery and Implantology, UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Sarah Arantes
authors.initials: SA
authors.lastname: Nunes
authors.affiliation: Department of Mechanical Engineering, UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Sinésio Domingues
authors.initials: SD
authors.lastname: Franco
authors.affiliation: Department of Mechanical Engineering, UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Raphael Rezende
authors.initials: RR
authors.lastname: Pires
authors.affiliation: Department of Mechanical Engineering, UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Darceny
authors.initials: D
authors.lastname: Zanetta-Barbosa
authors.affiliation: Department of Operative Dentistry and Dental Materials, UFU - Federal University of Uberlandia, Uberlândia, MG, Brazil.
authors.forename: Carlos José
authors.initials: CJ
authors.lastname: Soares
mesh_terms: D000465:Algorithms; D000818:Animals; D001696:Biomechanical Phenomena; D000069343:Bone-Implant Interface / Q000033:anatomy & histology / Q000502:physiology*; D015921:Dental Implants; D003799:Dental Stress Analysis / Q000295:instrumentation; D055119:Elastic Modulus; D006244:Hardness; D008422:Materials Testing; D011817:Rabbits; D013499:Surface Properties; D013977:Tibia / Q000033:anatomy & histology / Q000502:physiology / Q000601:surgery
chemical_list: D015921:Dental Implants