title: Peri-Implant Strain in an In Vitro Model.
abstract: An in vitro experimental model was designed and tested to determine the influence that peri-implant strain may have on the overall crestal bone. Strain gages were attached to polymethylmethacrylate (PMMA) models containing a screw-type root form implant at sites 1 mm from the resin-implant interface. Three different types of crown superstructures (cemented, 1-screw [UCLA] and 2-screw abutment types) were tested. Loading (1 Hz, 200 N load) was performed using a MTS Mechanical Test System. The strain gage data were stored and organized in a computer for statistical treatment. Strains for all abutment types did not exceed the physiological range for modeling and remodeling of cancellous bone, 200-2500 με (microstrain). For approximately one-quarter of the trials, the strain values were less than 200 με the zone for bone atrophy. The mean microstrain obtained was 517.7 με. In conclusion, the peri-implant strain in this in vitro model did not exceed the physiologic range of bone remodeling under axial occlusal loading.
authors.affiliation: 1  Oral Implantology Research Institute, Dubai, UAE.
authors.forename: Souheil
authors.initials: S
authors.lastname: Hussaini
authors.affiliation: 2  Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ.
authors.forename: Tritala K
authors.initials: TK
authors.lastname: Vaidyanathan
authors.affiliation: 2  Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ.
authors.forename: Abhinav P
authors.initials: AP
authors.lastname: Wadkar
authors.affiliation: 3  University of Sharjah, UAE; Jordan University of Science and Technology, Irbid, Jordan.
authors.forename: Firas A Al
authors.initials: FA
authors.lastname: Quran
authors.affiliation: 2  Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ.
authors.forename: David
authors.initials: D
authors.lastname: Ehrenberg
authors.affiliation: 2  Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ.
authors.forename: Saul
authors.initials: S
authors.lastname: Weiner
mesh_terms: D000539:Alveolar Process; D001696:Biomechanical Phenomena; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D013314:Stress, Mechanical
chemical_list: D015921:Dental Implants
keywords: abutments; bone strain; dental implants; microstrain; strain gages; stress shielding