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RESEARCH PRODUCT
Fracture resistance after implantoplasty in three implant-abutment connection designs
Eduard Valmaseda-castellónRui FigueiredoCosme Gay-escodaJavier Mir-mariOctavi Camps-fontAlbert González-barnadassubject
Dental Stress AnalysisTitanium implantMaterials scienceCirurgia dentalchemistry.chemical_elementDental Abutments03 medical and health sciences0302 clinical medicineFlexural strengthDental AbutmentsMaterials TestingGeneral DentistryEndosseous dental implantsDental ImplantsTitaniumOrthodonticsCrownsResearchConnection (principal bundle)030206 dentistry:CIENCIAS MÉDICAS [UNESCO]OtorhinolaryngologychemistryDental surgeryUNESCO::CIENCIAS MÉDICASFracture (geology)SurgeryImplants dentals intraossisImplantImplantologyImplant abutmentTitaniumdescription
Background To assess the effect of implantoplasty and implant-abutment design on the fracture resistance and macroscopic morphology of narrow-diameter (3.5 mm) dental implants. Material and Methods Screw-shaped titanium dental implants (n = 48) were studied in vitro. Three groups (n = 16) were established, based on implant-abutment connection type: external hexagon, internal hexagon and conical. Eight implants from each group were subjected to an implantoplasty procedure; the remaining 8 implants served as controls. Implant wall thickness was recorded. All samples were subjected to a static strength test. Results The mean wall thickness reductions varied between 106.46 and 153.75 µm. The mean fracture strengths for the control and test groups were, respectively, 1211.90±89.95 N and 873.11±92.37 N in the external hexagon implants; 918.41±97.19 N and 661.29±58.03 N in the internal hexagon implants; and 1058.67±114.05 N and 747.32±90.05 N in the conical connection implants. Implant wall thickness and fracture resistance (P < 0.001) showed a positive correlation. Fracture strength was influenced by both implantoplasty (P < 0.001) and connection type (P < 0.001). Conclusions Implantoplasty in diameter-reduced implants decreases implant wall thickness and fracture resistance, and varies depending on the implant-abutment connection. Internal hexagon and conical connection implants seem to be more prone to fracture after implantoplasty. Key words:Dental implants, narrow diameter, implant connection, peri-implantitis, implantoplasty, fracture strength.
year | journal | country | edition | language |
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2020-01-01 |