Reduction of Tribocorrosion Products When Using the Platform-Switching Concept

Area of Science:

• Biomaterials Science
• Dental Implantology
• Tribology

Background:

• Reduced marginal bone loss is observed with platform-switching dental implants.
• This may be linked to decreased tribocorrosion product release into peri-implant tissues.

Purpose of the Study:

• To compare tribocorrosion product release between platform-matched and platform-switched implant-abutment couplings.
• To evaluate the influence of different abutment materials (titanium, gold alloy, cobalt-chrome, zirconia) on ion release under cyclic loading.

Main Methods:

• Forty-eight titanium implants were coupled with various abutments, creating platform-switched and platform-matched groups.
• Specimens underwent cyclic loading in an acidic environment, followed by static immersion.
• Metal ion release was quantified using ICP-MS, and surfaces were analyzed via SEM with EDS.

Main Results:

• All platform-switched groups exhibited significantly less metal ion release than their platform-matched counterparts.
• Cobalt-chrome platform-matched abutments showed the highest ion release (218 ppb); platform-switched titanium abutments showed the least (11 ppb).
• Titanium was released from all groups, with highest release from platform-matched gold abutments (108 ppb). SEM revealed pitting and fretting scars.

Conclusions:

• The platform-switching concept effectively reduces tribocorrosion product release from dental implants.
• This reduction in ion release and surface damage may mitigate adverse tissue reactions and peri-implant bone loss.