The effect of platform switching on the levels of metal ion release from different implant–abutment couples

Abstract

A potential link has been established between bone response and metal corrosion near dental implants. Platform switching, in which smaller diameter restorative components, or abutments, are positioned on large implant platforms, minimizes loss in the bone that supports the tooth—a requirement for successful implantation. However, mechanisms governing this positive peri-implant bone response remain unclear. Haralampos Petridis and coworkers from University College London, UK, investigated the role of corrosion by-products near implants by evaluating metal ion release from platform-switched and matched (matching abutment and implant platform diameters) systems immersed in lactic acid. Active corrosion mainly occurred on the outer edges of the implant–abutment interface for all systems, causing metal ion discharge at their vicinity. Platform-matched systems produced the highest amounts of metal ions, suggesting that platform switching limits bone loss by reducing this discharge.

Keywords

corrosion / dental implants / ion release / peri-implant bone loss / platform-switching / titanium

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