At what percentage does cantilever force begin to exceed safe limits on implants?

Cantilever forces on dental implants create significant biomechanical challenges, as they can lead to complications like implant failure or bone loss if they exceed safe thresholds. Research indicates that cantilever forces typically exceed safe limits when they reach around 140% of the load-bearing capacity of the implant.

This threshold is critical because as the cantilever length increases or the forces applied become greater, the risk of mechanical failure, including bending or fracturing of the implant, escalates. A percentage around 140% suggests that while implants can handle normal occlusal forces effectively, additional cantilever loading must be carefully managed to prevent overstressing the underlying bone and the implant fixture itself.

Understanding these thresholds is essential for dental professionals to ensure long-term success in implant-supported restorations, reinforcing the importance of design considerations in cases where cantilevers are employed.