Which of the following represents a safe cantilever force threshold for implants?

The safe cantilever force threshold for implants is typically considered to be around 60% of the load-bearing capacity of the implant. This percentage is based on biomechanical studies which suggest that loads applied to implants should ideally remain within this threshold to ensure the longevity and stability of both the implant and the surrounding bone structure.

When forces exceed this limit, the risk of complications such as implant failure or bone resorption increases significantly. Therefore, a threshold of 60% emphasizes a conservative approach to loading, which is particularly important for long-term success in implant dentistry. This threshold takes into account factors such as bone quality, implant design, and the specific conditions of the implantation site.

The other values represent loads that could potentially exceed safe limits for most implant-supported restorations. A threshold of 100% might put undue stress on the implant, risking damage over time, while higher percentages like 120% or 140% would greatly increase the likelihood of failure by overloading the implant and jeopardizing the surrounding structures.