Is the Chin Not As Strong with an Implant in Place?

After a few months when scar tissue has formed a capsule over the implant it is nearly as strong as before

Depending on what your surgeon likes to use, chin implants can be flexible (silicone) or solid with characteristics similar to plastic. None of these are particularly brittle. The flexible ones can withstand a lot of blunt trauma (your skin will get damaged long before the implant will). In the case of the more rigid implants, I would think that any force strong enough to crack the implant would probably cause a jaw fracture as well. It is possible to have a chin augmentation... more

This really depends on the makeup of the implant. Implants can be fabricated from silicone gel, PTFE, Porous polyethylene, woven polypropylene mesh, hydroxyapatite, bone, etc. Depending on the composition of the implant it is possible that it can fracture or break. However, the vast majority of implants will not break and are quite durable. Discuss your implant concerns with your surgeon and make sure you are well aware of the brand, size, shape and composition.