Arthritis implant uses contact lens material

Doctors have replaced damaged cartilage with an implant made out of contact lens material for a few patients with arthritis.
nbcnews.com

Cartiva

* Daniels TR, Younger SE, Penner MJ, et al. Foot Ankle Int. 2017;38(3):243-247. Limited to five year data from a subset of study participants (N=27). Additional data from other sites and subjects not yet available.
cartiva.net

Knee cartilage replacement therapy

Articular cartilage, most notably that which is found in the knee joint, is generally characterized by very low friction, high wear resistance, and poor regenerative qualities. It is responsible for much of the compressive resistance and load bearing qualities of the knee joint and, without it, walk…
en.wikipedia.org