The biologic era of joint repair is evolving so rapidly that removing injured tissues may soon be a surgical procedure of the past. Repairing, regenerating, and replacing tissues with natural tissues as opposed to artificial materials, is the path keeping biologics firmly ahead of bionics in orthopedics.
There is every reason to believe that surgery is especially prone to placebo effects. The more dramatic the procedure, the more likely it raises hope of cure. "Quick, operate before the patient gets better" is one of those jokes that orthopedic surgeons tell among themselves, barely covering a hard truth: that a lot of elective surgery might be unnecessary or even harmful.