Artificial ligaments have been used as augmentation devices, scaffolds
, ingrowth ligaments and even prostheses. The augmentation devices rel
y entirely on the autologous tissue for their function, whereas each o
f the other types functions more or less as a prosthesis. These device
s can function only for a limited time and they are very sensitive to
the implantation technique. Problems involve debris formation, synovit
is and finally ligament rupture. There is also a loss of stability in
the treated knee over the first 2-3 postoperative years. The clinical
results obtained in various studies with the prosthetic devices are no
t satisfactory. The problem of reconstruction of a knee with ligamento
us instability is far greater than that involved in replacing the liga
ment only.