A matrix is something that offers support to something more fragile, and in the knee it usually refers to the cartilage matrix.

Cartilage cells are unusual cells, not bound together in tissues like most cells, but living in little separate pockets, called lacunae, and supported within a firm 'jelly' which is the matrix.

Another 'matrix' that one hears about in knee surgery is the matrix that is used in a laboratory upon which cultured cartilage cells are 'seeded' to produce a cell-rich membrane that can be cut to shape to fit a hole in the cartilage of the knee to encourage cartilage regrowth there.


What is a knee meniscus?

A short animation about the knee meniscus

Dr Adrian Wilson discusses frankly his own views on ACI procedures.