A multi-component thumb joint assembly incorporated into reconditioned end surfaces established between upper metacarpal and opposing lower proximal phalanx bones. A first component is anchored into a reconditioned end surface of the metacarpal bone and exhibits a first exposed support surface. A second component is anchored into a reconditioned end surface of the proximal phalanx and exhibits a second exposed support surface. An intermediate and spherical shaped component is supported in at least one of eccentric or rotational fashion between the first and second anchored components.
