Influence of articular geometry on prosthetic wrist stability.
Ellipsoid and toroid-shaped articulations for total wrist prostheses were evaluated using computer modeling and laboratory experiments. An ellipsoidal design was found to accommodate greater width of the concave proximal component, resulting in better capture and prosthetic stability than a toroid shape. An ellipsoid articulation also provides greater contact area through the available arc of motion. An ellipsoidal articulation is a reasonable design for total wrist arthroplasty.
Grosland
N M
NM
Department of Orthopaedic Surgery, The University of Iowa, Iowa City, IA 52242, USA. nicole-grosland@uiowa.edu
Rogge
R D
RD
Adams
B D
BD
D003198:Computer Simulation; D019544:Equipment Failure Analysis; D020342:Finite Element Analysis; D006801:Humans; D007593:Joint Instability / Q000517:prevention & control; D007595:Joint Prosthesis; D008954:Models, Biological; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology*; D014955:Wrist Joint / Q000473:pathology / Q000503:physiopathology*