### | Assemblage of MOM Wear Evidence | THA | RA |
1 | Hip subluxation in functional standing and sitting postures | yes | yes |
2 | Wear patterns defining in-vivo component positions | yes | yes |
3 | Notching mechanism in femoral necks | yes | - |
4 | Pits, microgrooves and plastically-deformed gouges | yes | yes |
5 | Cup positions defining femoral-neck impingements | yes | yes |
6 | Evidence of metal debris circulating in the hip joint | yes | yes |
7 | Demonstrating spino-pelvic/hip motions at impingement | yes | yes |
8 | Discussion of MOM wear mechanisms |