title: Cementless total hip arthroplasty using a spongy metal surface hip prosthesis with a collarless, proximally porous-coated stem.
abstract: A collarless, proximally porous-coated type of Spongiosa Metal II hip prosthesis was used for cementless total hip arthroplasty in 52 hips, and 48 hips were followed and assessed during a mean follow-up period of 6.3 years (minimum 5 years). There were 8 hips (16.7%) that had stress shielding, and 2 hips (4.2%) that had thigh pain. In terms of stability, the stem was bony stable in 39 hips, fibrous stable in 6, and unstable in 3. The stability of the stem was significantly correlated with the stem canal filling ratio. It was suggested that the much more proximal transfer of loading stress by a collarless, proximally porous-coated stem is not suitable for the Spongiosa Metal II series because it may unacceptably reduce the stability of the stem.
authors.affiliation: Department of Orthopaedic Surgery, Gifu University, School of Medicine Gifu, Japan.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Ogawa
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Ito
authors.forename: Mansho
authors.initials: M
authors.lastname: Itokazu
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Mori
authors.forename: Nobuo
authors.initials: N
authors.lastname: Terabayashi
authors.forename: Katsuji
authors.initials: K
authors.lastname: Shimizu
mesh_terms: D000537:Aluminum Oxide; D001172:Arthritis, Rheumatoid / Q000601:surgery*; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D001696:Biomechanical Phenomena; D001848:Bone Diseases, Developmental / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000601:surgery*; D010146:Pain / Q000209:etiology; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000537:Aluminum Oxide