title: Avanta versus Swanson silicone implants in the MCP joint--a prospective, randomized comparison of 30 patients followed for 2 years.
abstract: The results of Swanson and Avanta metacarpophalangeal joint arthroplasties in rheumatoid patients were compared in a prospective, randomized study of 30 patients (120 implants). At 2-year follow-up, grip strength was measured, hand function was assessed with the Sollerman test and the subjective outcome was determined with visual analogue scores. With both implants ulnar deviation and flexion deformities decreased, and there was no difference between the groups. The increase in range of motion was 7 degrees greater with Avanta implants than with Swanson implants. Grip strength and hand function were unaltered but the visual analogue scales showed decreased pain levels and subjective improvements in hand function, grip strength and cosmesis. Twenty-four of 30 patients were satisfied. Fracture of the silicone spacer occurred with 12 Avanta (20%) and eight Swanson implants (13%), with a higher fracture frequency in men.
authors.affiliation: Department of Hand Surgery, Sahlgrenska University Hospital/Sahlgrenska, Göteborg, Sweden. karin.moller@lundbysjukhus.se
authors.forename: K
authors.initials: K
authors.lastname: Möller
authors.forename: C
authors.initials: C
authors.lastname: Sollerman
authors.forename: M
authors.initials: M
authors.lastname: Geijer
authors.forename: P
authors.initials: P
authors.lastname: Kopylov
authors.forename: M
authors.initials: M
authors.lastname: Tägil
mesh_terms: D000328:Adult; D000368:Aged; D015535:Arthritis, Psoriatic / Q000503:physiopathology / Q000601:surgery; D001172:Arthritis, Rheumatoid / Q000503:physiopathology / Q000601:surgery*; D019643:Arthroplasty, Replacement / Q000295:instrumentation*; D001672:Biocompatible Materials / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D018737:Hand Strength; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008662:Metacarpophalangeal Joint / Q000601:surgery*; D008875:Middle Aged; D011446:Prospective Studies; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012828:Silicones / Q000627:therapeutic use; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D012828:Silicones