High Loosening Rate of the Moje Acamo Prosthesis for Treating Osteoarthritis of the Trapeziometacarpal Joint

Abstract

The Moje Acamo carpometacarpal (CMC) implant is an uncemented large ball-and-socket joint made of a ceramic material coated with a bioactive substance (Bioverit) for osseous fixation. Nine Moje Acamo CMC prostheses were implanted into nine patients with primary osteoarthritis of the thumb CMC joint. At 12 months, three implants had been revised because of progressing pain and osteolysis. In the remaining six patients, radiographs have shown progressive osteolysis around both implants in five patients. These poor results mean that we no longer perform this operation and we recommend close follow-up of all cases that have been performed.

Fixation of trapezial implants in a trapeziometacarpal total joint prosthesis tested in a model of porcine bone

“…High aseptic loosening rates of the trapezial component have been reported in both cemented and uncemented trapezial implants [2][3][4][5][6][7]. In uncemented implants, primary fixation relies on pressfitting the bone until bony fixation occurs by ingrowth of the bone to the implant.…”

Prothèse Roseland® : étude de qualité de vie de 68 patients avec un recul moyen de 43,8 mois

“…Encore faut-il utiliser une prothèse fiable, ce qui n'est pas toujours le cas [8]. D'autres échecs surviennent pendant la courbe d'apprentissage, surtout quand elle est trop longue [9].…”

Failed total carpometacarpal joint prosthesis of the thumb: Results after resection arthroplasty

“…In three patients, the implant was an uncemented MOJE Ò ceramic prosthesis [16], which was revised because of aseptic loosening of both components in all three. In the revised MOJE Ò implants, two of the patients were treated without total resection of the trapezium because of the large metacarpal bone loss after removal of the implant but without a tendon interposition arthroplasty.…”

“…The results of trapeziectomy for treatment of osteoarthritis of the basal joint of the thumb are generally excellent, with or without interposition of a tendon [2][3][4][5][6][7], but revision of failed trapeziometacarpal arthroplasty is more unpredictable [8][9][10][11]. Total joint replacement with a prosthesis may give faster rehabilitation and better grip strength than tendon interposition arthroplasty [12], but it often fails [13][14][15][16][17]. Loosening of the implant in total joint prosthesis may be treated by resection arthroplasty, and the aim of this study was to present the results of resection arthroplasty after a carpometacarpal total joint prosthesis has failed.…”