title: [Results of the treatment of basal thumb osteoarthritis by Rubis II prosthesis after more than 5 years. A retrospective study of 118 cases].
abstract: OBJECTIVE
  The goal of the work was to evaluate the mid-term results of the Rubis II® trapeziometacarpal prosthesis for the treatment of basal thumb osteoarthritis.
  
  
  METHODS
  From 1997 to 2003, 118 trapeziometacarpal prostheses Rubis II® were implanted at Saint-Quentin's Hospital. Seventy-seven have been clinically and radiologically reviewed. The average follow-up was of 88 months. Sixteen patients were reviewed by phone. Fourteen patients were lost to contact and two died (13.5% of cases). Nine prostheses were removed (7.6% of cases).
  
  
  RESULTS
  Among the reviewed prostheses, 76.6% of patients had no pain, the others had moderate pain. Postoperatively, the average opposition according to Kapandji's scale was 9.52. The average key-pinch force was similar on both sides. All reviewed patients were satisfied or very satisfied. No radiological loosening was noted. Nine removals were necessary; for post-traumatic dislocation in six cases, post-traumatic fracture of the trapezium in two cases, and inflammatory reaction with no infection in one case. The survival rate of the prosthesis was 93% at five years.
  
  
  CONCLUSIONS
  The Rubis II® prosthesis presents a satisfactory survival rate after five years and good clinical results. The design of the implant could explain the absence of loosening. The main risk of the Rubis II prosthesis seems to be the post-traumatic dislocation occurring mostly during the first two years after surgery.
authors.affiliation: Service de chirurgie orthopédique et traumatologique, CHU d'Amiens, place Victor-Pauchet, Amiens cedex 1, France. cmaesclavier@gmail.com
authors.forename: C
authors.initials: C
authors.lastname: Maes
authors.forename: J-L
authors.initials: JL
authors.lastname: Dunaud
authors.forename: M
authors.initials: M
authors.lastname: Moughabghab
authors.forename: S
authors.initials: S
authors.lastname: Benaissa
authors.forename: L
authors.initials: L
authors.lastname: Henry
authors.forename: F
authors.initials: F
authors.lastname: Guériat
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008662:Metacarpophalangeal Joint / Q000601:surgery*; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery*; D019736:Prostheses and Implants; D011474:Prosthesis Design; D012189:Retrospective Studies; D013933:Thumb; D013997:Time Factors