title: Model-based roentgen stereophotogrammetric analysis of the surface replacement trapeziometacarpal total joint arthroplasty.
abstract: The primary aim of this clinical and radiostereometric study was to study the migration pattern of the surface replacement trapeziometacarpal joint prosthesis (SRTMTMC, Avanta®, San Diego, CA). The secondary aims were to assess patient-related outcomes and prosthesis survival 5 years after surgery. Ten patients received the prosthesis. Radiostereometric radiographs were obtained 6 weeks, 6 months, 1 year and 5 years post-operatively and were analysed using model-based software. All patients completed DASH and Nelson Hospital scores at these follow-ups. Mean translations varied between 0.0 and 0.5 mm after 5 years. Rotation values could be calculated in six patients and mean rotations varied between -0.3 and 2.3°, although the precision of rotation values seems to be poor. The 5-year survival rate was 80%. Mean pre-operative DASH and Nelson Hospital scores were 53 (SD 14) and 51 (SD 13), respectively. Six months post-operatively, the DASH and Nelson Hospital scores had both significantly improved to 25 (SD 20) and 74 (SD 18) and remained high after 5 years. Implant stability was good 5 years post-operatively, and early migration did not predict implant failure in this study.
  
  
  METHODS
  IV.
authors: 1 Department of Orthopaedic Surgery, Reinier de Graaf Groep, Delft, The Netherlands.
authors: B
authors: B
authors: Ten Brinke
authors: 1 Department of Orthopaedic Surgery, Reinier de Graaf Groep, Delft, The Netherlands.
authors: N M C
authors: NM
authors: Mathijssen
authors: 2 Department of Radiology, Reinier de Graaf Groep, Delft, The Netherlands.
authors: I
authors: I
authors: Blom
authors: 3 Department of Orthopaedic Surgery, Haga Ziekenhuis, Den Haag, The Netherlands.
authors: R L M
authors: RL
authors: Deijkers
authors: 4 Centre for Orthopaedic Surgery, OCON, Hand and Wrist unit, Hengelo, The Netherlands.
authors: E M
authors: EM
authors: Ooms
authors: 1 Department of Orthopaedic Surgery, Reinier de Graaf Groep, Delft, The Netherlands.
authors: G A
authors: GA
authors: Kraan
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement; D050824:Carpal Joints; D015331:Cohort Studies; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D008953:Models, Anatomic; D010003:Osteoarthritis / Q000601:surgery*; D011475:Prosthesis Failure; D059869:Radiostereometric Analysis; D013499:Surface Properties; D013997:Time Factors
keywords: Roentgen stereophotogrammetric analysis; migration; prosthesis survival; total joint arthroplasty; trapeziometacarpal joint