title: Pyrocarbon interposition (PyroDisk) implant for trapeziometacarpal osteoarthritis: minimum 5-year follow-up.
abstract: OBJECTIVE
  To report outcomes after a minimum of 5 years following pyrocarbon interposition (PyroDisk) trapeziometacarpal joint implant for osteoarthritis at a single center.
  
  
  METHODS
  We retrospectively reviewed the midterm clinical and radiological outcomes of 19 patients who had a pyrocarbon interposition implant (PyroDisk; Integra Life Sciences, Plainsboro, NJ) arthroplasty. The rate and causes of repeat surgeries, revisions, and complications were examined.
  
  
  RESULTS
  The mean follow-up period was 68 months. Patient satisfaction was high. The mobility of the operated thumb was restored to a range of motion comparable with that of the contralateral thumb. Grip strength improved by 26%. Overall function, according to the Quick Disabilities of the Arm, Shoulder, and Hand score, showed an average improvement of 71 to 20. Pain decreased by 78% according to the numerical rating scale. Radiological evaluation using a modification of the system described by Herren revealed progression of the periprosthetic lucency (grade I-II) of the implant after 5 years in 5 of 19 (26%) patients. Progression of lucency did not predict implant loosening or failure at 5 years. Two patients had symptomatic instability that required revision. No dislocations occurred. The 5-year survival of the prosthesis was 90%.
  
  
  CONCLUSIONS
  The PyroDisk implant for treating advanced trapeziometacarpal arthritis did not demonstrate superiority over published outcome data of trapeziectomy with or without ligament reconstruction and tendon interposition.
  
  
  METHODS
  Therapeutic IV.
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain. Electronic address: Dr.barreraochoa@gmail.com.
authors.forename: Sergi
authors.initials: S
authors.lastname: Barrera-Ochoa
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: Nuria
authors.initials: N
authors.lastname: Vidal-Tarrason
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Correa-Vázquez
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: Maria Mercè
authors.initials: MM
authors.lastname: Reverte-Vinaixa
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Font-Segura
authors.affiliation: Hand Surgery and Microsurgery Unit, ICATME-University Hospital Dexeus-Quirón, Barcelona, Spain; Orthopaedic Surgery and Traumatology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
authors.forename: Xavier
authors.initials: X
authors.lastname: Mir-Bullo
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement / Q000295:instrumentation*; D001672:Biocompatible Materials; D002244:Carbon; D052737:Carpometacarpal Joints; D005260:Female; D005500:Follow-Up Studies; D018737:Hand Strength; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012189:Retrospective Studies; D013933:Thumb; D013997:Time Factors; D051222:Trapezium Bone; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; C009139:pyrolytic carbon; D002244:Carbon
keywords: PyroDisk implant; pyrolytic carbon; trapeziometacarpal arthritis; trapeziometacarpal arthroplasty