Joint Replacement or Interpositional Arthroplasty for CMC1 Arthritis, a Prospective Trial
Joint Replacement or Interpositional Arthroplasty for CMC1 Arthritis, a Prospective Trial
Interpositional arthroplasty is by many considered to be the current gold standard for the
 treatment of thumb carpometacarpal arthritis. The results are generally good, but the
 rehabilitation time can be long and failures are difficult to treat. Total joint replacements
 now exist with modern uncemented designs that can be an alternative treatment. Short term
 studies show that thumb function often is better and rehabilitation time shorter, however
 there is uncertainty with regards to the longevity of the implants. Currently no prospective
 randomized trials have compared these two treatment options. Our hypothesis is that the total
 joint replacement will give the same results or better when compared to the interpositional
 arthroplasty.
Eligible: patients >18 years with pain and dysfunction from the first cmc joint. Clinical and
 radiological arthritis.

 Exclusion: degenerative changes in the STT joint (all patients are assessed by CT), other
 injuries in the hand/thumb, pregnancy

 Outcome measures: quick-Dash, Nelson hospital score, range of motion, grip strength

 Complications are registered.

 The patients are observed for two years and the investigators aim to include a total of 40
 patients.
Inclusion Criteria:

 -  CMC 1 arthritis

 -  Pain and dysfunction

 -  Adult patients

 -  General good health

 Exclusion Criteria:

 -  Pregnancy

 -  STT arthritis (CT scan preoperatively for all patients)

 -  Other injuries in thumb/hand