Norwegian Distal Ulna Resection - Replacement Study

Last updated: April 5, 2024
Sponsor: Ostfold Hospital Trust
Overall Status: Active - Recruiting

Phase

N/A

Condition

Osteoarthritis

Treatment

Prosthesis

Darrach

Clinical Study ID

NCT04074863
OstfoldHT
  • Ages 30-75
  • All Genders

Study Summary

Osteoarthritis of the joint between the forearm bones at the wrist (distal radioulnar joint, DRUJ) is a common sequel of fracture and ligament injuries or degenerative disease of the wrist. Intact DRUJ is important for normal load transfer from the hand to the forearm. DRUJ osteoarthritis leads to pain and decreased lifting capacity and rotation of the forearm. The standard treatment is resection of the ulnar head, known as the Darrach procedure. After the resection there is no longer contact in the affected joint, however, some patients can experience instability or impingement between the forearm bones. With ulnar head implant replacement may the load transfer and the stability between the forearm bones less affected. Studies with good long term results are published with both resection and replacement. However, these methods were never compared and thus it is not clear, which of the methods gives the best clinical result and less complications.

The aim of this study is to compare Darrach procedure with ulnar head replacement in a prospective randomized multicenter study. Several hand surgical centers form Norway would participate this study.

Individuals seeking treatment for their stable but painful DRUJ joints will be included and randomized to either Darrach procedure or ulnar head implant. Participants will be followed up to 5 years. Range of motion and grip strength measures and functional scores would be registered before operation, after 3 months, 1 and 5 years. Eventual complications and reoperations would be also registered.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • painful osteoarthritis distal radioulnar joint
  • stable DRUJ

Exclusion

Exclusion Criteria:

  • activ inflammatory disease with significant destruction of the joint
  • "low demand" persons
  • significant instability i DRUJ
  • active infections, poor soft tissue conditions
  • accidental wound on the operated hand
  • general contraindications for surgery

Study Design

Total Participants: 40
Treatment Group(s): 2
Primary Treatment: Prosthesis
Phase:
Study Start date:
September 16, 2020
Estimated Completion Date:
December 31, 2029

Study Description

Osteoarthritis of the joint between the forearm bones at the wrist (distal radioulnar joint, DRUJ) is a common sequel of fracture and ligament injuries or degenerative disease of the wrist. Intact DRUJ is important for normal load transfer from the hand to the forearm. DRUJ osteoarthritis leads to pain and decreased lifting capacity and rotation of the forearm. The standard treatment is resection of the ulnar head, known as the Darrach procedure. After the resection there is no longer contact in the affected joint, however, some patients can experience instability or impingement between the forearm bones. With ulnar head implant replacement may the load transfer and the stability between the forearm bones less affected. Studies with good long term results are published with both resection and replacement. However, these methods were never compared and thus it is not clear, which of the methods gives the best clinical result and less complications.

The aim of this study is to compare Darrach procedure with ulnar head replacement in a prospective randomized multicenter study. The study would be coordinated from Østfold Hospital Trust, and Oslo University Hospital, Haukeland University Hospital, Innlandet Hospital Trust, University Hospital of St Olav and University Hospital of North Norway would participate this study.

Participants would be included among individuals seeking treatment for their stable but painful DRUJ joints. Informed consent will be gained from every participant. The group size was calculated to 20 participants in both groups.

Participants will be randomized to either Darrach procedure or ulnar head implant. The procedures would be carried out standardized in every center. No further stabilization procedure for the ulna stump would be used in resection. Herbert UHP implant (Herbert Ulnar Head Prosthesis, KLS Martin, Germany) would be used for ulnar head replacement. Postoperative treatment and follow up would be identical between the groups.

Range of motion and grip strength measures and functional scores would be registered by an independent hand therapist before operation, after 3 months, 1 and 5 years. Eventual complications and reoperations would be also registered.

Patient related outcome measure scores, range of motion and grip strength would be registered as outcomes. The results would be checked for normal distribution and either parametric or non parametric statistical tests would be chosen for comparison of the two groups.

The null hypothesis is that Darrach procedure and ulnar head replacement with implant gives similar functional results, similar frequency of complication and reoperations.

Connect with a study center

  • Innlandet Hospital Trust

    Lillehammer, Oppland 2629
    Norway

    Site Not Available

  • Østfold Hospital Trust

    Moss, Østfold 1535
    Norway

    Active - Recruiting

  • Haukeland University Hospital

    Bergen, 5021
    Norway

    Site Not Available

  • Oslo University Hospital

    Oslo, 0424
    Norway

    Active - Recruiting

  • University Hospital of North Norway

    Tromsø, 9038
    Norway

    Site Not Available

  • University Hospital of St Olav

    Trondheim, 7006
    Norway

    Site Not Available

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