Lunatocapitate Fusion Versus Four-corner Fusion for SNAC and SLAC Arthritis.

Wrist Arthritis Clinical Trial

— MIKA  

Official title:

Lunatocapitate Fusion Versus Four-corner Fusion for SNAC and SLAC Arthritis. A Randomized Comparison.

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT03315377
• Other study ID #: MIKA1
• Status: Active, not recruiting
• Phase: N/A
• Start date: September 1, 2017
• Est. completion date: April 30, 2027

Study information

• Verified date: October 2023
• Source: Karolinska Institutet
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Hypothesis: Lunate-capitate-fusion (LCF) results in comparable outcome (i.e. not worse) to four-corner-fusion (4CF) for Scaphoid Nonunion Advanced Collapse (SNAC) and Scapholunate Advanced Collapse (SLAC) arthritis regarding functional results (grip strength).

Design: Prospective randomised comparison. Inclusion criteria: SNAC or SLAC arthritis requiring a salvage procedure (grade 2-3).

Exclusion criteria: SNAC or SLAC arthritis grade 4 (panarthritis). Inability to co-operate with the follow-up protocol (language difficulties, severe psychiatric disorder or drug addiction).

Description:

Surgical method:

Patient will be operated in axially plexus with a dorsal approach through the 3d and 4th extensor tendon compartments. The wrist joint capsule will be opened with a Berger incision. After excision of the scaphoid and preparation of the articular surfaces to be fused, the bones will be fixated with k-wires. Bone autograft from the scaphoid, crista or radius will be used according to the surgeon's preference based on the condition of the fusion surfaces. The wrist be immobilized in a short arm plaster cast until the fusions are radiologically healed after10-12 weeks. The k-wires will be extracted in local anesthesia after another 2-6 weeks.

Sample size:

This study will have a power of 80% to show that the mean grip strength for LC fusion is as least as high as the mean for 4CF (non-inferiority). This assumes that the means for the LC fusion and the 4CF are equal (at 70% of the uninjured side) with a common within-group standard deviation of 14 (Salzman et al. 2015), that a difference of 10% or less is unimportant, that the sample size in the two groups will be 25 and 25, and the alpha (1 tailed) is set at 0,05.Formally, the null hypothesis is that the mean for lunocapitate fusion is 10% lower than the mean for 4CF, and that the study has power of 80,1% to reject this null. Equivalently, the likelihood is 80,1% that the 95% confidence interval for the mean difference will exclude a difference of 10% in favor of 4CF.

We aim to include 60 patients to cover for a certain loss to follow-up.

Assessment:

Patients will be assessed regarding range of motion and grip strength and complete the DASH and PRWE questionnaires before surgery (baseline) and 1 and 2 years postoperatively.

Radiology:

Plain anterior and lateral radiographs will be obtained 1 and 2 years postoperatively for purpose of the study. According to the standard treatment protocol, clinical and radiological healing assessment will be conducted 10-12 weeks postoperatively. Radiographs will be analyzed by a radiologist.

Complications will be recorded 1 and 2 years postoperatively.

Analyzes:

The Mann-Whitney and Chi-square tests will be used for non-parametric data (DASH, PRWE and presence of arthritis and complications). T-test will be used for numerical data (ROM, grip strength).

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 64
• Est. completion date: April 30, 2027
• Est. primary completion date: April 30, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• SNAC or SLAC arthritis grade 2-3

Exclusion Criteria:

• SNAC or SLAC arthritis grade 4

• Inability to cooperate with the follow-up protocol

Related Conditions & MeSH terms

• Arthritis
• Wrist Arthritis

Intervention

Procedure:
• Lunate-Capitate Fusion (LCF)
Operation with lunate-capitate-fusion (LCF)
• Four Corner Fusion (4CF)
Operation with four-corner-fusion (4CF)

Locations

Country	Name	City	State
Sweden	Dept of Handsurgery SÖS	Stockholm

Sponsors (2)

Lead Sponsor	Collaborator
Karolinska Institutet	Skane University Hospital

Country where clinical trial is conducted

Sweden, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Grip strength	Hand grip strength measured with Jamar dynamometer	1 year postoperatively
Secondary	DASH score	Disability of the Arm, Hand and Shoulder (DASH) questionnaire	1 year postoperatively
Secondary	PRWE score	Patient Rated Wrist Evaluation (PRWE)	1 year postoperatively
Secondary	Range of motion (ROM)	Wrist ROM measured with a goniometer	1 year postoperatively
Secondary	EQ5D (for analysis of health economy)	Quality of life questionnaire	1 year postoperatively
Secondary	Complications	Infection, nonunion	1 year postoperatively
Secondary	Progress of arthritis	Radiological signs of radiocarpal arthritis on CT scans	1 year postoperatively