Lunocapitate Fusion in Snac Wrist

Results of Lunocapitate Fusion in Mangement of Scaphoid Non Union Advanced Collapse (SNAC Wrist)

Scaphoid fractures are common, accounting for approximately 60-70% of all carpal bone fractures. StatPearls. Scaphoid Wrist Fracture. (2024). (A significant challenge is the high rate of missed or delayed diagnosis, which occurs in up to 30% of cases initially, often due to subtle radiographic findings). [Orthobullets - Acute Scaphoid Fractures] This is critical because 10-20% of acute scaphoid fractures are prone to nonunion even with appropriate treatment,[ResearhGate - Scaphoid Non-Union]. a risk that rises dramatically to over 80-90% if the fracture is completely untreated or missed.ResearchGate Nonunion can lead to scaphoid nonunion advanced collapse (SNAC) is a progressive and debilitating wrist disorder that arises from an untreated scaphoid fracture, leading to characteristic patterns of osteoarthritis. Surgical intervention is often required to alleviate pain and improve function.National Library Of Medicine Treatment strategies vary based on fracture timing and union status. For acute, nondisplaced fractures, non-surgical management with cast immobilization for 8-12 weeks is the standard initial approach, For displaced acute fractures or cases of established nonunion, surgical intervention is mandatory. Options include open reduction and internal fixation (ORIF) with a compression screw, often with bone grafting. In advanced stages where arthritis has developed (SNAC wrist), salvage procedures like proximal row carpectomy or limited carpal fusions are required. [Orthobullets - Scaphoid Fracture Among the available salvage procedures, lunocapitate (LC) fusion with scaphoid excision presents a compelling surgical option. This technique aims to reduce pain by eliminating the arthritic joint surfaces and stabilizing the midcarpal joint. The theoretical advantages of LC fusion include a simplified biomechanicalconstruct with fewer fusion surfaces, which may potentially lead to a higher rate of arthrodesis, and preservation of a functional range of motion. However, comprehensive prospective studies detailing the outcomes, union rates, and complication profile of this specific procedure are still relatively scarce in the literature. ResearchGate - Lunate-capitate arthrodesis (2024)]. This study is designed to prospectively evaluate the efficacy and safety of lunocapitate fusion as a primary surgical treatment for SNAC wrist. The rationale is to provide robust clinical data that can solidify the role of LC fusion in the management algorithm of this condition.

Lunocapitate (LC) fusion has emerged as a promising salvage technique. By reducing the number of fusion sites compared to other procedures, it aims to achieve a higher union rate, reduce operative time, and better preserve wrist motion. However,comprehensive prospective data on its outcomes are still needed. This study will prospectively evaluate the efficacy and safety of lunocapitate fusion as a primary surgical treatment for SNAC wrist.

Study Overview

• Status: Not yet recruiting
• Conditions: Snac Wrist
• Intervention / Treatment: Procedure: Results of lunocapitate fusion in mangement of scaphoid non union Advanced collapse (SNAC wrist); Procedure: Lunocapitate fusion in snac wrist

• Study Type: Interventional
• Enrollment (Estimated): 35
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Ahmed Hany Ahmed; Phone Number: 00201151469790; Email: ahani3964@gmail.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• 1- Age 18-60 years 2- symptomatic SNAC wrist failed conservative management.

Exclusion Criteria:

• 1- total wrist Arthritis 2-systemic arthropathy 3-Infected wrist

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Lunocapitate fusion

Procedure: Results of lunocapitate fusion in mangement of scaphoid non union Advanced collapse (SNAC wrist); Lunocapitate fusion in snac wrist; Procedure: Lunocapitate fusion in snac wrist; Lunocapitate (LC) fusion has emerged as a promising salvage technique. By reducing the number of fusion sites compared to other procedures, it aims to achieve a higher union rate, reduce operative time, and better preserve wrist motion. However,comprehensive prospective data on its outcomes are still needed. This study will prospectively evaluate the efficacy and safety of lunocapitate fusion as a primary surgical treatment for SNAC wrist.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
DASH SCORE	12 month
Functional outcome measured by the DASH score at 12 months post-operation	12 month

Collaborators and Investigators

• Sponsor: Assiut University

Publications and helpful links

Helpful Links

• Related Info

Study record dates

Study Major Dates

• Study Start (Estimated): January 1, 2026
• Primary Completion (Estimated): December 30, 2028
• Study Completion (Estimated): March 10, 2029

Study Registration Dates

• First Submitted: December 31, 2025
• First Submitted That Met QC Criteria: January 2, 2026
• First Posted (Actual): January 13, 2026

Study Record Updates

• Last Update Posted (Actual): January 13, 2026
• Last Update Submitted That Met QC Criteria: January 2, 2026
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Other Study ID Numbers: Snac wrist lunocapitate fusion

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No