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Hamate hook non-union treated with a break-away screw: a case report
Kiyohito Naito1, Kei Yoshikawa, Kazuo Kaneko
1Department of Orthopaedic Surgery, Juntendo University Shizuoka Hospital, Japan.
Summary
Hamate hook non-union, though rare, is increasing. Surgical treatment with debridement and a break-away screw facilitated bone union and return to sports for a baseball instructor.
Area of Science:
- Orthopedic Surgery
- Sports Medicine
- Hand Surgery
Background:
- Hamate hook non-union is an uncommon but growing injury.
- It can significantly impact athletes, particularly those in sports requiring forceful wrist movements.
Observation:
- A 25-year-old male baseball instructor presented with hamate hook non-union.
- The patient underwent surgical treatment involving debridement and osteosynthesis with a break-away screw.
Findings:
- Bone union was achieved three months post-surgery.
- The patient experienced resolution of transient ulnar paralysis.
- Full return to pre-injury sports activity was possible six months after surgery.
Implications:
- Break-away screws offer effective fixation for small bone fragments in deep surgical fields.
- This technique allows for strong compression at the fracture site with minimal soft tissue dissection.
- The successful outcome suggests a viable treatment option for athletes with hamate hook non-union.

