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Anatomical attachments to the proximal phalangeal base--a case for stability
1Department of Plastic and Reconstructive Surgery, Johannesburg Hospital, University of the Witwatersrand, Gauteng, South Africa. surgeon@iafrica.com
Summary
Fractures at the base of the proximal phalanx may be stable due to surrounding anatomical structures. This study details these attachments, explaining why some proximal phalanx base fractures benefit from conservative treatment.
Area of Science:
- Orthopedic Surgery
- Anatomy
- Hand Surgery
Background:
- Transverse midshaft fractures of the proximal phalanx typically require surgical intervention.
- Fractures at the base of the proximal phalanx can sometimes be managed non-surgically.
Purpose of the Study:
- To anatomically elucidate the structures contributing to the stability of proximal phalanx base fractures.
- To define the extent of anatomical structure attachments to the proximal phalanx base.
Main Methods:
- Anatomical dissection and measurement of structure attachments.
- Review of fracture stability in relation to anatomical splinting.
Main Results:
- Detailed mapping of the attachments of the joint capsule, collateral ligaments, accessory collateral ligaments, interosseous muscles, and volar plate to the proximal phalanx base.
- Identification of the proximal 6-9 mm of the phalanx base as a critical zone for stability.
Conclusions:
- The collective support from surrounding soft tissues provides inherent stability to proximal phalangeal base fractures.
- Understanding these anatomical contributions can guide conservative treatment protocols for specific proximal phalanx base fractures.