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Pin-hole changes after external fixation of tubular bone
Archives of Orthopaedic and Traumatic Surgery. Archiv Fur Orthopadische Und Unfall-Chirurgie
|January 1, 1985
Summary
K-wire pins can cause bone changes and infection in rabbits. Distal pin sites showed more issues, but fixation type and duration did not impact outcomes.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Veterinary medicine
Background:
- External fixation is a common orthopedic technique.
- K-wire pins are frequently used in external fixation devices.
- Understanding pin-site complications is crucial for patient outcomes.
Purpose of the Study:
- To investigate K-wire pin-induced changes in cortical bone.
- To evaluate the effects of different fixation methods on pin sites.
- To determine the incidence of bone reactions and infections around K-wire pins.
Main Methods:
- Bilateral external fixators were applied to rabbit tibiofibular bones.
- Pins were inserted under compression, distraction, and neutralization.
- Pin sites were examined macroscopically and radiologically at defined intervals.
Main Results:
- 17.5% of pin sites showed reactive or resorptive changes.
- 2.3% of pin sites developed infections.
- Distal pin sites exhibited significantly more changes.
- Fixation type and implantation duration did not influence pin-site appearance or complications.
Conclusions:
- K-wire pin insertion can lead to significant cortical bone changes and infections.
- Distal pin placement is associated with a higher risk of complications.
- Current external fixation methods and durations do not alter the incidence of these changes.