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Changes in ankle joint motion after Supramalleolar osteotomy: a cadaveric model
Hak Jun Kim1, Eui Dong Yeo2, Im Joo Rhyu3
1Department of Orthopedic Surgery, Guro Hospital, Korea University College of Medicine, 80 Gurodong, Gurogu, Seoul, 152-703, South Korea.
BMC Musculoskeletal Disorders
|September 11, 2017
Summary
Supramalleolar osteotomy (SMO) without fibular osteotomy showed similar ankle joint motion and plantar pressure changes for both supra-syndesmotic (SS) and intra-syndesmotic (IS) approaches. Intra-syndesmotic SMO may be preferred to reduce lateral cortex fracture risk.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Anatomy
Background:
- Ankle malalignment can lead to asymmetrical joint loading.
- The necessity of concurrent fibular osteotomy during medial open wedge supramalleolar osteotomy (SMO) is debated.
- This study investigates the biomechanical effects of SMO without fibular osteotomy.
Purpose of the Study:
- To assess changes in ankle joint motion and plantar pressure after supramalleolar osteotomy (SMO) without fibular osteotomy.
- To compare the biomechanical outcomes of supra-syndesmotic (SS) SMO and intra-syndesmotic (IS) SMO.
Main Methods:
- Ten human cadaveric lower leg specimens were used.
- Ankle motion and plantar pressure were measured for SS-SMO and IS-SMO under axial compression.
- Measurements included joint gap, point, angles, and center of force (COF) using TekScan sensors.
Main Results:
- No statistically significant differences in ankle joint motion or plantar pressure shifts were observed between SS-SMO and IS-SMO.
- A slight anterolateral shift in the center of force was noted but was not statistically significant.
Conclusions:
- Both SS-SMO and IS-SMO, when performed with an intact fibula, yield similar biomechanical effects on the ankle joint.
- Intra-syndesmotic SMO warrants careful consideration for osteoarthrosis treatment without fibular osteotomy due to a potentially lower risk of lateral cortex fracture.
