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Lawrence design first metatarsophalangeal prosthesis. A complication
Journal of the American Podiatric Medical Association
|August 1, 1989
Summary
Tibial sesamoid impingement is a complication of the Lawrence first metatarsophalangeal implant. This issue may be worsened by the implant design that preserves the sesamoid apparatus.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
Background:
- The first metatarsophalangeal (MTP) joint is crucial for foot biomechanics.
- Hallux valgus and arthritis often necessitate MTP joint implants.
- The Lawrence implant is designed to preserve the sesamoid apparatus.
Observation:
- A specific complication involving tibial sesamoid impingement within the hinge of the Lawrence first MTP implant was observed.
- This impingement occurs at a critical juncture of the implant's articulation.
Findings:
- Tibial sesamoid impingement is a potential complication associated with the Lawrence first MTP implant.
- The implant's design, which preserves the sesamoid apparatus, may contribute to or accentuate this impingement.
- This mechanical issue can affect implant function and patient outcomes.
Implications:
- Consideration of sesamoid apparatus preservation in MTP implant design requires careful evaluation.
- Potential modifications to the Lawrence implant or surgical technique may be needed to mitigate impingement risk.
- Further research is warranted to understand the long-term effects of this complication on MTP joint function.