Unicompartmental replacement for medial compartment gonarthrosis: preliminary report

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Medial compartment gonarthrosis is a common cause of knee pain and disability.
• Unicompartmental knee replacement offers a less invasive alternative to total knee replacement for isolated medial compartment arthritis.

Purpose of the Study:

• To evaluate the clinical outcomes of unicompartmental knee replacement using the Marmor prosthesis for medial compartment gonarthrosis.

Main Methods:

• Retrospective analysis of 40 knees (37 patients) who underwent Marmor unicompartmental knee replacement.
• Assessment of outcomes based on patient follow-up, categorizing results as excellent, good, or failure.
• Emphasis on meticulous surgical technique, including osteophyte removal and component alignment.

Main Results:

• Out of 27 available follow-ups, 18 cases were rated excellent and seven as good.
• Two cases were considered surgical failures.
• Successful outcomes were associated with meticulous osteophyte removal and accurate femoral component alignment.

Conclusions:

• Unicompartmental knee replacement with the Marmor prosthesis can yield excellent or good results for medial compartment gonarthrosis.
• Surgical technique, particularly osteophyte management and component alignment, is critical for successful outcomes.
• Early mobilization and preservation of articular surfaces contribute to favorable patient reports.