[Hip joint arthrodesis using the cobra plate. Indication, technique, outcome]

Area of Science:

• Orthopedic Surgery
• Surgical Techniques
• Hip Joint Reconstruction

Background:

• Hip arthrodesis is infrequently performed due to advancements in total hip replacement.
• Indications include severe hip joint deterioration, pain, limited motion, and contraindications to joint replacement, particularly in young patients.
• Specific conditions like sepsis, slipped capital epiphysis, Perthes' disease, trauma, paralysis, or muscle loss necessitate hip fusion.

Purpose of the Study:

• To evaluate the efficacy and outcomes of hip arthrodesis using the cobra plate.
• To assess complication rates, union rates, and functional results in patients undergoing this procedure.

Main Methods:

• A retrospective review of 20 consecutive patients who underwent hip arthrodesis with a cobra plate between 1980 and 1990.
• Radiographic and clinical follow-up was conducted for all patients.

Main Results:

• A 20% complication rate (5 out of 25 cases) was observed, including two cases of infection and two requiring re-osteosynthesis with bone grafting.
• All patients achieved radiographic union, with 13 reporting pain-free ambulation.
• Five patients expressed dissatisfaction due to the functional limitations of a fused hip.

Conclusions:

• Hip arthrodesis with the cobra plate is a technically challenging procedure but allows for early mobilization and partial weight-bearing.
• The risk of non-union is low compared to other surgical methods.
• Proper surgical technique is crucial for minimizing functional problems and achieving satisfactory outcomes.