[Modified gluteus maximus transfer for hip abductor deficiency]

Area of Science:

• Orthopedic surgery
• Reconstructive surgery
• Hip biomechanics

Background:

• Abductor deficiency significantly impairs hip function and gait.
• Severe gluteal muscle atrophy and fatty degeneration (>50%) present a surgical challenge.

Purpose of the Study:

• To evaluate the efficacy of gluteus maximus transfer with refixation at the greater trochanter for treating abductor deficiency.

Main Methods:

• A gluteus maximus muscle flap is surgically transferred and refixed to the greater trochanter.
• The technique involves detailed incisions, flap elevation, and fixation using sutures and screws.
• The tensor fascia latae muscle may also be incorporated for reconstruction.

Main Results:

• The gluteus maximus transfer technique improved abduction function and gait patterns in short-term follow-ups.
• Fifteen patients showed an improvement in the modified Harris Hip Score (mHHS) from 48 to 60.
• The positive Trendelenburg sign decreased from 100% preoperatively to approximately 50% at follow-up.

Conclusions:

• Gluteus maximus transfer is an effective surgical option for chronic abductor deficiencies.
• The procedure demonstrates positive outcomes in improving hip function and reducing gait abnormalities.