Segmental Humeral Head Reconstruction in Patients with Chronic Locked Posterior Shoulder Dislocation

Area of Science:

• Orthopedic Surgery
• Musculoskeletal Research
• Regenerative Medicine

Background:

• Chronic locked posterior shoulder dislocation often involves significant bony defects (25-50%) of the humeral head.
• Evaluating functional outcomes is crucial for treatment selection in complex shoulder instability.

Purpose of the Study:

• To assess the functional results of treating chronic locked posterior shoulder dislocation with humeral head defects using allografts.
• To compare allograft reconstruction with non-anatomical methods for this specific injury pattern.

Main Methods:

• A cohort of 20 patients with chronic locked posterior shoulder dislocation and 25-50% humeral head defects were treated.
• Fresh-frozen osteochondral allografts from the femoral condyle were utilized via a deltoid pectoral approach.
• Functional outcomes were evaluated using the Constant's scoring scale.

Main Results:

• The mean Constant's score for the operated shoulders was 84.14 points.
• This average score indicates a good functional outcome following allograft treatment.
• The study demonstrates positive results for allograft reconstruction in this patient group.

Conclusions:

• Bone allografts are recommended for managing chronic locked posterior shoulder dislocation with 25-50% humeral head defects.
• Allograft reconstruction offers superior functional outcomes compared to non-anatomical reconstruction methods.
• This approach provides a viable solution for complex shoulder instability with significant bone loss.