BARE SPOT LOCATION IN GLENOID CAVITY: COMPARISON BETWEEN ARTHROSCOPY AND CT SCAN

Area of Science:

• Orthopedic Surgery
• Anatomy
• Biomechanical Analysis

Background:

• Rotator cuff injuries often involve the glenoid cavity.
• Understanding the precise location of the Bare Spot is critical for successful surgical repair.
• Previous studies have not fully quantified the positional displacement of the Bare Spot.

Purpose of the Study:

• To determine the proportional displacement of the Bare Spot in patients indicated for rotator cuff repair.
• To quantitatively assess the anterior versus posterior positioning of the Bare Spot relative to the glenoid cavity margins.

Main Methods:

• Evaluated 35 patients with surgical indications for rotator cuff repair.
• Measured distances from the Bare Spot to the anterior (BS-A) and posterior (BS-P) glenoid edges using arthroscopy and CT.
• Utilized 3D reconstruction of the scapula for precise anatomical measurements.

Main Results:

• The Bare Spot-to-anterior edge distance (BS-A) averaged 11.6-12.25 mm.
• The Bare Spot-to-posterior edge distance (BS-P) averaged 15.5-16.25 mm.
• Statistical analysis showed significant differences (p < 0.005) in measurements between methods.

Conclusions:

• The Bare Spot demonstrates significant anterior displacement.
• This displacement accounts for approximately 40% of the anterior glenoid margin and 60% of the posterior margin.
• Accurate anatomical assessment is vital for surgical planning in rotator cuff repair.