Simple Linear Calculating Method of Glenoid Bone Defects Using 3-Dimensional Computed Tomography Based on an East...

Area of Science:

• Orthopedic surgery
• Radiology
• Anatomy

Background:

• Preoperative evaluation of glenoid bone defects is crucial for managing anterior shoulder instability.
• A novel method predicting intact glenoid width from height is convenient but lacks validation in East Asian populations.
• Existing research on glenoid dimensions primarily focuses on Western demographics.

Purpose of the Study:

• To investigate the relationship between glenoid height and width in an East Asian cohort.
• To develop predictive formulas for glenoid width based on glenoid height for surgical planning.

Main Methods:

• A cross-sectional study involving 205 Han Chinese patients with no history of shoulder trauma or pain.
• Spiral computed tomography (CT) scans of shoulder joints were analyzed.
• Maximal glenoid height and width were measured by two blinded radiologists; Pearson correlation and linear regression were used.

Main Results:

• A strong positive linear correlation (R² = 0.68) was found between glenoid height and width in the overall cohort.
• Significant differences in mean glenoid height (36.61 mm vs. 32.39 mm) and width (25.26 mm vs. 21.54 mm) were observed between males and females.
• Predictive formulas derived: Male: width = height × 0.50 + 7 mm (R² = 0.36); Female: width = height × 0.45 + 7 mm (R² = 0.31).

Conclusions:

• Mean glenoid height and width in the East Asian population are 34.45 mm and 23.35 mm, respectively.
• Sex-specific formulas accurately predict glenoid width from height, offering a valuable tool for preoperative assessment.
• These findings are essential for tailoring surgical strategies for anterior shoulder instability in East Asian patients.