How to Measure Glenoid Bone Stock and Version and Why It Is Important: A Practical Guide

Area of Science:

• Orthopedics
• Radiology
• Biomedical Engineering

Background:

• Shoulder osteoarthritis (OA) is a prevalent, debilitating condition in individuals over 60, causing cartilage destruction, pain, and limited mobility.
• Surgical interventions like shoulder arthroplasty are increasing, but complications such as component loosening remain a concern.
• Preoperative rotator cuff fatty infiltration is linked to postoperative glenoid component loosening and poorer surgical outcomes.

Purpose of the Study:

• To highlight the role of advanced imaging techniques in the preoperative evaluation of shoulder osteoarthritis.
• To discuss methods for measuring glenoid version and bone stock.
• To explain the classification of glenoid morphology using the Walch classification for surgical planning.

Main Methods:

• Utilized advanced imaging techniques, including 3D CT and MRI, for preoperative shoulder assessment.
• Illustrated methods for measuring glenoid version and bone stock using Friedman and paleoglenoid lines.
• Demonstrated the classification of glenoid morphology subtypes based on the Walch classification.

Main Results:

• High-grade rotator cuff fatty infiltration correlates with more severe Walch classification subtypes.
• Preoperative fatty infiltration is associated with increased joint line medialization, glenoid bone loss, and pathologic glenoid version.
• Accurate measurement and classification of glenoid parameters are crucial for effective surgical planning.

Conclusions:

• Advanced imaging is essential for comprehensive preoperative evaluation in shoulder OA.
• Understanding glenoid morphology and bone stock through techniques like CT and MRI aids in predicting and mitigating surgical complications.
• Improved preoperative assessment can lead to better patient outcomes and reduced revision surgery rates.