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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
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A novel method for localization of the maximum glenoid bone defect during reverse shoulder arthroplasty
Graeme T Harding1, Aaron J Bois2,3, Martin J Bouliane1
1Division of Orthopaedic Surgery, University of Alberta, Edmonton, Alberta, Canada.
JSES International
|July 5, 2021
Summary
Preoperative planning for reverse shoulder arthroplasty effectively localizes glenoid bone defects. This study shows the maximum defect is reliably found perpendicular to the glenoid reaming line using 3D planning software.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Radiology
Background:
- Managing glenoid bone defects in reverse shoulder arthroplasty presents significant challenges.
- Accurate preoperative assessment of bone defects is crucial for successful surgical outcomes.
Purpose of the Study:
- To preoperatively localize the maximal depth of glenoid bone defects relative to glenoid reaming.
- To evaluate the reliability of 3D planning software in identifying glenoid defect locations.
Main Methods:
- Thirty preoperative shoulder CT scans were analyzed using 3D Blueprint planning software.
- Three assessors created surgical plans, maintaining a constant reaming axis.
- The position of maximum glenoid defect was localized on both 2D and 3D images.
Main Results:
- The mean difference between 2D and 3D defect localization was 5.4°.
- Correlation between 2D and 3D angles was nearly perfect, with high inter-rater and intra-rater reliability.
- 85.1% of maximal defects were within 9° of perpendicular to the ream line.
Conclusions:
- Blueprint planning software reliably locates the maximum glenoid bone defect perpendicular to the glenoid ream line.
- This method offers a standardized approach for managing glenoid bone defects in reverse shoulder arthroplasty.