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Fractures: Bone Repair

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...

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Related Experiment Video

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Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis

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Quantifying bone loss and lateralization with standardized baseplate versus augmented baseplates.

Anup Shah^1,2, Brian Werner³, Rueben Gobezie⁴

¹Department of Orthopedic Surgery, University of Arizona, College of Medicine - Phoenix, Phoenix, AZ, USA.

JSES International

|September 16, 2024

Summary

Augmented baseplates in reverse shoulder arthroplasty significantly reduce bone removal by approximately 50% and provide 2.4 mm of true lateralization compared to standard baseplates.

Keywords:

Augmented baseplate Baseplate position Glenoid bone loss Glenoid inclination Reverse shoulder angle Reverse shoulder arthroplasty

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Area of Science:

Orthopedic Surgery
Biomedical Engineering
Radiology

Background:

Reverse shoulder arthroplasty is a key treatment for complex shoulder conditions.
Augmented baseplates can correct glenoid deformities.
Quantification of bone loss and lateralization with augmented baseplates is not well-established.

Purpose of the Study:

To compare bone removal volume and net lateralization between standard and augmented baseplates.
To evaluate augmented baseplates for correcting glenoid inclination and retroversion.

Main Methods:

CT scans of 21 patients with varying glenoid inclination were analyzed.
Four surgeons virtually placed neutral and augmented baseplates.
Bone reaming volume and net lateralization were calculated after correcting glenoid parameters.

Main Results:

Augmented baseplates led to ~50% less bone removal (619 mm³ vs. 1102 mm³).
A 10-degree augmented baseplate resulted in 2.4 mm greater lateralization.
Similar baseplate backside seating was achieved with both types of baseplates.

Conclusions:

Augmented baseplates offer substantial bone preservation in shoulder arthroplasty.
They provide predictable lateralization, aiding in anatomical restoration.
This study quantifies the benefits of augmented baseplates for glenoid correction.