Recovery of Forearm Bone Strength After Plate Removal: A Finite Element Analysis Study

Area of Science:

• Orthopedic surgery
• Biomechanical engineering
• Radiology

Background:

• Plate fixation is common for forearm diaphyseal fractures.
• Bone atrophy and reduced strength can occur after plate removal.

Purpose of the Study:

• To estimate bone strength over time after forearm plate removal.
• To investigate the progression of bone strength recovery.

Main Methods:

• 31 patients undergoing forearm plate removal were studied.
• Computed tomography (CT) scans and patient-specific CT-based finite element analysis were used.
• Bone strength was assessed before and at 1, 3, and 6 months after plate removal.

Main Results:

• Pre-removal bone strength was 47% of the uninjured side.
• Bone strength recovered to 66% at 1 month, 85% at 3 months, and 97% at 6 months post-removal.
• The distal ulna showed weaker bone strength and delayed recovery.

Conclusions:

• Forearm bone strength significantly recovers within 3-6 months after plate removal.
• Full bone strength recovery is achieved by 6 months, but site-specific variations exist.
• Patients require caution regarding refracture risk, especially at weaker sites like the distal ulna.