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Friberg Equation to Predict Pediatric Distal Forearm Fracture Remodeling
Stephanie S Pearce1, Michael W Honeycutt1, William A Cutchen1
1Department of Orthopaedic Surgery, University of South Alabama, Mobile, AL.
Background:
This study is the first to test Friberg's equation's (Vt=V0[e]) accuracy in predicting the residual angular deformity in pediatric distal forearm fractures.
Methods:
Angular deformities from distal forearm fractures in 50 children (mean age, 9 y) were retrospectively measured on follow-up radiographs once healed and compared to extrapolated angles at respective follow-up intervals from 2013 to 2015.
Results:
The predicted and actual angulations from 120 radiographs (mean follow-up, 3mo) showed that the mean predicted angle was similar to the measured angle in the radioulnar plane and only 2 degrees greater than the measured angle in the dorsovolar plane. A strong correlation was observed between predicted and measured angles in both planes.
Conclusions:
Friberg's equation is a valid tool for predicting remodeling potential in pediatric distal 25% forearm fractures.
Level Of Evidence:
Prognostic Study-Level II.
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