A Review of Pediatric Distal Radius Buckle Fractures and the Current Understanding of Angled Buckle Fractures

Distal radius buckle fractures (DRBFs) are the most common pediatric fractures and resemble the rounded portion of a Greek pillar or torus. They result from compressive forces applied to a child's highly plastic radius. DRBFs lack cortical and physeal disruption, which makes them relatively stable. In this review, we discuss angled DRBFs, a hypothesized subset of buckle fractures that results from an off-center compressive force. Some authors refute the existence of angled DRBFs, instead proposing new criteria for DRBF classification: measuring more than 1 cm away from the physis with two to three inflection points. Without universal diagnostic criteria, misdiagnosis is common, and the utilization of flexible treatment modalities is infrequent. Rigid immobilization with short-arm casting continues to be the mainstay of treatment in clinical practice. Yet, new protocols implementing removable elastic bandages have had comparable results to casting, including reduced healthcare expenditure, less stiffness, and improved convenience and patient tolerability. Despite the discrepancies in categorizing DRBFs, complication rates remain low, and diagnostic confusion insignificantly affects clinical outcomes. Angled DRBFs have been theorized to have intraphyseal extension, making them unstable Salter-Harris fractures. Radiographic evidence supporting or denying this claim is limited. Further research is essential to determine the stability of the angled DRBF subtype and whether they should continue to be defined and managed as buckle fractures.