The distal part of the forearm is divided into the physis, metaphysis, diaphyseal metaphyseal junction (DMJ) and diaphysis. The treatment of radial DMJ fractures is challenging because this region has diaphyseal characteristics. We speculated that the stability of metaphyseal fractures could vary depending on their proximity to the DMJ or physis. Our study aimed to investigate the stability of pediatric distal radius fractures in the physis, metaphysis and DMJ. Ninety-five patients were classified into three groups: group D, fracture line located within 1/2 of the width of the radius (WOR) from the physis; group M, fracture line located between 1/2 and 1 WOR from the physis; and group P, fracture line located between 1 and 2 WOR from the physis. We measured sagittal angulation and coronal angulation. A correction loss of less than 9° was defined as a ‘stable reduction’ outcome and one greater than 10° as a ‘loss of reduction’ outcome. The correction losses for sagittal angulation were significantly greater in groups M and P than in group D. The correction losses for coronal angulation were significantly greater in group P than in groups D and M. The incidence of ‘loss of reduction’ outcomes was significantly higher in groups M and P than in group D. The proximal segments of distal radial metaphyseal and DMJ fractures showed less angular stability than distal segments.

前臂远端分为骨骺、干骺端、骨干干骺端交界处（DMJ）和骨干。桡骨 DMJ 骨折的治疗具有挑战性，因为该区域具有骨干特征。我们推测干骺端骨折的稳定性可能会根据其与 DMJ 或骺板的接近程度而变化。我们的研究旨在调查儿童桡骨远端骨折的骺板、干骺端和后关节连接处的稳定性。95例患者分为三组：D组，骨折线位于距骨骺的桡骨宽度（WOR）1/2以内；M组，骨折线位于距骨骺1/2至1 WOR之间；P 组，骨折线位于距骨骺 1 至 2 WOR 之间。我们测量了矢状角和冠状角。小于 9° 的矫正损失被定义为“稳定复位”结果，大于 10° 的矫正损失被定义为“复位损失”结果。M 组和 P 组的矢状角矫正损失显着大于 D 组。P 组的冠状角矫正损失显着大于 D 组和 M 组。“复位损失”结果的发生率显着更高M 组和 P 组的角度稳定性高于 D 组。远端桡骨干骺端和 DMJ 骨折的近端节段的角度稳定性低于远端节段。