Reliably recognizing the overall pattern and specific characteristics of proximal humerus fractures may aid in surgical decision-making. With conventional onscreen imaging modalities, there is considerable and undesired interobserver variability, even when observers receive training in the application of the classification systems used. It is unclear whether three-dimensional (3D) models, which now can be fabricated with desktop printers at relatively little cost, can decrease interobserver variability in fracture classification.

中文翻译：

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3D 打印手持模型并不能提高对三部分和四部分肱骨近端骨折的具体特征和模式的识别。

可靠地识别肱骨近端骨折的总体模式和具体特征可能有助于手术决策。使用传统的屏幕成像方式，即使观察者接受了所用分类系统应用方面的培训，观察者之间也存在相当大且不期望的变异性。目前尚不清楚三维 (3D) 模型是否可以减少骨折分类中观察者之间的变异性，目前三维 (3D) 模型可以用桌面打印机以相对较低的成本制造。