Regan–Morrey Classification — Coronoid Fractures

I: tip avulsion; II: 50% height. II–III indicate elbow instability, commonly part of terrible triad → fixation required.

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I: tip avulsion; II: <50% height; III: >50% height. II–III indicate elbow instability, commonly part of terrible triad → fixation required.

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What does the Regan-Morrey classification primarily assess in coronoid fractures?

In the context of a Type I coronoid fracture, what is the primary stabilizer of the elbow?

What surgical management is recommended for a Type II coronoid fracture in the context of a terrible triad injury?

Which classification type in the Regan-Morrey classification indicates a fracture involving more than 50% of the coronoid height?

What is a common associated injury pattern with Type II and III coronoid fractures?

In the Regan-Morrey classification, which type of fracture is considered the least stable?

What is the primary reason for repairing even a Type I coronoid fracture in the context of a terrible triad injury?

What is the typical imaging modality used to better delineate a Type I coronoid fracture?

What is the height range of the coronoid process in adults?

Which structure primarily provides stability against posterior translation of the ulna on the humerus?