Three sub-types of coronoid process fractures are identified.

• type 1: coronoid process tip avulsion.
• type 2: fracture of <50% of the coronoid process.
• type 3: fracture of >50% of the coronoid process.

Note that the fractured coronoid process, in this case, is associated with fracture of the radial head. The absence of dislocated elbow excludes the terrible triad of the elbow.