The December 2014 Shoulder &
The June 2014 Shoulder &
The October 2013 Shoulder &
The August 2012 Shoulder &
The October 2014 Shoulder &
The February 2014 Shoulder &
The February 2013 Shoulder &
The December 2012 Shoulder &
The June 2012 Shoulder &
The April 2014 Shoulder &
The October 2012 Shoulder &
Post-traumatic
We undertook this study to determine the minimum
amount of coronoid necessary to stabilise an otherwise intact elbow
joint. Regan–Morrey types II and III, plus medial and lateral oblique
coronoid fractures, collectively termed type IV fractures, were
simulated in nine fresh cadavers. An electromagnetic tracking system
defined the three-dimensional stability of the ulna relative to
the humerus. The coronoid surface area accounts for 59% of the anterior articulation.
Alteration in valgus, internal and external rotation occurred only
with a type III coronoid fracture, accounting for 68% of the coronoid
and 40% of the entire articular surface. A type II fracture removed
42% of the coronoid articulation and 25% of the entire articular
surface but was associated with valgus and external rotational changes
only when the radial head was removed, thereby removing 67% of the
articular surface. We conclude that all type III fractures, as defined here, are
unstable, even with intact ligaments and a radial head. However,
a type II deficiency is stable unless the radial head is removed.
Our study suggests that isolated medial-oblique or lateral-oblique
fractures, and even a type II fracture with intact ligaments and
a functional radial head, can be clinically stable, which is consistent
with clinical observation.
The February 2024 Shoulder &
The December 2023 Shoulder &
The April 2023 Shoulder &
The October 2023 Shoulder &
The October 2024 Shoulder &
Aims. This study aimed to determine the minimal detectable change (MDC), minimal clinically important difference (MCID), and substantial clinical benefit (SCB) under distribution- and anchor-based methods for the Mayo