Use a straight posterior skin incision.
A lateral skin flap can be raised for a lateral exposure (Kaplan or Kocher) of the radius if needed.
A medial skin flap (Taylor and Scham, or “Over the top”) can be raised for medial exposure of the coronoid fracture if needed.
Exposure of a coronoid fracture is improved by elevating the fractured olecranon on the triceps as with an osteotomy.
If a second medial plate will be used to secure the coronoid, one can - after taking care to protect the ulnar nerve - either elevate the entire flexor pronator mass (Taylor and Sham) or use the interval where the ulnar nerve lies in the split of the FCU (“Over the top” or Hotchkiss).
During the exposure it should be verified whether the lateral collateral ligament origin is avulsed from the lateral epicondyle or not.
The radial head can be accessed either by recreating the apex posterior fracture of the proximal ulna - thereby subluxation or dislocating the radial head posterior to the capitellum as typically occurs in this injury - or one can use a separate lateral muscle interval (Kocher or Kaplan).
For most fractures of the radial head that are replaced with a prosthesis or have a repairable partial articular fracture, recreating the deformity and using and perhaps slightly enlarging the rent in the anconeus muscle usually provides sufficient exposure of the radius.