Malpositioning of radial head prostheses: An in vitro study

Radial head replacement with a bipolar system: a minimum 2-year follow-up

“…There is basic science evidence that these bipolar designs better reproduce the kinematics of the elbow after radial head replacement. 27 The Katalyst Radial Head (Integra, Plainsboro, NJ, USA) is a bipolar implant with a smooth telescoping stem. The stem design allows for the precise restoration of radial column ''length'' in situ, without the need to release the lateral collateral ligament and common extensor origin when they are intact.…”

Fractures of the Radial Head

“…Monobloc and bipolar metal implants, both cemented and cementless, have proven to restore elbow stability, even in unstable elbow fracture-dislocations. 39,40,[42][43][44] Therefore, in the setting of unstable fracture-dislocations, radial head replacement is the treatment of choice for unreconstructable fractures. 45 Promising shortterm and midterm results have been reported; however, the long-term results are unknown.…”

“…Furthermore, implantation of a radial head prosthesis is a technically demanding procedure. Yian and colleagues 44 showed that even in optimal in vitro conditions, the anatomic implantation of a radial head prosthesis was not reproducible. Biomechanical studies have shown that different sizes and orientations influence elbow kinematics and load transmission.…”

Comminuted radial head fractures: aspects of current management

“…36 This may be particularly important if the radial head prosthesis is malpositioned and in the presence of concomitant elbow injuries conferring instability. 91 In addition, by splitting motion between 2 articular interfaces, the stresses on the capitellar cartilage and the stemebone interface may be reduced. Bipolar prostheses have been shown to be as effective as monoblock prostheses in restoring valgus stability in the elbow with medial collateral ligament disruption, 59 although neither function as good as the native head.…”