1 No immobilization, non-weight bearing and early motion top
Undisplaced fracture which is perfectly stable.
Nonoperative treatment is indicated if the fracture is undisplaced or minimally displaced and the joint is absolutely stable and there are no other indications for surgery (eg., neurovascular injury, compartment syndrome).
A careful knee exam with valgus/varus stress test done in both full extension and 30° of flection must be peformed. If there is any question about medial/lateral instability, or anterior/posterior stability, or rotatory instability, then further investigations such as MRI should be obtained.
Never immobilize in plaster. If splinting is necessary, then immobilize in a hinged fracture brace.
Start early active range of motion as soon as possible.
2 Posterior plaster splint top
Only as a means of temporary splinting.
3 Non-hinged fracture brace (Zimmer knee brace) topenlarge
All fractures as a means of temporary splinting.
4 Hinged fracture brace top
Angular splinting of the extremity allowing early knee motion.
As a means of definitive splinting allowing early motion.
Never immobilize in plaster. If protection is required to prevent displacement, use a hinged fracture brace to permit early motion.
Axial splinting allowing knee motion.