If a plaster cast becomes loose, it should be removed and replaced with a new one, preferably waiting until the fracture has become sticky enough (+/- 4 weeks) to avoid losing the reduction during the replacement procedure.
The non-weight bearing should be maintained for 2-4 weeks depending on the fracture type.
Then graduated partial weight-bearing should be started and increased to full weight bearing by about 6 weeks.
Depending on fracture type, consideration of the transition from a long cast to a patellar tendon bearing cast should be made.
Weight-bearing requires protection of the cast bottom with a cast shoe, oversized sneaker, or equivalent.
Tibial shaft fractures usually take between 3 and 5 months for complete healing. If the foot is in a functional position, graduated partial weight bearing can begin as soon as possible comfort and presumed fracture stability permit.
Caution: For unstable fractures or fractures involving the knee or ankle joint, weight-bearing should be delayed until healing is further advanced.