Yes! Monteggia fracture includes ulnar shaft 1/3 fracture with dislocation of radial head, which is very firm after internal fixation. After the reduction of radial head dislocation, the ligament that stabilizes the elbow joint needs to be repaired, and the repair of ligament needs plaster fixation and immobilization. Generally, the braking time of elbow joint is 3 weeks, and functional exercise begins after 3 weeks, otherwise the joint will be stiff. Therefore, under normal circumstances, after Monteggia fracture surgery, the plaster is braked for 3 weeks, and then the elbow joint moves passively, gradually increasing the movement angle, then actively moving, and finally bearing the weight.
However, under special circumstances, your fracture is called rolling, and the internal fixation is not firm enough, which requires long-term braking to facilitate healing. You need to consult the doctor who operated on you.
Anyway, as you said, it is no problem to take off the plaster in 1-2 days. Early functional exercise is correct.