Broomstick plaster. A broomstick plaster holding apart the legs of a seven year-old boy suffering from Perthe's disease. Perthe's disease is a type of osteochondritis juvenilis, where inflammation of the growing regions of bones causes pain and deformity. This is thought to be due to a disrupted blood supply to the bone. In Perthe's disease, the head of the femur (the thigh bone) is affected. Symptoms include pain in the thigh and groin and a limp on the affected side. Treatments include resting the area, or splinting of the hip using a broomstick plaster to reduce pressure on the femur. Alternatively, surgery may be required to change the angle of the head of the femur.