The Fulkerson osteotomy has proved to be a reliable treatment for subluxation of the patella due to malalignment. Aggressive rehabilitation in the early postoperative period is unwise since the proximal tibia is weakened by the oblique osteotomy. Early weight-bearing and unrestricted activity have caused fractures in a few patients. Even late in the postoperative period the osteotomy may adversely influence the biomechanical properties of the proximal tibia.We describe two athletes who sustained a fracture of the proximal tibia, during recreational activities, six months after a Fulkerson osteotomy. Both had been bearing full weight for about ten weeks without complaint. Bony healing of the osteotomy had been demonstrated on plain radiographs at ten and at 12 weeks. After a Fulkerson osteotomy, jogging and activities which impose considerable impact force should be discouraged for at least nine to 12 months. tibia occurring within the first 13 weeks with early weightbearing. The postoperative regime was therefore changed with full weight-bearing allowed only after the osteotomy had consolidated. 2-4 Sports were discouraged for at least six months.
5We describe two patients who sustained a fracture of the proximal tibia during recreational sports six months after a Fulkerson procedure.
Case reportsTwo men, aged 30 and 51 years, underwent anteromedialisation of the tibial tuberosity for chronic patellofemoral pain. Both had subluxing malalignment with positive clinical and arthroscopic findings of patellofemoral osteoarthritis. After a lateral release, an anteromedial tibial tubercle transfer was carried out as described by Fulkerson, 1 with an osteotomy angle of 45°. The postoperative regimen of physiotherapy included unrestricted passive and active mobilisation and toe-touch weight-bearing with a detachable knee immobiliser for six weeks. Full weightbearing was not allowed until the osteotomy had consolidated. Neither patient had skeletal dysplasia, metabolic bone disease or other types of skeletal disorder. After six months, while jogging, both patients sustained transverse, undisplaced fractures of the proximal tibia (Fig. 1). The mechanism of injury was a stumble and fall with distortion of the knee. Both patients had started weightbearing two weeks after the osteotomy had consolidated, as shown on plain radiographs taken at 12 and at 14 weeks after surgery.These were the only such injuries in our series of 37 osteotomies of the tibial tuberosity. In both cases, the fracture occurred at the level of the inferior aspect of the osteotomy. Treatment was by immobilisation in a long leg cast and healing occurred without complication (Fig. 2). When seen at 24 months, both patients had a full range of movement. The clinical results were excellent (95/100 points) and good (85/100 points) according to a modified Lysholm knee score. 6,7 Pain was rated on a visual analogue scale from 0 to 100 and decreased from 80 to 20 and from 40 to 30, respectively.
DiscussionThe Fulkerson procedure 1 is one of the more common techn...