A series of 105 patellar fractures were evaluated for the range of mobility of the knee-joint, pain, limping and the force of the extensors of the knee. Concomitant jnjuries and the step-off of articular surface after the treatment entailed a great risk of a poor result. The best results were obtained by the tension-band wiring with K-wire and the combination treatment of tension-band wiring and circumferential wiring.