Complete dislocation of the knee is relatively rare. Robbins1 stated that up to 1909 only 270 cases had been reported in the literature, of which 114 were of the forward or anterior type of complete dislocation. Ritter2 reported that complete dislocation of the knee was observed in only 1 of 23,000 patients admitted to the Reconstruction Hospital in New York. Ransohoff3 stated that at the Cincinnati General Hospital only 3 persons with complete dislocation of the knee had been encountered in a period of twenty-eight years—1 had posterior and lateral dislocation, 1 anterior and lateral dislocation and 1 incomplete lateral dislocation.
As is well known, there are five types of dislocation: (a) anterior, (b) posterior, (c) medial, (d) lateral and (e) rotary. These are named according to the ways in which the tibia is displaced on the femur.
There is always considerable tearing of the lateral and
ANDERSON RL. DISLOCATION OF THE KNEEREPORT OF FOUR CASES. Arch Surg. 1943;46(5):598-603. doi:10.1001/archsurg.1943.01220110014003