CHAPTER 1 History and Evolution of Hip Surgery
Overview of the evolution of hip surgery
Other Procedures
Proximal femoral osteotomy
Early on, adult sequelae of developmental hip dysplasia were the most common indications for an ITO (Table 1-1). Early reports of realignment osteotomies of the proximal femur involved either displacement or angulation. Hip dysplasia was the first application of this procedure, although now it rarely constitutes an indication, at least for an isolated femoral osteotomy. Adolf Lorenz (1919) described his “bifurkation” operation, and Schanz (1922)—among others—also introduced a variation of Kirmission’s procedure, mainly for unreduced congenital dislocation of the hip. Both of these procedures were of the pelvic support osteotomy type. Lorenz outlined ten indications for his procedure, with advanced osteoarthritis being the eighth. In his report in 1935, McMurray from Liverpool adopted Lorenz’s procedure, and he is the one who popularized proximal femoral osteotomy for the treatment of osteoarthritis. The so-called Lorenz-McMurray procedure was described—but not performed in reality—as an excessively oblique cut (Figure 1-1). Although it was originally described as a purely displacement osteotomy, it did secondarily employ valgus angulation. McMurray believed that the primary mechanism of pain relief was the bypass of the proximal femur during the transmission of loads from the pelvis to the distal fragment. Displacement osteotomies were widely used in England, with Malkin (earlier) and Nissen (later) being their most eminent proponents.
The prototype angulation osteotomy was described in 1950 by Pauwels, who designed a varus osteotomy above the lesser trochanter without displacement; he initially applied this procedure to young adults with hip dysplasia associated with the subluxation of a spherical femoral head. In 1956, he introduced valgus osteotomy for those hips that obtained improved congruity in adduction and for nonunited fractures of the femoral neck. About 10 years after the original description by Pauwels, the procedure came to include the medial displacement of the distal fragment (Figure 1-2).
His ideas were taken a step further by Bombelli, who reached the same conclusions through a modified consideration of the primary hip forces. In addition to his theoretical model, Bombelli also modified Pauwels’s valgus osteotomy by adding extension in the sagittal plane for improved femoral head coverage in dysplasia, for the relief of flexion contracture, and for the correction of hyperlordosis. He also suggested that, in the case of a valgus osteotomy, one should exploit the inferomedial capital drop osteophyte (Figure 1-3) and put the lateral capsule to enough stretch to stimulate the formation of the roof osteophyte, both for the purpose of increasing the weight-bearing area of the joint.