Smith-Petersen, Clin Orthop Relat Res 1967 - Treatment of Fractures of the Neck of the Femur by Internal Fixation

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Treatment of Fractures of the Neck of the Femur by Internal Fixation

Smith-Petersen·Clin Orthop Relat Res·1967·7 citations·Case series

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This is Smith-Petersen's landmark 1937 report summarizing his evolving technique for internal fixation of femoral neck fractures. It traces the transition from his original open-reduction approach to closed reduction with lateral nailing under biplanar radiographic control. It addresses union rates, technical principles for nail insertion, and when open reduction remains necessary.

Key Findings

Open reduction and nailing in the 26 cases that followed the original 24 achieved bony union in only 70%, slightly inferior to the original series, although function was most satisfactory.
Old femoral neck nonunion (6–24 months duration) is not hopeless: open reduction and nailing achieved 75% bony union in 12 established nonunion cases, though the mean patient age was 45 years and the authors explicitly warn this operation should not be undertaken in the elderly.
Radiographic union cannot be trusted. Smith-Petersen withdrew nails after apparent X-ray union and found nonunion in multiple cases, including 2 cases at over 1 year postoperatively. Any series with less than 2 years of follow-up is a preliminary report, not end-results — a standard that invalidates most competing implant claims of the era.
Valgus reduction is the biomechanical goal: it transmits weight-bearing loads stably across the fracture site. Varus must be avoided because it is mechanically unstable under load. Rotational malalignment in either direction limits hip motion and is unacceptable.
The lateral radiograph is not optional. Omitting it is described as the most common cause of failed reduction and nonunion. Confirmed independently by discussant Dr. Moore with a case example. The AP view alone cannot confirm rotational alignment of the distal neck fragment.
Nail extrusion during neck resorption is a mechanical feature, not a failure. If the nail did not extrude, it would hold the fragments apart during resorption and cause nonunion. Extrusion allows the head to maintain contact with the neck remnant throughout healing.
Watson-Jones reported 91% bony union in 35 cases using a lateral approach with direct fracture exposure. Cited by Smith-Petersen as evidence that good visualization produces superior results and justifies the more extensive surgery in selected patients.

Board PearlOmitting the lateral radiograph during femoral neck fracture reduction is the single most common cause of nonunion — both views are mandatory.

Treatment of Fractures of the Neck of the Femur by Internal Fixation.

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Treatment of Fractures of the Neck of the Femur by Internal Fixation

Smith-Petersen·Clin Orthop Relat Res·1967·7 citations·Case series

|

This is Smith-Petersen's landmark 1937 report summarizing his evolving technique for internal fixation of femoral neck fractures. It traces the transition from his original open-reduction approach to closed reduction with lateral nailing under biplanar radiographic control. It addresses union rates, technical principles for nail insertion, and when open reduction remains necessary.

Key Findings

Open reduction and nailing in the 26 cases that followed the original 24 achieved bony union in only 70%, slightly inferior to the original series, although function was most satisfactory.
Old femoral neck nonunion (6–24 months duration) is not hopeless: open reduction and nailing achieved 75% bony union in 12 established nonunion cases, though the mean patient age was 45 years and the authors explicitly warn this operation should not be undertaken in the elderly.
Radiographic union cannot be trusted. Smith-Petersen withdrew nails after apparent X-ray union and found nonunion in multiple cases, including 2 cases at over 1 year postoperatively. Any series with less than 2 years of follow-up is a preliminary report, not end-results — a standard that invalidates most competing implant claims of the era.
Valgus reduction is the biomechanical goal: it transmits weight-bearing loads stably across the fracture site. Varus must be avoided because it is mechanically unstable under load. Rotational malalignment in either direction limits hip motion and is unacceptable.
The lateral radiograph is not optional. Omitting it is described as the most common cause of failed reduction and nonunion. Confirmed independently by discussant Dr. Moore with a case example. The AP view alone cannot confirm rotational alignment of the distal neck fragment.
Nail extrusion during neck resorption is a mechanical feature, not a failure. If the nail did not extrude, it would hold the fragments apart during resorption and cause nonunion. Extrusion allows the head to maintain contact with the neck remnant throughout healing.
Watson-Jones reported 91% bony union in 35 cases using a lateral approach with direct fracture exposure. Cited by Smith-Petersen as evidence that good visualization produces superior results and justifies the more extensive surgery in selected patients.

Board PearlOmitting the lateral radiograph during femoral neck fracture reduction is the single most common cause of nonunion — both views are mandatory.

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