Garden's 1961 paper introduces a four-stage radiographic classification of subcapital femoral neck fractures based on degree of displacement before reduction. It evaluates low-angle nail fixation aligned with the compressive trabecular axis as a means of enabling early weight-bearing. The central question is whether reduction quality, quantified by the alignment index, determines union and avascular necrosis rates independently of the fixation device used.
The Garden classification gave the orthopedic world a shared language for femoral neck fractures that is still in daily use. Before this paper, displacement was described vaguely, and outcome data were pooled across fracture types in ways that obscured which patients actually failed.
When you reduce a displaced subcapital fracture, check the alignment index on both views before inserting any hardware. Index below 155 means you have not reduced it well enough. Index above 180 on AP means you have over-reduced into valgus — and this paper shows that outcome is uniformly catastrophic for the femoral head.
The practical decision rule that flows directly from this work: Stages I and II can be pinned with confidence (100% union). Stage III reduces readily if the posterior retinaculum is intact and you act early. Stage IV is where outcomes diverge. A well-reduced Stage IV can still unite, but a poorly reduced one will not, and extreme valgus will reliably kill the head.
This paper is why modern trauma teaching emphasizes that arthroplasty should be considered in elderly patients with Stage III/IV fractures: the biology of a fully displaced subcapital fracture in osteoporotic bone makes reliable union and head survival genuinely difficult, regardless of implant.
Garden's 1961 paper introduces a four-stage radiographic classification of subcapital femoral neck fractures based on degree of displacement before reduction. It evaluates low-angle nail fixation aligned with the compressive trabecular axis as a means of enabling early weight-bearing. The central question is whether reduction quality, quantified by the alignment index, determines union and avascular necrosis rates independently of the fixation device used.
The Garden classification gave the orthopedic world a shared language for femoral neck fractures that is still in daily use. Before this paper, displacement was described vaguely, and outcome data were pooled across fracture types in ways that obscured which patients actually failed.
When you reduce a displaced subcapital fracture, check the alignment index on both views before inserting any hardware. Index below 155 means you have not reduced it well enough. Index above 180 on AP means you have over-reduced into valgus — and this paper shows that outcome is uniformly catastrophic for the femoral head.
The practical decision rule that flows directly from this work: Stages I and II can be pinned with confidence (100% union). Stage III reduces readily if the posterior retinaculum is intact and you act early. Stage IV is where outcomes diverge. A well-reduced Stage IV can still unite, but a poorly reduced one will not, and extreme valgus will reliably kill the head.
This paper is why modern trauma teaching emphasizes that arthroplasty should be considered in elderly patients with Stage III/IV fractures: the biology of a fully displaced subcapital fracture in osteoporotic bone makes reliable union and head survival genuinely difficult, regardless of implant.