This 2000 intraoperative case series from Ganz's group at Berne directly inspected 14 hips in 13 adolescents with SCFE. The study asked whether the prominent anterior femoral metaphysis causes early mechanical damage to the acetabulum before arthrosis develops. It is the foundational paper establishing femoroacetabular impingement as the mechanism of arthrosis in SCFE.
A symptomatic SCFE hip has almost certainly already sustained acetabular cartilage damage — this paper showed injury in hips symptomatic for only weeks, across all severity grades. When you fix an SCFE, trimming the prominent anterolateral metaphysis to restore femoral neck offset is not optional. Leaving it proud perpetuates the impingement mechanism that started the cartilage destruction.
The clinical exam clue is there too: forced external rotation with increasing hip flexion is the physical sign of metaphyseal impingement, and it maps directly to the superomedial cartilage zone being damaged.
This paper also reframes the arthrosis risk in SCFE. The 25–41% long-term arthrosis rate is not purely from AVN or head malposition. It begins with direct chondral abrasion at the time of the slip, which is irreversible once the subchondral plate is spared.
This 2000 intraoperative case series from Ganz's group at Berne directly inspected 14 hips in 13 adolescents with SCFE. The study asked whether the prominent anterior femoral metaphysis causes early mechanical damage to the acetabulum before arthrosis develops. It is the foundational paper establishing femoroacetabular impingement as the mechanism of arthrosis in SCFE.
A symptomatic SCFE hip has almost certainly already sustained acetabular cartilage damage — this paper showed injury in hips symptomatic for only weeks, across all severity grades. When you fix an SCFE, trimming the prominent anterolateral metaphysis to restore femoral neck offset is not optional. Leaving it proud perpetuates the impingement mechanism that started the cartilage destruction.
The clinical exam clue is there too: forced external rotation with increasing hip flexion is the physical sign of metaphyseal impingement, and it maps directly to the superomedial cartilage zone being damaged.
This paper also reframes the arthrosis risk in SCFE. The 25–41% long-term arthrosis rate is not purely from AVN or head malposition. It begins with direct chondral abrasion at the time of the slip, which is irreversible once the subchondral plate is spared.