Buckwalter, Saltzman, and Brown review the epidemiology, joint distribution, risk factors, natural history, and economic costs of OA. The central question: why is OA so common in some joints and almost nonexistent as a primary disease in others? The paper identifies critical gaps in research and frames OA biology — particularly chondrocyte senescence — as the key to prevention.
The ankle is the prototypical example of a joint that resists primary OA but is devastated by posttraumatic OA. When a patient presents with ankle arthritis, treat it as posttraumatic until proven otherwise — 73% of cases in this series had a traumatic etiology, versus only 13% for the knee.
When you see a 55-year-old with a tibial plateau or intra-articular ankle fracture, the age matters as much as the fracture pattern. Patients over 50 carry a two- to fourfold greater OA risk after intra-articular knee fractures than younger patients. Anatomic reduction is not just about alignment, it is about protecting a biologically compromised cartilage environment.
The natural history data should inform counseling: OA does not inevitably worsen. One-third to two-thirds of patients show no radiographic progression over a decade, and 10% of knee OA patients actually improved. Framing OA as relentlessly progressive is inaccurate and may drive premature surgical decision-making.
The underlying biology explains why cartilage repair remains so difficult. Chondrocytes cannot be replenished, have no vascular supply, and lose their anabolic capacity with age. Any intervention that preserves existing cartilage. Correcting malalignment, stabilizing the joint, reducing posttraumatic incongruity. Is working with a finite and irreplaceable resource.
Buckwalter, Saltzman, and Brown review the epidemiology, joint distribution, risk factors, natural history, and economic costs of OA. The central question: why is OA so common in some joints and almost nonexistent as a primary disease in others? The paper identifies critical gaps in research and frames OA biology — particularly chondrocyte senescence — as the key to prevention.
The ankle is the prototypical example of a joint that resists primary OA but is devastated by posttraumatic OA. When a patient presents with ankle arthritis, treat it as posttraumatic until proven otherwise — 73% of cases in this series had a traumatic etiology, versus only 13% for the knee.
When you see a 55-year-old with a tibial plateau or intra-articular ankle fracture, the age matters as much as the fracture pattern. Patients over 50 carry a two- to fourfold greater OA risk after intra-articular knee fractures than younger patients. Anatomic reduction is not just about alignment, it is about protecting a biologically compromised cartilage environment.
The natural history data should inform counseling: OA does not inevitably worsen. One-third to two-thirds of patients show no radiographic progression over a decade, and 10% of knee OA patients actually improved. Framing OA as relentlessly progressive is inaccurate and may drive premature surgical decision-making.
The underlying biology explains why cartilage repair remains so difficult. Chondrocytes cannot be replenished, have no vascular supply, and lose their anabolic capacity with age. Any intervention that preserves existing cartilage. Correcting malalignment, stabilizing the joint, reducing posttraumatic incongruity. Is working with a finite and irreplaceable resource.