This 1973 historical article describes the conception and design of the geometric total knee arthroplasty. It lays out the rationale for a nonhinged metal-to-polyethylene bicondylar design, its indications and contraindications, and a step-by-step surgical technique. The authors report less than two years of clinical experience with the system.
This paper documents an early step in the evolution from rigid hinged knees toward the modern resurfacing arthroplasty every resident implants today. The core insight is biomechanical: a rigid hinge cannot rotate, so it funnels stress into the components and fails by loosening, fracture, and infection. The nonhinged bicondylar design with a 2 mm size mismatch restores rotational freedom.
The indication logic remains testable and clinically live. Bicompartmental disease points toward arthroplasty, while unicompartmental degenerative arthritis points toward upper tibial osteotomy. Note the recurring polyethylene wear theme. The authors already warned that retained debris wears the poly, foreshadowing the osteolysis and wear failures that would dominate TKA research for decades.
Read this as the conceptual bridge between the hinge era and the condylar knees that followed.
This 1973 historical article describes the conception and design of the geometric total knee arthroplasty. It lays out the rationale for a nonhinged metal-to-polyethylene bicondylar design, its indications and contraindications, and a step-by-step surgical technique. The authors report less than two years of clinical experience with the system.
This paper documents an early step in the evolution from rigid hinged knees toward the modern resurfacing arthroplasty every resident implants today. The core insight is biomechanical: a rigid hinge cannot rotate, so it funnels stress into the components and fails by loosening, fracture, and infection. The nonhinged bicondylar design with a 2 mm size mismatch restores rotational freedom.
The indication logic remains testable and clinically live. Bicompartmental disease points toward arthroplasty, while unicompartmental degenerative arthritis points toward upper tibial osteotomy. Note the recurring polyethylene wear theme. The authors already warned that retained debris wears the poly, foreshadowing the osteolysis and wear failures that would dominate TKA research for decades.
Read this as the conceptual bridge between the hinge era and the condylar knees that followed.