Charnley's 1964 landmark paper reports systematic human evidence on cold-curing acrylic (PMMA) cement used to fix femoral head prostheses in 455 patients. It directly examines 48 hips at re-exploration or necropsy to answer whether cement fixation is durable and biologically safe. Histology, radiology, and direct re-exploration results are correlated to define what normal post-operative appearances look like.
Every time you see a cemented femoral stem radiograph with calcar resorption and a collar floating above bone, this paper is why you don't panic.
Before Charnley's systematic human data, prior animal work raised unresolved concerns about polymerization heat, monomer toxicity, and whether cement could remain durable against living bone. There was no framework for interpreting the radiographic changes that follow cemented stem insertion.
When you evaluate a cemented stem post-operatively: calcar resorption with up to 1.5 inches of collar overhang is expected and clinically insignificant. Serial medullary canal widening also does not equal loosening — Charnley confirmed both findings were benign at direct re-exploration.
When you prepare a femoral canal for cemented stem insertion: avoid curettage. Rough cancellous bone maximizes mechanical interlock. Canal prep quality determines fixation quality.
The infection data here planted the seed for laminar-flow theatres and antibiotic-loaded cement: a 4.4% rate dropping below 1% with theatre discipline alone proved that environment, not the implant, is the dominant infection variable.
Charnley's 1964 landmark paper reports systematic human evidence on cold-curing acrylic (PMMA) cement used to fix femoral head prostheses in 455 patients. It directly examines 48 hips at re-exploration or necropsy to answer whether cement fixation is durable and biologically safe. Histology, radiology, and direct re-exploration results are correlated to define what normal post-operative appearances look like.
Every time you see a cemented femoral stem radiograph with calcar resorption and a collar floating above bone, this paper is why you don't panic.
Before Charnley's systematic human data, prior animal work raised unresolved concerns about polymerization heat, monomer toxicity, and whether cement could remain durable against living bone. There was no framework for interpreting the radiographic changes that follow cemented stem insertion.
When you evaluate a cemented stem post-operatively: calcar resorption with up to 1.5 inches of collar overhang is expected and clinically insignificant. Serial medullary canal widening also does not equal loosening — Charnley confirmed both findings were benign at direct re-exploration.
When you prepare a femoral canal for cemented stem insertion: avoid curettage. Rough cancellous bone maximizes mechanical interlock. Canal prep quality determines fixation quality.
The infection data here planted the seed for laminar-flow theatres and antibiotic-loaded cement: a 4.4% rate dropping below 1% with theatre discipline alone proved that environment, not the implant, is the dominant infection variable.