Charnley's 1972 landmark prospective series reports 4–7 year outcomes of cemented low-friction total hip arthroplasty in 379 primary interventions performed November 1962 to December 1965 at Wrightington. The study asks whether a 22 mm HDPE cup fixed with acrylic cement could reliably relieve pain and restore function with acceptable complication rates. Early complications from the broader 582-hip series are also reported.
Every THA you perform exists because of this paper. In 1962, hip replacement was a graveyard of failed designs — Teflon cups caused catastrophic local tissue reactions, and no prosthesis had demonstrated reproducible success at scale. Charnley's series was the proof of concept: cement fixation of a small-head HDPE cup could deliver 90% excellent outcomes at 7 years with mechanical failure below 2%.
Three findings from this paper should shape how you think about THA today. First, infection can present years after the index procedure. A post-operative ESR above 40 in a patient with a previously normal baseline is strong evidence of chronic periprosthetic infection. Second, socket orientation matters more than head size for dislocation prevention. Charnley's 1.5% dislocation rate with a 22 mm head came from strict neutral anteversion, not a large-diameter articulation. Third, press-fit fixation failed at 6.5% vs. 1.3% for cement. Mechanical fixation principles matter regardless of era.
The wear debris and osteolysis consequences of conventional polyethylene identified in this era directly drove development of highly cross-linked polyethylene and modern alternative bearing surfaces. Making this paper the origin point of that entire research trajectory.
Charnley's 1972 landmark prospective series reports 4–7 year outcomes of cemented low-friction total hip arthroplasty in 379 primary interventions performed November 1962 to December 1965 at Wrightington. The study asks whether a 22 mm HDPE cup fixed with acrylic cement could reliably relieve pain and restore function with acceptable complication rates. Early complications from the broader 582-hip series are also reported.
Every THA you perform exists because of this paper. In 1962, hip replacement was a graveyard of failed designs — Teflon cups caused catastrophic local tissue reactions, and no prosthesis had demonstrated reproducible success at scale. Charnley's series was the proof of concept: cement fixation of a small-head HDPE cup could deliver 90% excellent outcomes at 7 years with mechanical failure below 2%.
Three findings from this paper should shape how you think about THA today. First, infection can present years after the index procedure. A post-operative ESR above 40 in a patient with a previously normal baseline is strong evidence of chronic periprosthetic infection. Second, socket orientation matters more than head size for dislocation prevention. Charnley's 1.5% dislocation rate with a 22 mm head came from strict neutral anteversion, not a large-diameter articulation. Third, press-fit fixation failed at 6.5% vs. 1.3% for cement. Mechanical fixation principles matter regardless of era.
The wear debris and osteolysis consequences of conventional polyethylene identified in this era directly drove development of highly cross-linked polyethylene and modern alternative bearing surfaces. Making this paper the origin point of that entire research trajectory.