Malchau et al. report outcomes from all 92,675 primary THR performed in Sweden between 1978 and 1990, captured prospectively through the Swedish National THR Registry. Using Kaplan-Meier survival analysis and Poisson regression, the study examines revision rates by failure mode, patient demographics, implant type, and surgical environment. The central question: what drives THR failure at the population level, and can systematic tracking improve it?
Every orthopedic resident should know the revision failure mode hierarchy from this paper: aseptic loosening (79%), infection (10%), technical error (6%), dislocation (2%). These numbers set the benchmark for what you are trying to prevent when you optimize a cementation technique or choose an implant.
When a patient under 55 asks about total hip replacement, this paper is the historical foundation for the caution you should express. The authors found unacceptable failure rates in this age group with both cemented and cementless fixation, and labeled the procedure experimental — a position that drove subsequent development of alternative bearings and resurfacing.
On the technique side: vacuum mixing, femoral plugging, and acetabular pressurization were not optional refinements. Each was an independent predictor of revision risk in 92,675 hips. Third-generation cementing technique exists because of data like these.
The broader lesson is institutional: the Swedish registry cut Sweden's national revision burden by roughly 2.5 times over two decades by feeding outcome data back to surgeons. This paper is why national arthroplasty registries now exist in Australia, England, Canada, New Zealand, and elsewhere. And why registry participation is considered a professional obligation, not an academic exercise.
Malchau et al. report outcomes from all 92,675 primary THR performed in Sweden between 1978 and 1990, captured prospectively through the Swedish National THR Registry. Using Kaplan-Meier survival analysis and Poisson regression, the study examines revision rates by failure mode, patient demographics, implant type, and surgical environment. The central question: what drives THR failure at the population level, and can systematic tracking improve it?
Every orthopedic resident should know the revision failure mode hierarchy from this paper: aseptic loosening (79%), infection (10%), technical error (6%), dislocation (2%). These numbers set the benchmark for what you are trying to prevent when you optimize a cementation technique or choose an implant.
When a patient under 55 asks about total hip replacement, this paper is the historical foundation for the caution you should express. The authors found unacceptable failure rates in this age group with both cemented and cementless fixation, and labeled the procedure experimental — a position that drove subsequent development of alternative bearings and resurfacing.
On the technique side: vacuum mixing, femoral plugging, and acetabular pressurization were not optional refinements. Each was an independent predictor of revision risk in 92,675 hips. Third-generation cementing technique exists because of data like these.
The broader lesson is institutional: the Swedish registry cut Sweden's national revision burden by roughly 2.5 times over two decades by feeding outcome data back to surgeons. This paper is why national arthroplasty registries now exist in Australia, England, Canada, New Zealand, and elsewhere. And why registry participation is considered a professional obligation, not an academic exercise.