The study authors gathered data from the Norwegian Arthroplasty Register that included 21,860 total hip arthroplasties with an uncemented stem. There were 2,017 surgeries through the minimally invasive anterior approach; 2,087 through the minimally invasive anterolateral approach; 5,961 through the posterior approach and 11,795 through the direct lateral approach.
All the procedures were preformed from 2008 to 2013. The study authors found:
1. There wasn’t a significant difference between approach in the two- and five-year survival rates. The relative risk of revision rates were also similar between the groups.
2. For the minimally invasive approaches, the relative risk of revision after infection was 0.53, compared to 0.57 for the posterior approach compared to the direct lateral.
3. For the posterior approach compared to the direct lateral approach, the relative risk of revision due to dislocation was 2.1. There wasn’t a significant risk difference when comparing the minimally invasive approaches to the direct lateral approach.
4. The study authors concluded, “The revision rates and risk of revision associated with the MIS anterior and anterolateral approaches were not increased compared with those of the conventional posterior and direct lateral approaches.”
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