HETEROTOPIC OSSIFICATION IN TOTAL HIP-ARTHROPLASTY - THE INFLUENCE OFTHE APPROACH

The effects of lateral approaches for total hip arthroplasty on hetero topic bone formation were studied in 264 patients with primary osteoar thritis. The Hardinge approach was used in 82 patients, the transtroch anteric approach in 94, and the Liverpool approach in 88. The incidenc e of heterotopic ossification was 42%. A severe form of bone formation occurred five times more in the Liverpool approach than in other two approaches.