Low dislocation rates with the use of patient specific "Safe zones" in total hip arthroplasty.
retrospective_cohort · Level III
Where this comes from
- Record sourced from PubMed, PMID 34483549.
- Also identified by DOI 10.1016/j.jor.2021.08.009 and PMC identifier 8397909.
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Abstract
The purpose of this study was to compare patient-specific acetabular cup target orientation using functional simulation to the Lewinnek Safe Zone (LSZ) and determine associated rates of postoperative dislocation. A retrospective review of 1500 consecutive primary THAs was performed. Inclination, anteversion, pelvic tilt, pelvic incidence, lumbar flexion, and dislocation rates were recorded. 56% of dynamically planned cups were within LSZ (p < 0.05). 6/1500 (0.4%) of these cups dislocated at two year follow-up, and all were within LSZ. Optimal acetabular cup positioning using dynamic imaging differs significantly from historical target parameters but results in low rates of dislocation. Level III: Retrospective.
Anatomy
- hip