Moritz Wagner, Jeroen Verhaegen, Camille Vorimore, Moritz Innmann, Ottawa Arthroplasty Group, George Grammatopoulos
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引用次数: 0
Abstract
Aims
Spinopelvic characteristics change after THA. Whether this change varies between approaches, is of interest for pre-op cup orientation planning. The aims of this study were to (1) Characterize changes in standing PT amongst patients with hip osteoarthritis treated with THA; (2) Test whether certain patient-related factors may predict PT change; and (3) Assess the association between surgical approach and PT change.
Methods
This was a prospective, two-center, radiographic outcome study including 424 hips, consisting of anterior approach for 171 (40.3%) hips, lateral approach for 181 hips (42.7%) and posterior approach for 72 hips (17.0%). Spinopelvic characteristics were determined from lateral radiographs (before and one year after THA). Parameters of interest included: Pelvic tilt (PT), lumbar lordosis, sacral slope, pelvic incidence. PT change of more than 7 ° was considered clinically relevant.
Results
Pelvic tilt increased by 2 ° from 15.1 ° (± 8.9) to 17.1 ° (± 9.7) after THA (p < 0.001). 19 hips (4.5%) experienced a relevant PT decrease, 337 (79.5%) had no clinically significant change in pelvic tilt, and 68 (16.0%) showed a moderate increase. Age, female sex and preoperative spinopelvic parameters including PT, SS and PI were predictive of PT change more than 7 °. PT increased most with lateral approach (2.9 ± 6.2) and least with anterior approach (1.1 ± 6.2, p = 0.024).
Conclusion
Preoperative PT is the best predictor for PT change. PT is generally normalizing after THA and patients with low PT due to hip flexion contractures tend to increase PT after THA, few patients with high PT will decrease after THA. Anterior approach with capsulectomy was associated with the least change in PT post-THA. However, the approach-specific changes, although statistically significant, were too small to be considered during clinical practice, therefore no approach-specific prediction of PT change needs to be considered during preoperative planning for primary THA.
期刊介绍：
"Archives of Orthopaedic and Trauma Surgery" is a rich source of instruction and information for physicians in clinical practice and research in the extensive field of orthopaedics and traumatology. The journal publishes papers that deal with diseases and injuries of the musculoskeletal system from all fields and aspects of medicine. The journal is particularly interested in papers that satisfy the information needs of orthopaedic clinicians and practitioners. The journal places special emphasis on clinical relevance.
"Archives of Orthopaedic and Trauma Surgery" is the official journal of the German Speaking Arthroscopy Association (AGA).
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