Influence of leg length inequalities on pelvis and spine in patients with total hip arthroplasty
Betsch M, Michalik R, Graber M, Wild M, Krauspe R, Zilkens C (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 14
Article Number: e0221695
Journal Issue: 8
DOI: 10.1371/journal.pone.0221695
Abstract
Background Leg length inequalities (LLIs) are a common finding in patients with a total hip arthroplasty (THA). Therefore, we compared the effects of simulated LLIs in patients with total hip arthroplasty (THA) with a matched control group. Research question Do LLIs lead to different effects on the musculoskeletal apparatus of patients with a THA then in a control group? Methods In 99 patients with a THA the effects of simulated LLIs were compared to a matched control group of 101 subjects without a hip arthroplasty. First, we compared methods for LLI quantification (tape measurements, pelvic x- ray and rasterstereography). Second, the effects of simulated LLIs on the spine and pelvis were evaluated in both groups using surface topography. LLIs of 5, 10, 15, 20 and 30 mm were simulated on both sides with a simulation platform. The changes of pelvic position (pelvic obliquity & pelvic torsion) and the effects on spinal posture (surface rotation & lateral deviation) were measured and analysed using a surface topography system. Results Mean LLI measured with a tape was 0.9 mm (SD +/- 14.8). Mean pelvic obliquity measured on x-rays was 1.2 mm (SD +/- 11.6) and with surface topography 0.9 mm (SD +/- 7.9). Simulated LLIs resulted in significant changes of pelvic position and spinal posture in the patient and control group. Interestingly, our study showed that simulated LLIs lead to greater changes in pelvic position (p<0.05) in patients with a THA. Significance This is the first study to demonstrate that LLIs might have a greater impact on the pelvic position of THA patients than in native hips, which could indicate that LLIs do need to be compensated differently in patients with THA than in patients without a THA.
Authors with CRIS profile
Involved external institutions
Universitätsklinikum Aachen (UKA)
Germany (DE)
Universitätsklinikum Düsseldorf
Germany (DE)
Klinikum Darmstadt
Germany (DE)
Germany (DE)
Universitätsklinikum Düsseldorf
Germany (DE)
Klinikum Darmstadt
Germany (DE)
How to cite
APA:
Betsch, M., Michalik, R., Graber, M., Wild, M., Krauspe, R., & Zilkens, C. (2019). Influence of leg length inequalities on pelvis and spine in patients with total hip arthroplasty. PLoS ONE, 14(8). https://doi.org/10.1371/journal.pone.0221695
MLA:
Betsch, Marcel, et al. "Influence of leg length inequalities on pelvis and spine in patients with total hip arthroplasty." PLoS ONE 14.8 (2019).
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