In-vivo patellar tracking in individuals with patellofemoral pain and healthy individuals

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Fateme EsfandiarpourPierre Boulanger

Abstract

Understanding of the exact cause of patellofemoral pain has been limited by methodological challenges to evaluate in-vivo joint motion. This study compared six degree-of-freedom patellar motion during a dynamic lunge task between individuals with patellofemoral pain and healthy individuals. Knee joints of eight females with patellofemoral pain and ten healthy females were imaged using a CT scanner in supine lying position, then by a dual-orthogonal fluoroscope while they performed a lunge. To quantify patellar motion, the three-dimensional models of the knee bones, reconstructed from CT scans, were registered on the fluoroscopy images using the Fluomotion registration software. At full knee extension, the patella was in a significantly laterally tilted (PFP: 11.77° ± 7.58° vs. healthy: 0.86° ± 4.90°; p = 0.002) and superiorly shifted (PFP: 17.49 ± 8.44 mm vs. healthy: 9.47 ± 6.16 mm, p = 0. 033) position in the patellofemoral pain group compared with the healthy group. There were also significant differences between the groups for patellar tilt at 45°, 60°, and 75° of knee flexion, and for superior-inferior shift of the patella at 30° flexion (p ≤ 0.031). In the non-weight-bearing knee extended position, the patella was in a si...Continue Reading

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Citations

Apr 26, 2019·Journal of Healthcare Engineering·Zhenguo YuBin Yang
Jul 1, 2019·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Bettina HochreiterHenrik Behrend
Jan 27, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Florian PohligRuediger von Eisenhart-Rothe

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