title: Recovery of gait pattern after medial patellofemoral ligament reconstruction for objective patellar instability.
abstract: Gait pattern alterations were previously reported in association with objective patellar instability (OPI). Gait pattern comparison between a series of patients having undergone medial patellofemoral ligament (MPFL) reconstruction and a sample of control subjects. Thirty patients at 6 months postoperatively after MPFL reconstruction and thirty control subjects were enrolled in the study for a clinical and biomechanical assessment including gait analysis at three selected walking rates using the GAITRite(®) system. The mean raw IKDC score was 73 (± 19), and the mean Kujala knee function was 84 (± 17.5). The study of gait did not demonstrate any significant difference between the two groups at a normal and fast walking rate. At a 10 km/h running speed, the single-support phase was significantly shortened by a mean 2.33% (p < 0.05), the swing phase by a mean 2.64% (p < 0.05) and the double-support phase by a mean 3.49% (p < 0.05) on the operated side. MPFL reconstruction reported good midterm functional and clinical results in the management of OPI. At 6 months postoperatively, the patient gait pattern was similar to that observed in healthy subjects at a normal and fast walking speed. However, our study revealed persistent gait abnormalities at a 10 km/h running speed. These gait alterations seemed to be related to the ligament reconstruction in itself due to the higher strain applied on the reconstructed MPFL during running cycle (10 km/h). Level of evidence IV.
authors.affiliation: Department of Orthopaedic Surgery, University Hospital Center of Saint-Etienne, Saint-Étienne, France. olivier.carnesecchi@me.com.|Laboratory of Exercise Physiology (LPE EA 4338), Lyon University, Saint-Étienne, France. olivier.carnesecchi@me.com.
authors.forename: O
authors.initials: O
authors.lastname: Carnesecchi
authors.affiliation: Department of Orthopaedic Surgery, University Hospital Center of Saint-Etienne, Saint-Étienne, France.|Laboratory of Exercise Physiology (LPE EA 4338), Lyon University, Saint-Étienne, France.
authors.forename: R
authors.initials: R
authors.lastname: Philippot
authors.affiliation: Department of Orthopaedic Surgery, University Hospital Center of Saint-Etienne, Saint-Étienne, France.
authors.forename: B
authors.initials: B
authors.lastname: Boyer
authors.affiliation: Department of Orthopaedic Surgery, University Hospital Center of Saint-Etienne, Saint-Étienne, France.
authors.forename: F
authors.initials: F
authors.lastname: Farizon
authors.affiliation: Department of Orthopaedic Surgery, University Hospital Center of Saint-Etienne, Saint-Étienne, France.|Department of Clinical and Exercise Physiology, Sports Medicine, University Hospital Center of Saint-Etienne, 42055, Saint-Étienne, France.
authors.forename: P
authors.initials: P
authors.lastname: Edouard
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology / Q000601:surgery*; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery*; D008023:Ligaments, Articular / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D031222:Patellar Dislocation / Q000503:physiopathology / Q000601:surgery*; D057071:Patellofemoral Joint / Q000503:physiopathology / Q000601:surgery*; D019651:Plastic Surgery Procedures; D020127:Recovery of Function; D012008:Recurrence; D016138:Walking / Q000502:physiology; D055815:Young Adult
keywords: Control group; Gait pattern; MPFL; Objective patellar instability