Abstract
Medial patellar instability is a serious well-known complication following extensor mechanism realignment surgery.
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Notes
- 1.
A point of interest in gait analysis is the cadence used. The cadence has an important effect on the gait parameters.1,16 Many authors use a spontaneous cadence in their studies. Nevertheless, when a subject is in pain, his cadence is slower than normal to make his gait more comfortable. In the present study, the subject was required to walk at the same cadence before and after the surgery. In this case, we have chosen a high frequency (140 steps/min) because the faster the subject walks, the more evident the functional impairment becomes.
- 2.
Preoperative left (healthy limb) vertical heel contact peak force (1.28), toe-off peak force (1.04), and horizontal braking force (0.29) are lower than the postoperative left (healthy limb) vertical heel contact peak force (1.40), toe-off peak force (1.27), and horizontal braking force (0.34) due to a phenomenon of functional compensation, as we can see in other pathologies.22 We hypothesize that after surgery, due to the consequent recovery of the absorption mechanism in the affected knee, a redistribution of the loads between the two extremities takes place with the gait becoming more symmetrical and both extremities show gait patterns within normal limits.
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Sanchis-Alfonso, V., Montesinos-Berry, E., Castelli, A., Marín-Roca, S., Cortes, A. (2011). Kinetic and Kinematic Analysis of Iatrogenic Medial Patellar Instability: Clinical Relevance. In: Sanchis-Alfonso, V. (eds) Anterior Knee Pain and Patellar Instability. Springer, London. https://doi.org/10.1007/978-0-85729-507-1_26
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DOI: https://doi.org/10.1007/978-0-85729-507-1_26
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