The Influence of Orthotic Forefoot Lifts on Plantar Foot Pressures during Double Limb Stance
Dunn, Keven P.
MetadataShow full item record
Background: The aim of this study was to evaluate the effects of position and height of orthotic forefoot lifts on plantar pressures during double limb stance. Methods: Barefoot quasi-static stance pressure measurements were taken during double limb stance (n=22). Four forefoot lift (i.e. metatarsal head (MTH) and corresponding phalanges) conditions at three heights (4, 8, 12 mm) elevated the forefoot. A barefoot condition with no forefoot lift served as the control. Maximum mean pressure was measured for each test condition. All findings are compared to the no forefoot lift condition. Findings: The 1st MTH forefoot lift increased pressure at the 1st MTH while the 3rd-5th MTH forefoot lift decreased pressure at the 1st MTH. The 1st-2nd MTH forefoot lift resulted in no change in pressure at the 1st MTH, but the 2nd MTH forefoot lift increased pressure at the 2nd MTH. The 1st MTH forefoot lift decreased pressure at 3rd- 5th MTHs and the 3rd-5th MTH forefoot lift increased pressure at the 3rd- 5th MTHs. Interpretation: Orthotic forefoot lifts can be used to redistribute plantar pressures in the foot during double limb stance. The results of this study will be helpful in predicting lift height and position necessary to offload particular areas. Clinical Relevance: This research provides evidence-based practices in orthotic forefoot lifts. Clinicians can use the included table to predict plantar pressure reductions to certain areas of the foot. By using the table a percent decrease in pressure can be calculated based on a 25 subject population.