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Effectiveness of various materials in reducing plantar shear forces. A pilot study
1Sandy Hill Community Health Centre, Ottawa, Ontario, Canada.
Journal of the American Podiatric Medical Association
|August 10, 2000
Summary
New gel materials significantly reduce plantar shear forces, unlike conventional foams. This finding suggests gel insoles could be beneficial for reducing foot ulcers in individuals with diabetes mellitus.
Area of Science:
- Biomechanics
- Materials Science
- Podiatry
Background:
- Vertical plantar forces contribute to foot pathology.
- Shear forces are implicated in diabetic foot ulcer development.
- Insoles aim to reduce foot forces, but shear force reduction is less studied.
Purpose of the Study:
- To assess the effectiveness of different insole materials in reducing plantar shear forces.
- To compare the shear force reduction capabilities of novel gel materials against conventional foam materials.
Main Methods:
- Five materials (two gels, three foams) were tested.
- Four subjects walked over a force platform with materials applied.
- Peak force, impulse, and resultant shear force were analyzed.
Main Results:
- Gel materials demonstrated significantly greater reduction in shear forces compared to foam materials.
- Specific data on peak force and impulse reduction were analyzed.
Conclusions:
- Gel materials show promise for reducing plantar shear forces.
- Gel insoles may be indicated for mitigating shear forces in diabetic feet, potentially aiding in ulcer prevention.