I was recently contacted by a company that makes gel insoles after responding to a post here on PA asking if I would like to offer their product in my office. Admin deleted the thread from what I can tell but I offered the owner and his staff to come and convince us that what he claims is true. It makes for interesting reading. The developer is a "Biomechanical Engineer":
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http://www.kendallgelthotics.com/The_Functional_Science_of_the_GelThotic_.pdf
The general points of discussion:
• Orthoses radically alter shoe fit.
• Orthoses have “side effects”, or create their own problems.
• Hard surfaces, such as in a conventional orthosis, irritate the damaged foot and often encourage inflammation.
• Orthoses and conventional insoles either use materials that compact and shift geometries or have contours that are not therapeutic.
• Orthoses don’t adapt to the shoe that is being worn.
• The “planar” surfaces of most insoles are repeated in both the orthotic itself and the shoe taking unnecessarily large amounts of space.
• Conventional orthosis don’t sufficiently absorb shock.
• Most insoles, and few orthoses account for various foot types.
• Conventional insoles and Orthoses are ineffective in controlling multiple planes of movement such as in various sports including tennis, basketball, etc.
• Most Orthoses are generally unstable; being too narrow and high actually decreasing lateral stability.
• Many materials used in Orthoses are irritating, too thin, and compressible.
• Orthoses pick up microbes and odors after a time.
• Conventional Orthoses don’t account for the full “gait-cycle”.
• Conventional Orthoses don’t address all three of the major foot conditions: 1) Plantar Fasciitis, 2) Neuromas and problems of the forefoot, and 3) General Heel Pain.
• Orthoses don’t work with a removable insole.
• Conventional Orthoses don’t control motion as over-pronation throughout the gait cycle.
• Conventional Orthoses don’t distribute pressure over the whole heel and effectively “cup” it.
• Conventional Orthoses don’t work well with the high arched (cavus) foot.
• Conventional Orthoses don’t fit in dress shoes and high heels.
• The longitudinal arch of conventional Orthoses, even custom Orthoses do not reach high enough to fully distribute pressure and fully support the arch.
• The “arch” of conventional orthosis, even custom, lacks a “fasciial groove” to both support the arch and adapt to its contours.
• Conventional Orthoses and insoles do not follow the general geometrical and longitudinal axis of a given shoe.
• Custom Orthoses often employ a technique called “fill” to actually reduce the topography of the support for better tolerance but at that point it is questionable if it is custom, much less therapeutic.
• Conventional Orthoses are so invasive toward the longitudinal mid-line of the shoe that the foot is never in a neutral plane anywhere in the shoe.
The floor is yours Mr. Kendall :hammer:
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