Effectiveness of diabetic insoles to reduce foot pressures

J Foot Ankle Surg. Jul-Aug 1997;36(4):268-71; discussion 328-9. doi: 10.1016/s1067-2516(97)80071-3.


The F-Scan system was used to measure peak plantar pressures in 11 diabetics each with a unilateral great toe amputation and an intact contralateral extremity (nonamputated), to evaluate the effectiveness of five footwear-insole strategies: 1) extra-depth shoes without an insole, 2) extra-depth shoes with a Plastizote insole, 3) extra-depth shoes with a Plastizote insole and a metatarsal pad, 4) extra-depth shoes with a Plastizote insole and a medial longitudinal arch pad, and 5) extra-depth shoes with a Plastizote insole and a combination of metatarsal pad and arch pad. When we compared extra-depth shoes with and without insoles, peak pressures were significantly reduced with insoles under the first metatarsal, the lesser metatarsals, and the heel (p < 0.001) in feet with and without an amputation, as well as under the great toe on the contralateral foot (nonamputated, p < 0.001), but not under the lesser toes (giant toe, p = 0.088; nonamputated, p = 0.763). There was no significant difference between the different insole modifications.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Aged
  • Amputation*
  • Diabetes Complications
  • Diabetes Mellitus / physiopathology*
  • Diabetic Foot / prevention & control*
  • Diabetic Neuropathies / physiopathology
  • Evaluation Studies as Topic
  • Female
  • Foot / physiopathology*
  • Hallux / surgery
  • Humans
  • Male
  • Middle Aged
  • Orthotic Devices / standards*
  • Pressure
  • Shoes