Orthotic insole

Abstract

The present disclosure provides an orthotic insole 1 comprising a cupped heel plate 2 with an extension portion 3 extending forward of the heel plate 2 and terminating in the region of the talonavicular junction on the plantar aspect of the foot, the extension portion is cut away at both a lateral portion 4 and medial portion 5 so that the extension portion forms a central band. The insole supports and facilitates motion and alignment of the arches of the foot by the application of a dorsiflexory force, a force applied in an upward direction, to a defined central area whilst facilitating medial and lateral movement of the foot by only primarily supporting the central portion of the calcaneum (heel bone) and plantar aponeurosis (plantar fascia) from its origin at the calcaneum tuberosity.

1 . An orthotic insole comprising a cupped heel plate with an extension portion extending forward of the heel plate and terminating in a region of a talonavicular junction on a plantar aspect of a foot, the extension portion being cut away in both a lateral portion and a medial portion so that the extension portion forms a central spur. 
     
     
         2 . The insole as claimed in  claim 1 , wherein the medial portion is more extensively cut away than the lateral portion. 
     
     
         3 . The insole as claimed in  claim 1 , formed from polypropylene. 
     
     
         4 . The insole as claimed in  claim 1 , comprising a single homogenous structure. 
     
     
         5 . The insole as claimed in  claim 1 , comprising copper in the composition of the insole. 
     
     
         6 . The insole as claimed in  claim 1 , comprising a semi-rigid material. 
     
     
         7 . The insole as claimed in  claim 1 , wherein the distal end of the extension portion curves downwards such that the extension portion forms an arch with a void below the arch, to permit the extension portion to flex when inserted in a shoe and weight is applied to its upper surface. 
     
     
         8 . The insole as claimed in  claim 1 , wherein 80% of the area of the insole has a thickness of between 3 mm and 5 mm. 
     
     
         9 . The insole as claimed in  claim 1 , wherein a central portion in the length direction of the extension portion is between 40% and 60% of the maximum width of the insole. 
     
     
         10 . The insole as claimed in  claim 1 , wherein the medial portion is cut away by more than 25% but less than 40% of a maximum width of the insole. 
     
     
         11 . The insole as claimed in  claim 1 , wherein the lateral portion is cut away by more than 15% but less than 30% of a maximum width of the insole. 
     
     
         12 . The insole as claimed in  claim 1 , having a length of between 100 mm and 150 mm. 
     
     
         13 . The insole as claimed in  claim 1 , arranged to be inserted into a shoe and retained in place by an external shape of a heel portion of the insole engaging with sides of the shoe in the region of the heel of the shoe. 
     
     
         14 . A shoe with the orthotic insole as claimed in  claim 12 , fabricated as an integral part of the construction of the shoe.