It was this design, a functional orthotic device for supinators, that initially drew me into Kevin’s Orthotic Lab (now KevinRoot Medical). Let’s look at the schemata.
What are the crucial elements that will help someone with lateral ankle instability in the P3 Design? These are:
- Rearfoot Post has no motion and is cut oblique for more surface area laterally
- Deep Heel Cup has both lateral and medial flanges of medium height standard size
- Custom Mold to Balance FF to RF deformities (when there are Everted Deformities this really helps this problem of lateral instability)
- No frame fill (both medial and lateral) to possibly push on the shoe medial arch and supinate the foot
There are the common modifications used with this problem most prescribed. They include:
- Selectively raising the lateral heel cup to 21 mm, and lowering the medial heel cup to 15 mm
- Asking for a 4.5 mm arch fill, standard arch width, and removing the medial flange
- Adding a lateral frame fill and valgus onlay to sulcus
- In severe cases, using many of the above along with lateral heel skive 4 mm and 1/8 inch full length valgus wedge applied after the orthotic is made completely
- In athletes, that are up on the ball of the foot a lot, request 4th and 5th 1/8 inch forefoot extension sulcus length on top of the myolite
