Extrinsic Forefoot Posting
This method of forefoot posting is accomplished by placing crepe directly under the front of the orthoses, wedging the forefoot into its neutral or desired position. This type of posting may not allow the metatarsal heads to reach the supporting surface and could induce jamming at the metatarsophalangeal joints. This type of posting also adds considerable bulk to the front of the orthoses, sometimes causing shoe fit problems.
Intrinsic Forefoot Posting
Intrinsic posting into the cast allows the metatarsals to plantarflex to the supporting surface, decreasing jamming of the metatarsophalangeal joints and preventing the forefoot post from affecting the place of the rearfoot.
Triaxial Intrinsic Forefoot Posting
This technique allows the posting of the forefoot to be integrated directly into the plaster cast of the foot. By sectioning the midtarsal joints to their oblique axis, the forefoot can be rotated out of a varus or valgus position. This allows full posting of large degrees of deformity. Triaxial posting is often completed by incorporating a biaxial rearfoot post.
An extrinsic forefoot post is added under the metatarsal heads, tapering off distally and becoming incorporated into a forefoot extension. The post is used in place of the intrinsic forefoot post. This posting is most useful when controlling forefoot varus or valgus in sports where heel contact is short or there are large amounts of side-to-side motion in the activity.
A runner’s wedge is incorporated in the same manner as the extrinsic long except with 3° of varus in addition to the forefoot intrinsic posting.