STJ Axis Method (Recommended)
This method is only possible when using colour 3D scan formats such as VRML.
The image below shows the orientation of the adjustment relative to the subtalar joint axis marked on the 3D scan (represented by the yellow line).
Using the STJ Axis Method the only variable required is the Skive Depth.
Skive Angle is not required as the orientation of the skive plane is based upon the marked subtalar joint axis.
depth/ degree method
The Depth/Degree Method allows a user to enter a specific Skive Depth and Skive Angle.
Skive Depth:
The Skive Depth directly effects the magnitude of supination or pronation moment applied to the subtalar joint.
The Skive Angle defines the frontal plane orientation of the skive plane. If the subtalar join axis is medially deviated then the Skive Angle should increase to ensure a supination moment is being applied to the subtalar joint.
The Skive Angle does not need to be specified when using the STJ Axis Method.
The Inclination Angle defines the sagittal plane orientation of the skive plane. The default value is set to Maximum Inclination, which is considered generally appropriate. Specific values may be requested.
The Skive Angle does not need to be specified when using the STJ Axis Method.
The image below shows a Skive with the Maximum Inclination of the skive plane.
