Skip to main content

Table 2 Orthema Orthowin® Software Addition Protocol and Orthotic Fitting Modifications

From: A single-blinded, randomized, parallel group superiority trial investigating the effects of footwear and custom foot orthoses versus footwear alone in individuals with patellofemoral joint osteoarthritis: a phase II pilot trial protocol

CAD software adjustments

 

Addition type

Description

1.

Heel cup contour

â–ª Width of horseshoe shape adjusted to create smooth heel contour

2.

Medial rearfoot skive

â–ª Height dependant on degree of pronation as rated by the FPI:

 Mild: 140% (height approx. 23 mm; FPI: 0–4),

 Moderate: 170% (height approx. 28 mm; FPI: 5–8),

 Severe: 200% (height approx. 33 mm; FPI: 9+)

â–ª No medial skive will be added to a supinated foot type

3.

Cuboid pad

▪ 50% height (approx. 10 mm)

▪ 150% of original addition length added to region of cuboid (approx. 122 mm)

4.

Metatarsal dome

▪ Standard shape at 90% height (approx. 5 mm) and width adjusted to leave approx. 1.5 cm either side of block

â–ª Length adjusted to extend from proximal metatarsal heads to base of metatarsals

5.

Rearfoot-midfoot supination/pronation wedge

â–ª Height adjusted dependent on degree of pronation or supination as rated by the FPI

 Mild: 140% (height approx. 13 mm; FPI: 0–4),

 Moderate: 170% (height approx. 17 mm; FPI: 5–8),

 Severe: 200% (height approx. 20 mm; FPI: 9+)

â–ª Length adjusted to finish just proximal to 1st metatarsal head

6.

Plantar fascia groove

▪ 2 mm depth

â–ª Length adjusted to span medial longitudinal arch along approx. line of plantar fascia and the FHL tendon

  1. Abbreviations: CAD computer assisted design, approx. approximately, cm centimeters, FHL flexor hallucis longus, mm millimeters, FPI Foot Posture Index. Height in mm from zero point of milling plate to the top of the adjustment