Orthotic lab FR-EVA-12mm-45A-WHI-SL: FR-EVA-30A: FR-EVA-30A-BLK: FR-EVA-30A-WHI: FR-EVA-35A-TL : FR-EVA-3mm-65A-WHI: FR-EVA-3p0-75A-WHI: FR-EVA-45A-BLK: FR-EVA-45A-WHI: FR-EVA-65A: FR-EVA-65A-BLK: FR-EVA-65A-WHI:

- MATERIALS - FRAME OPTIONS -

EVA

Frame Fabrication Method Accepted:
Plaster positive model vacuum formed

CAD CAM positive model vacuum formed
Redimold positive model vacuum formed
Direct mill frame

Features:
Low to high compression set (depending on rigidity)
Excellent shock absorption
Viscoelastic properties

Clinical Indications:
Sedentary to active patients

 

Orthotic Lab Codes:
FR-EVA-12mm-45A-WHI-SL: 12mm 45 Shore A White EVA Frame to Sulcus
FR-EVA-30A: 30 Shore A EVA Frame
FR-EVA-30A-BLK: 30 Shore A EVA Black Frame
FR-EVA-30A-WHI: 30 Shore A EVA White Frame
FR-EVA-35A-TL: 35 Shore A EVA Frame to Toes
FR-EVA-3mm-65A-WHI: 3mm 65 Shore A White EVA Frame
FR-EVA-3p0-75A-WHI: 75 Shore A 3mm EVA White Frame
FR-EVA-45A-BLK: 45 Shore A EVA Black Frame
FR-EVA-45A-WHI: 45 Shore A EVA White Frame
FR-EVA-65A: 65 Shore A EVA Frame
FR-EVA-65A-BLK: 65 Shore A EVA Black Frame
FR-EVA-65A-WHI: 65 Shore A EVA White Frame

 

ABOUT
EVA, or ethyl vinyl acetate, is a closed-cell foam material used for orthotic frames and frame filler. It makes up the foundation of the heel cup, the material that extends distally to proximal of the metatarsal heads and the inferior arch frame support. This material comes in a variety of durometers or hardnesses based on Albert Ferdinand’s Shore A scale. The prescribing process is simplified based on rigidity scale:

• Myolite is flexible
• 30 EVA is semi-flexible
• 45 EVA is semi-rigid
• 65 EVA is rigid

For EVA vacuum formed frames, a 3-5mm thick EVA frame is thermo-molded to the positive model. Frame filler is then added to provide reinforcement. For direct mill EVA lab processes, subtractive manufacturing is used to mill out the contour of the orthotic frame directly from the block of selected EVA material.

Note: For flexible EVA rigidities (15 Shore A), Myolite material is used as frame filler.

The Clinical Guide topics:

- MATERIALS - FRAME OPTIONS -

EVA

Orthotic lab FR-EVA-12mm-45A-WHI-SL: FR-EVA-30A: FR-EVA-30A-BLK: FR-EVA-30A-WHI: FR-EVA-35A-TL : FR-EVA-3mm-65A-WHI: FR-EVA-3p0-75A-WHI: FR-EVA-45A-BLK: FR-EVA-45A-WHI: FR-EVA-65A: FR-EVA-65A-BLK: FR-EVA-65A-WHI:

Frame Fabrication Method Accepted:
Plaster positive model vacuum formed

CAD CAM positive model vacuum formed
Redimold positive model vacuum formed
Direct mill frame

Features:
Low to high compression set (depending on rigidity)
Excellent shock absorption
Viscoelastic properties

Clinical Indications:
Sedentary to active patients

 

Orthotic Lab Codes:
FR-EVA-12mm-45A-WHI-SL: 12mm 45 Shore A White EVA Frame to Sulcus
FR-EVA-30A: 30 Shore A EVA Frame
FR-EVA-30A-BLK: 30 Shore A EVA Black Frame
FR-EVA-30A-WHI: 30 Shore A EVA White Frame
FR-EVA-35A-TL: 35 Shore A EVA Frame to Toes
FR-EVA-3mm-65A-WHI: 3mm 65 Shore A White EVA Frame
FR-EVA-3p0-75A-WHI: 75 Shore A 3mm EVA White Frame
FR-EVA-45A-BLK: 45 Shore A EVA Black Frame
FR-EVA-45A-WHI: 45 Shore A EVA White Frame
FR-EVA-65A: 65 Shore A EVA Frame
FR-EVA-65A-BLK: 65 Shore A EVA Black Frame
FR-EVA-65A-WHI: 65 Shore A EVA White Frame

 

ABOUT
EVA, or ethyl vinyl acetate, is a closed-cell foam material used for orthotic frames and frame filler. It makes up the foundation of the heel cup, the material that extends distally to proximal of the metatarsal heads and the inferior arch frame support. This material comes in a variety of durometers or hardnesses based on Albert Ferdinand’s Shore A scale. The prescribing process is simplified based on rigidity scale:

• Myolite is flexible
• 30 EVA is semi-flexible
• 45 EVA is semi-rigid
• 65 EVA is rigid

For EVA vacuum formed frames, a 3-5mm thick EVA frame is thermo-molded to the positive model. Frame filler is then added to provide reinforcement. For direct mill EVA lab processes, subtractive manufacturing is used to mill out the contour of the orthotic frame directly from the block of selected EVA material.

Note: For flexible EVA rigidities (15 Shore A), Myolite material is used as frame filler.

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