Term
| What are the Rigid material? |
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Definition
| "Rohadur, Polydor, and Polypropylene" |
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Term
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Definition
| Grandfather of rigid materials. Burnt orange. Thickness in mm’s. No longer manufactured. Easy to heat in office. Will not deform. Fracture! |
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Term
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Definition
| "Replacement for rohadur. More colors (fluorescents). Thickness in mm’s. Thought to have problems w/ strength. Easy to press into + cast and heat in office. Will not deform. Fractures, usually at RF post or at extrinsic FF post." |
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Term
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Definition
| "Polyethylene. Inexpensive. Rigid, Semi flexible or Flexible. Thicker the material, more rigid. Thickness in fractions of inches. Difficult to press or heat in office. Over time lose shape. More tolerable. " |
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Term
| What is the most popular orthotic material? |
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Definition
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Term
| When should Polypropylene NOT be used? |
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Definition
| When strict control calls for a rigid device. |
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Term
| T/F Polypropylene is inexpensive? |
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Definition
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Term
| What are the disadvantages of Polypropylene? |
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Definition
| Difficult to heat and have to use a new orthotic if you screw up. |
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Term
| What are the TL 2100 or other Graphite Composite materials? |
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Definition
| Fiberglass composite. Expensive! Mostly rigid. Thinner than rohadur. 1.0-1.5 mm’s. Front edge can cut into shoe. Fractures. Heating difficult. |
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Term
| What is the biggest advantage to Graphite Composite materials? |
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Definition
| Material is thinner than Rohadur 1.0 mm. |
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Term
| T/F Graphite Composite material has a wide heating range? |
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Definition
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Term
| What are other Graphite Composite materials? |
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Definition
| "TL-Blue, TL-61, Superform. All are variants of same concept." |
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Term
| What is the most expensive material? |
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Definition
| Graphite Composite material |
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Term
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Definition
| Cork and latex. Accommodative and Extrinsic Posts. Easy to work and grind. Flexible that does not deform under compression. (Leather Rubber Butters) |
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Term
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Definition
| "Closed Cell Material. Accommodative. Compression areas of greatest pressure. Easy to work and grind. Insoles (used to find areas of greatest pressure) Easily heat moldable. Temporary orthotics. Different densities. Higher density, higher resistance to compression." |
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Term
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Definition
| "Many different types. Good shock absorption. Different densities, thicknesses. Good shock absorption. (used in arch of rigid orthotic to provide greater strength and less flexibility." |
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Term
| What are examples of Sponge materials in orthotics? |
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Definition
| "PPT (Podiatric Protective Technology), Poron, Pelite" |
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Term
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Definition
| Neoprene w/ a fabric cover that disperses shearing forces. Good for athletes. Decrease calluses and blisters. |
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Term
| What are some Top Covers? |
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Definition
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Term
| What is the most popular Top cover? |
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Definition
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Term
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Definition
| A synthetic material (vinyl like). Strong that will not absorb sweat. Easy to clean. |
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Term
| T/F Top Covers are a necessary component of any orthotic? |
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Definition
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Term
| What are the 3 ways the top cover is placed on the orthotic? |
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Definition
| "On the orthotic itself., Extending under the met heads, and extending under the toes." |
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Term
| What is real benefit of a Top Cover? |
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Definition
| Extending the top cover further distally can stabilize the orthotic and preventing transverse plane motion in the shoe. |
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Term
| What is the most important feature on the positive cast? |
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Definition
| Bisection of the heel (only feature the lab has to go on) |
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Term
| What are the 3 options for pouring a cast? |
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Definition
| "Neutral, Inverted, or Everted" |
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Term
| What is Separation Media? |
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Definition
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Term
| What things can we do with a positive cast after it has been made? |
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Definition
| Add a FF Platform for intrinsic posting. We can also add medial or lateral arch plaster fill to accommodate FF Platform. Accommodations for PF or a plantar-flexed 2nd met. |
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Term
| What is Lateral Expansion? |
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Definition
| Done routinely by lay unless said otherwise. 1/8” of plaster added to accommodate the fact that when we stand on our feet the fat pad of the calcaneus displaces laterally. Adding this will make the heel cup fit the foot better. |
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Term
| What is the fx of the Vacuum Press? |
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Definition
| To press the material onto the positive cast. The easiest way to accomplish this. |
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