All of the following are important orthotic principles except:

• A. Avoid pressure on bony prominences
• B. Shorter and narrower orthotics distribute pressure better
• C. Check functional use of allow motion of uninvolved joints
• D. Flare and round edges of orthotic

Answer: (B)

Orthotic design aims to protect the skin and preserve function by distributing pressure across a broad surface and avoiding concentrated loads. A well-made orthosis should avoid pressure on bony prominences to prevent skin breakdown, enable functional movement by allowing motion of uninvolved joints, and have flared and rounded edges to minimize irritation and shear at the margins. Longer and wider contact areas help spread the load more evenly, improving comfort and stability.

The statement that shorter and narrower orthotics distribute pressure better isn’t correct because reducing length or width decreases the contact area, concentrates pressure on fewer points, and can increase risk of pressure injuries and instability. The other principles described align with good orthotic design.