International Licensing Examination (ILE) Practice Test

Vinyl is known for its cost-effectiveness and initial comfort, but it tends to be less durable compared to other earmold materials. One of its significant disadvantages is its tendency to shrink and discolor over time, especially when exposed to moisture and body heat. This degradation can affect the fit and effectiveness of the earmold, making it less reliable for long-term use.

Silicone, on the other hand, is generally more flexible and resistant to thermal changes, making it less prone to shrinkage and discoloration. Acrylic/Lucite is rigid and durable but does not experience the same issues as vinyl. Polyurethane offers a balance of comfort and durability but is also less likely to shrink and discolor compared to vinyl. Understanding these material properties can help in selecting the right earmold for individual needs and preferences.