IHS Earmold and Impression Techniques 2

Question 1

Which impression material property is most critical when taking an impression on a patient with a very narrow ear canal?

Accepted Answer

Low viscosity to flow into tight spaces without excessive pressure

Answer

Low-viscosity material flows into narrow canals without requiring excessive injection force that could cause discomfort or a distorted impression.

Question 2

What is the primary purpose of placing an otoblock (dam) before taking an ear impression?

Accepted Answer

To protect the tympanic membrane from impression material

Answer

The otoblock acts as a physical barrier to prevent impression material from contacting or damaging the tympanic membrane.

Question 3

A patient with an open jaw impression shows a significant gap between the impression and the tragus area when the mouth is closed. This most likely indicates:

Accepted Answer

The temporomandibular joint movement was not adequately captured

Answer

TMJ movement changes the shape of the ear canal, and a gap at the tragus suggests the open-jaw technique did not fully account for this dynamic change.

Question 4

Which earmold style is most appropriate for a patient with severe-to-profound hearing loss who needs maximum low-frequency amplification?

Accepted Answer

Full-shell earmold with no vent or a minimal vent

Answer

A full-shell earmold with minimal or no venting provides the best acoustic seal to prevent feedback and retain low-frequency energy needed for severe-to-profound loss.

Question 5

What does the term 'shrinkage' refer to in the context of earmold laboratory processing?

Accepted Answer

Dimensional change of the earmold material as it cures or cools

Answer

Shrinkage is the dimensional reduction that occurs as acrylic or silicone materials polymerize or cool, which can affect the final fit of the earmold.

IHS - International Hearing Society Practice Test

IHS - International Hearing Society Practice Test

IHS Earmold and Impression Techniques 2