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The Movin' Groovin' Outer Ear

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1.  The Lantos 3D Scanning System
  1. uses an uncovered metal probe-camera to scan the ear.
  2. can image the ear canal and but not the concha.
  3. images the inside surface of a conforming membrane placed in the ear.
  4. can be used on infants.
2.  How does one know how deep to place the camera of the Lantos 3D Scanning System in the ear?
  1. The audiologist can see the tympanic membrane and aligns an on-screen circle to the annulus at approximately 5 mm distance.
  2. The audiologist relies on the patient to yell out when the tympanic membrane is touched.
  3. There is a marking on the scanner showing 25 mm depth.
  4. There is a guide bar on the side of the screen that flashes when placement is reached.
3.  Ear dynamics refers to __________, while ear compliance refers to _________.
  1. the bony-cartilaginous junction; the first to second bend region
  2. the motion of the outer ear during jaw or head motion; the bony-cartilaginous junction
  3. the varying flexibility of parts of the outer ear; the motion of the outer ear during jaw or head motion
  4. the motion of the outer ear during jaw or head motion; the varying flexibility of parts of the outer ear
4.  The temporomandibular joint does not
  1. glide and pivot
  2. cross the center plane of the body
  3. contain a disc
  4. connect the mandible and the parietal bone
5.  Typically, what wall of the ear canal shows the most displacement with jaw opening and closing?
  1. superior
  2. inferior
  3. anterior
  4. posterior
6.  Select the correct order of historical events:
  1. first ear impression, first dental impression, first ITE, digital shell modeling
  2. first ear impression, powder-liquid acrylic material impression developed, digital shell modeling, direct ear scanning
  3. first ear impression, silicone impression material developed, powder-liquid acrylic impression material developed, 3D printing of hearing aid shells
  4. first dental impression, first ear impression, direct ear scanning, digital shell modeling
7.  Based on comparisons between Lantos scans and ear impressions, to create a better seal, the best places to add material are:
  1. at the superior and inferior part of the aperture.
  2. at the superior and posterior part of the aperture.
  3. at the anterior and posterior part of the aperture.
  4. at the anterior and superior part of the aperture.
8.  By convention, in axial CT scan images, the patient is lying supine with what toward the viewer.
  1. head
  2. feet
  3. face
  4. back
9.  CT scan data indicate that the second bend of the ear canal is typically
  1. completely surrounded by bone
  2. completely surrounded by cartilage
  3. at the bony-cartilaginous junction
  4. surrounded primarily by adipose tissue
10.  Pushing on the ear while scanning or taking an impression can
  1. compress the first bend
  2. compress the second bend
  3. result in an unnatural ear shape from which to model an earpiece
  4. all of the above