Why Do Some Clinicians Place Three or Four 2-Mm-Diameter Holes

question 32

Multiple Choice

Why do some clinicians place three or four 2-mm-diameter holes in the wax spacer in the anterior and posterior ridge regions?

• A) The spacer creates a uniform thickness for impression material.
• B) The holes help prevent the wax from separating from the stone model.
• C) Placing holes creates a mesh for bonding of acrylic to a metal framework.
• D) It helps orient the tissue-bearing side of the tray toward the teeth.

---

Definitions:

Cone Cells

Photoreceptor cells in the retina of the eye responsible for color vision and visual acuity under bright light conditions.

Retinal Neurons

Specialized nerve cells located in the retina that process visual information and transmit it to the brain.

Amacrine

A type of neuron in the retina that plays a critical role in the visual processing pathway by modulating the signal between bipolar cells and ganglion cells.

Superior Colliculus

A structure located in the midbrain that plays a role in visual processing and eye movement control.