Kellie Woodie
DEN 102
Assignment 7
11-18-11
Impression (bite registration) wax- used to record the patients centric occlusion
Pattern Wax- sometimes referred to as inlay wax, used on a die, which is a positive replica of a prepared tooth poured in the laboratory (die) stone
Processing Wax- those most commonly used in dentistry include boxing wax, utility wax, and sticky wax
Study Wax- hard wax manufactured in blocks; used primarily for educational purposes to teach carving of teeth and dental anatomy
Undercut Wax- used to fill undercuts of dental structures prior to taking impressions (to prevent the impression material from sticking to the prepared teeth)
Critical Thinking
1.) Why must the dental assistant take great care to store dental waxes away from excessive heat? Due to the low melting point of some dental waxes
2.) When taking a wax bite, why must the wax bite registration material be heated in a bowl of water first? To make the wax pliable (bendable)
3.) When taking a wax bite registration, why might the dental assistant be asked to apply air to the wax while the patient holds it in centric positon? To facilitate cooling of the wax.
POSTTEST
1. Waxes used in dental offices today are manufactured from a variety of sources, including all of the following except: acrylics
2. All of the following statements are true of pattern wax, except: it is difficult to carve
3. Baseplate wax is hard and brittle. It is heated to form the initial base in processing dentures.
4. Boxing wax is used to create a tight seal around an alginate impression prior to pouring it in gypsum
5. All of the following statements are true regarding sticky wax, except: it is soft and sticky at room temperature
6. Utility wax is used to bead around the periphery of impression trays to extend them to ease patient comfort.
7. The purpose of taking a bite registration is to replicate the patient’s normal occlusion for the...