Podcast
Questions and Answers
What happens to wax when it is heated?
What happens to wax when it is heated?
Which statement about the mechanical properties of dental waxes is true?
Which statement about the mechanical properties of dental waxes is true?
What effect does increasing temperature have on the ductility of waxes?
What effect does increasing temperature have on the ductility of waxes?
Which type of dental wax is primarily used in the direct technique?
Which type of dental wax is primarily used in the direct technique?
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What is a desirable property of dental wax?
What is a desirable property of dental wax?
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What is one of the common causes of wax distortion?
What is one of the common causes of wax distortion?
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Which wax type is preferred for the indirect technique used in dental practices?
Which wax type is preferred for the indirect technique used in dental practices?
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What characteristic of wax affects how it records cavity details?
What characteristic of wax affects how it records cavity details?
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What is one of the main physical properties of casting wax?
What is one of the main physical properties of casting wax?
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What is base plate wax primarily used for?
What is base plate wax primarily used for?
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Which type of wax is described as slightly tacky at room temperature and used to secure boxed forms?
Which type of wax is described as slightly tacky at room temperature and used to secure boxed forms?
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What is a key characteristic of utility wax?
What is a key characteristic of utility wax?
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How should dental wax be stored if necessary?
How should dental wax be stored if necessary?
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Which wax is used for the alignment of fractured pieces of dentures temporarily during repairs?
Which wax is used for the alignment of fractured pieces of dentures temporarily during repairs?
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What happens to base plate wax when heated or washed with hot water?
What happens to base plate wax when heated or washed with hot water?
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What is the primary usage of sticky wax in dental procedures?
What is the primary usage of sticky wax in dental procedures?
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What is the primary use of dental waxes in dentistry?
What is the primary use of dental waxes in dentistry?
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Which of the following is NOT a natural source of wax?
Which of the following is NOT a natural source of wax?
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What characteristic does dental wax have regarding its melting range?
What characteristic does dental wax have regarding its melting range?
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How does flow behavior of dental wax change with temperature?
How does flow behavior of dental wax change with temperature?
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What effect does insufficient flow in dental wax have during use?
What effect does insufficient flow in dental wax have during use?
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Which property of dental wax is most affected by low thermal conductivity?
Which property of dental wax is most affected by low thermal conductivity?
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What happens to the pattern created with dental wax at mouth temperature?
What happens to the pattern created with dental wax at mouth temperature?
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What is the significance of the coefficient of thermal expansion in dental waxes?
What is the significance of the coefficient of thermal expansion in dental waxes?
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Study Notes
Dental Wax
- A thermoplastic material that is solid at room temperature but melts easily without decomposition.
- Primarily used in dentistry to form patterns of appliances before casting.
Types of Dental Wax
- Natural Wax: derived from plants (carnauba), insects (beeswax), and minerals (paraffin wax).
- Dental wax: a combination of natural waxes with synthetic waxes, gums, fats, oils, resins, and coloring agents.
Classification
- Processing wax: used for procedures in both clinics and labs (boxing, utility, sticky wax).
- Pattern wax: used to construct metal castings and denture bases (inlay, casting, baseplate wax).
- Impression wax: used to take impressions (corrective impression, bite registration).
Physical Properties
- Melting Range: Has a melting range instead of a single melting point because it is a mixture of different waxes and additives.
- Flow: Dependent on temperature, higher flow as it approaches melting range.
- Residual Stresses: Low thermal conductivity leads to uneven heating and distortion.
- Dimensional Change: Expands when heated and contracts when cooled.
- Mechanical Properties: Low elastic modulus, proportional limit, and compressive strength.
- Ductility: Ductility increases as temperature increases.
Pattern Waxes
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Inlay wax: used to prepare wax patterns for inlays, crowns, and bridges.
- Type I (medium wax): used in direct technique for in-mouth procedures.
- Type II (soft wax): used in indirect technique for lab procedures.
- Casting wax: used to construct the metal framework of partial and complete dentures.
- Baseplate wax: pink sheets used to simulate gingival color.
Processing Waxes
- Boxing wax: green or black sheets used to create a form for pouring gypsum models.
- Utility wax: also called periphery wax, orange or dark red ropes/sheets used to adapt impressions and enhance patient comfort.
- Sticky wax: yellow or orange sticks used to align fractured dentures or components during repair.
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Description
Explore the fascinating world of dental wax, a key material in dentistry. This quiz covers its properties, types, and applications in creating dental appliances. Test your knowledge on processing, pattern, and impression waxes used in both clinical and laboratory settings.
