Prosthetic Dentistry II: Record Base and Wax Rim Fabrication

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Questions and Answers

What are the two determinants of the occlusal plane when the wax rim is ideally contoured and mounted?

  • The middle third of the lateral incisor and the incisal edge of the retromolar pads bilaterally
  • The incisal edge of the lateral incisor and the middle third of the retromolar pads bilaterally
  • The middle third of the central incisor and the incisal edge of the retromolar pads bilaterally
  • The incisal edge of the central incisor and the middle third of the retromolar pads bilaterally (correct)

What aids in developing contour of the lips and cheeks when the wax rim is contoured with the rim former?

  • The centric relation record
  • The distance between marks on the wax rims
  • The wax rim (correct)
  • The position of the corners of the mouth marked on the wax rims

What do the wax rims aid in determining for the clinician?

  • The position of the corners of the mouth
  • The proper horizontal dimension of occlusion
  • The proper vertical dimension of occlusion (correct)
  • The centric relation record

What serves as a general aid in tooth selection?

<p>Wax rims (D)</p> Signup and view all the answers

In which region are anterior maxillary teeth arranged according to the labial contours developed in the patient?

<p>$\text{Anterior maxillary}$ (B)</p> Signup and view all the answers

What is used to make centric relation records?

<p>Wax rims (A)</p> Signup and view all the answers

What aids in positioning anterior teeth when properly contoured in the anterior region?

<p>Wax rim (D)</p> Signup and view all the answers

What can serve as a guide for tooth selection based on marked distances?

<p>Distance between marks on wax rims (C)</p> Signup and view all the answers

What is the ideal palate thickness for a record base?

<p>1-2mm (A)</p> Signup and view all the answers

Which materials are mostly used for record base fabrication?

<p>Cold self-cure and light cure acrylic resins (D)</p> Signup and view all the answers

What is the process of record base polymerization?

<p>In a pressure pot (20 psi, 110 degrees water, 10-15 minutes) or under an overturned rubber mixing bowl (A)</p> Signup and view all the answers

What are the key functions of a record base?

<p>Support and stability, accurate adaptation to the cast, and proper occlusal relationships (B)</p> Signup and view all the answers

What are occlusion rims used for?

<p>Recording jaw relations and arranging teeth (C)</p> Signup and view all the answers

How are occlusion rims fabricated?

<p>By using modeling plastic material to create the rims on a custom tray (C)</p> Signup and view all the answers

What is the purpose of occlusion blocks in prosthetic dentistry?

<p>To make maxillomandibular relation records and to arrange teeth (B)</p> Signup and view all the answers

What are the requirements of a denture base?

<p>Stable in mouth and on the stone model (C)</p> Signup and view all the answers

What is the purpose of a record base in prosthetic dentistry?

<p>To transfer accurate jaw relationships to an articulator (A)</p> Signup and view all the answers

What is the main characteristic of a temporary record base?

<p>They are discarded and replaced by denture base material once their role is complete (D)</p> Signup and view all the answers

What are the methods of construction for record bases?

<p>$1$. Sprinkle on method $2$. Finger adapted dough method $3$. Flasking method $4$. Wax confined method (A)</p> Signup and view all the answers

What is the purpose of a denture base in prosthetic dentistry?

<p>$1$. To provide support for artificial teeth $2$. To restore function and aesthetics $3$. To maintain oral health and hygiene $4$. To adjust occlusion and jaw relationships (C)</p> Signup and view all the answers

Flashcards

What determines the occlusal plane when the wax rim is ideally contoured and mounted?

The incisal edge of the central incisor and the middle third of the retromolar pads bilaterally.

What do the wax rims help to determine for the clinician?

The wax rim helps the clinician to understand the proper vertical dimension of occlusion.

In which region are anterior maxillary teeth arranged according to the labial contours developed in the patient?

Anterior maxillary teeth are arranged based on the labial contours created on the patient during the wax rim process.

What is used to make centric relation records?

Wax rims aid in creating centric relation records, which are recordings of the jaw's position when the teeth are in their most stable and centered relationship.

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What aids in positioning anterior teeth when properly contoured in the anterior region?

The wax rim, when properly contoured, helps in accurately positioning the anterior teeth, especially in the front region.

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What can serve as a guide for tooth selection based on marked distances?

The distance between marks on the wax rims can guide the selection of appropriate teeth based on the measurements.

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What is the ideal palate thickness for a record base?

The ideal thickness for a record base is 1-2mm.

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Which materials are mostly used for record base fabrication?

Cold self-cure and light cure acrylic resins are common materials used to create record bases.

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What is the process of record base polymerization?

Record base polymerization is usually done in a pressure pot.

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What is the purpose of a record base in prosthetic dentistry?

Record bases help in transferring accurate jaw relationships to an articulator.

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What is the purpose of a denture base in prosthetic dentistry?

A denture base provides support for artificial teeth, helps restore function and aesthetics, maintains oral health and hygiene, and adjusts occlusion and jaw relationships.

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What is the main characteristic of a temporary record base?

A record base is temporary and is removed once the denture base is made.

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What is the purpose of occlusion blocks in prosthetic dentistry?

Occlusion blocks are used to create maxillomandibular relation records and help in arranging teeth.

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What are the requirements of a denture base?

A denture base needs to be stable both in the mouth and on the stone model.

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What are occlusion rims used for?

Occlusion rims are used for recording jaw relations and arranging teeth.

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How are occlusion rims fabricated?

Occlusion rims can be fabricated using modeling plastic material.

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What are the methods of construction for record bases?

There are a few methods for creating record bases: Sprinkle on method, Finger adapted dough method, Flasking method, and Wax confined method.

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Study Notes

  • Record base: part of a denture that provides support and stability to the denture itself
  • Ideal record base characteristics: strength and rigidity, accuracy, smooth rounded borders, palate thickness (1-2mm), palate thickness and contour defined by the master cast land
  • Materials: mostly used are cold self-cure and light cure acrylic resins, baseplate wax, swaged tin, aluminum foil
  • Record base fabrication: blocking out master casts, using a red pencil, flowing wax over outlined areas, using a cloth polishing wheel, large camel’s hair brush, and a red handle knife, using a Bunsen burner and autopolymerizing acrylic resin
  • Record base polymerization: process in a pressure pot (20 psi, 110 degrees water, 10-15 minutes), or under an overturned rubber mixing bowl
  • Record base preparation: soaking the polymerized record base and casts in hot water, removing the record bases without damaging the casts, removing excess block-out wax, and modifying unfinished record bases
  • Completed record bases: consistencies in palate thickness, retromolar pad coverage, thin labial areas, roughened ridge areas, and no porosity or voids on tissue surfaces
  • Occlusion rims: occluding surfaces constructed on record bases or permanent denture bases for recording jaw relations and arranging teeth
  • Occlusion rim fabrication: using a maxillary record base, heating baseplate wax, forming the occlusal aspect, and contouring the buccal and labial aspects with a hot plate
  • Instruments and materials: baseplate wax, wax spatula, occlusal plane former (hot plate), technical procedures involve heating and forming wax and using a Bunsen burner
  • Record base functions: support and stability, accurate adaptation to the cast, and proper occlusal relationships.

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DEN203 Prosthetic Dentistry II - Record Base and Wax Rim Fabrication PDF

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