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

    What is used to make centric relation records?

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

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

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

    What is the ideal palate thickness for a record base?

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

    What are occlusion rims used for?

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

    What are the requirements of a denture base?

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

    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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    Related Documents

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

    Description

    Test your knowledge on the fabrication of record base and wax rim in prosthetic dentistry. Topics include occlusion blocks, denture bases, and maxillomandibular relation records.

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