20 Questions
What are the two determinants of 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 is the purpose of contouring the wax rim with a rim former?
To develop the desired lip and cheek contours
How do wax rims aid in determining the proper vertical dimension of occlusion?
By aiding in determining the proper lip and cheek contours
What serves as a guide for tooth selection when marked on wax rims?
The distance between marks indicating position of corners of mouth
What part of a properly contoured wax rim aids in positioning anterior teeth?
The anterior region (arrows)
What is used to make centric relation records?
Wax rims
Where are anterior maxillary teeth arranged according to developed contours?
According to labial contours developed in the patient
Who is Rana Turunç Oğuzman?
Professor at Altınbaş Üniversitesi
What are the requirements of a denture base?
Stable, biocompatible, rigid, properly extended, relieved from any undercuts
What is the purpose of occlusion blocks?
To make maxillomandibular relation records and to arrange teeth
What is the function of a record base?
To simulate the finished denture base and transfer accurate jaw relationships to an articulator
What happens to temporary record bases once their role is complete?
They are discarded and replaced by denture base material
What is the purpose of using Cold Cure Acrylic in record base fabrication?
To construct temporary record bases
What are the types of temporary record base materials mentioned in the text?
Not provided in text
Which material is mostly used for record bases?
Cold self-cure acrylic resin
What is the purpose of occlusion rims?
For jaw relation recording and tooth arrangement
What is the sprinkle-on technique used for in maxillary record base fabrication?
Adding resin
What is involved in mandibular wax rim fabrication?
Centering the rim over the crest of the ridge
What is used to determine incisor position and occlusal plane?
"Fox" occlusal plane
How are maxillary and mandibular wax rims fabricated?
Using a hot plate (occlusal plane former) and various instruments like a wax spatula and paper towel.
Study Notes
- Record base plays a crucial role in denture fabrication, ensuring strength, rigidity, and accuracy.
- Ideal record base should not move on the cast, have smooth, rounded, well-polished borders, and palate thickness resembling finished dentures.
- Mostly used materials for record bases are cold self-cure acrylic resin and light cure resin.
- Fabrication of record bases and wax rims involves various instruments and materials like baseplate wax, wax spatula, Hanau torch, cloth polishing wheel, large camel’s hair brush, red handle knife, celluloid mm rule, Bunsen burner, and autopolymerizing acrylic resin.
- Procedures for record base fabrication include blocking out master casts, adding resin, and polymerization.
- For maxillary record base fabrication, the sprinkle-on technique is used to add resin, and the ridge crest is reinforced to prevent slumping.
- For mandibular record base fabrication, the ridge portion must be reinforced and thin to facilitate tooth placement.
- Record base preparation involves soaking the polymerized record base and casts in hot water to soften the block-out wax and gently removing the record bases from the master cast.
- Maxilla areas requiring modification on unfinished record bases include trimming excess flash and thinning the ridge lap portion.
- Completed record bases should have a consistent thickness, no porosity or voids, and smooth, rounded flanges.
- Occlusion rims are occluding surfaces constructed on record bases or permanent denture bases for jaw relation recording and tooth arrangement.
- For wax occlusion rims, they are used for face bow transfer records, developing contours of the lips and cheeks, and measuring the vertical dimension of occlusion.
- Maxillary wax rim fabrication involves heating a sheet of baseplate wax, forming the occlusal aspect of the rim, and contouring the buccal and labial contours.
- Mandibular wax rim fabrication involves centering the rim over the crest of the ridge and ensuring lingual contours do not impinge on tongue space.
- Determine incisor position and occlusal plane using a "Fox" occlusal plane and verify the proper level and angulation of the occlusal plane.
- Fabricate maxillary and mandibular wax rims using a hot plate (occlusal plane former) and various instruments like a wax spatula and paper towel.
Test your knowledge on the fabrication of record base and wax rims in prosthetic dentistry. This quiz covers the use of occlusion blocks, denture bases, and their role in making maxillomandibular relation records.
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