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Questions and Answers
What corrective action should be taken if an error is caused by a high cusp?
What corrective action should be taken if an error is caused by a high cusp?
Which of the following conditions would require the grinding of the cusp inclined?
Which of the following conditions would require the grinding of the cusp inclined?
What is the purpose of grinding the fossae?
What is the purpose of grinding the fossae?
If a dental adjustment is needed due to a buccal shift, what should be performed?
If a dental adjustment is needed due to a buccal shift, what should be performed?
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Which procedure is aimed at correcting an issue related to a lateral shift?
Which procedure is aimed at correcting an issue related to a lateral shift?
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What was done to the master casts before they were plastered to the articulator?
What was done to the master casts before they were plastered to the articulator?
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Why was petroleum jelly applied to the master casts?
Why was petroleum jelly applied to the master casts?
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What was the purpose of cutting location grooves into the master casts?
What was the purpose of cutting location grooves into the master casts?
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What is the expected benefit of detaching the master casts from the topping plaster?
What is the expected benefit of detaching the master casts from the topping plaster?
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In what areas was petroleum jelly applied on the master casts?
In what areas was petroleum jelly applied on the master casts?
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What should be ground if the anterior teeth have heavy contact but the posterior teeth have no contact?
What should be ground if the anterior teeth have heavy contact but the posterior teeth have no contact?
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Which surface of the upper anterior teeth is ground to correct heavy contact with the anterior teeth?
Which surface of the upper anterior teeth is ground to correct heavy contact with the anterior teeth?
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Why is it necessary to adjust protrusive relations in dental occlusion?
Why is it necessary to adjust protrusive relations in dental occlusion?
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Which of the following describes a situation necessitating adjustment of tooth surfaces?
Which of the following describes a situation necessitating adjustment of tooth surfaces?
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What type of contact occurs on the posterior teeth when there is heavy contact on the anterior teeth?
What type of contact occurs on the posterior teeth when there is heavy contact on the anterior teeth?
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What is the purpose of creating indices on the master cast during the mounting process?
What is the purpose of creating indices on the master cast during the mounting process?
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Why is it important to keep the mounting and articulator in the same relationship after separating the master cast?
Why is it important to keep the mounting and articulator in the same relationship after separating the master cast?
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What is the first step after finishing the occlusal relationship between the two wax rims?
What is the first step after finishing the occlusal relationship between the two wax rims?
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What is the main benefit of using wax rims in dental procedures?
What is the main benefit of using wax rims in dental procedures?
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What is typically done with the master cast before the flasking procedure begins?
What is typically done with the master cast before the flasking procedure begins?
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What should be avoided during the milling process?
What should be avoided during the milling process?
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What must be done with carborundum after milling is completed?
What must be done with carborundum after milling is completed?
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What is the final step after grinding the surfaces of the teeth?
What is the final step after grinding the surfaces of the teeth?
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Which stroke technique is recommended during the milling procedure?
Which stroke technique is recommended during the milling procedure?
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What should be ensured about the tooth surfaces after grinding according to the guidelines?
What should be ensured about the tooth surfaces after grinding according to the guidelines?
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What is the primary role of the maxillary palatal cusps and the mandibular buccal cusps?
What is the primary role of the maxillary palatal cusps and the mandibular buccal cusps?
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Which of the following statements about cusps is accurate?
Which of the following statements about cusps is accurate?
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What might happen if the maxillary palatal and mandibular buccal cusps are not functioning properly?
What might happen if the maxillary palatal and mandibular buccal cusps are not functioning properly?
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How do the maxillary palatal cusps influence dental occlusion?
How do the maxillary palatal cusps influence dental occlusion?
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Which pair of cusps are specifically mentioned for their role in vertical dimension?
Which pair of cusps are specifically mentioned for their role in vertical dimension?
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Study Notes
Prosthodontics Study Notes
- Sheet #13: Part of a larger course or textbook on prosthodontics.
- Topics Covered: Laboratory remount, selective grinding, finishing the denture, complete denture clinical/lab steps, sources of occlusal errors, processing errors, remounting (lab and clinical), and advantages.
- Authors/Editors: Asma'a Abu-Qtaish, Lajneh Teejan, and Rasha Alomoush
- Date: 2022
Processing Errors
- Denture Expansion: Investing material expansion during processing can increase the vertical dimension of occlusion (VDO).
- Polymerization Shrinkage: Resin shrinkage during the processing (deflasking) may cause internal stresses.
- Heat Generation: Heat generated during finishing and polishing can cause tooth movement.
- Excessive Packing: Excessive pressure during processing can force teeth into plaster, leading to movement.
Sources of Occlusal Errors
- TMJ Changes: Changes in Temporomandibular Joint (TMJ) state can affect occlusal records.
- Interocclusal Records: Inaccurate records by the dentist.
- Articulator Errors: Errors in transferring relations to the articulator.
- Record Bases: Ill-fitting record bases.
- Vertical Dimension Changes: Incorrect vertical dimension at the articulator.
- Wax Dimensional Changes: Wax isn't dimensionally stable after setting up, this should be slight if occlusion of wax-up is carefully examined before flasking..
Remounting
- Laboratory: Performed after deflasking before handing the dentures to the patient.
- Clinical: Done using new recordings from the patient and new mounting.
- Purpose: To bring back pre-processing vertical dimension (VDO) and reset incisal pin contacts.
Selective Grinding
- Purpose: Eliminates errors caused by processing.
- Procedure: Modification of occlusal surfaces of teeth using selective grinding.
- Considerations: Selective grinding doesn't correct errors from impressions or jaw relation records, mounting, or errors during polishing.
Obtaining Even Contact in Centric Occlusion
-
Procedure:
- Lock upper arm of articulator in centric relation and check occlusion.
- Loosen locks, move denture for eccentric movements.
- Cusp Correction: If cusp is high: deepen the opposing fossa.
- Uniform Contact: Ensure uniform contact on posterior teeth in centric occlusion.
Adjusting Protrusive Relations
- Posterior Contact: Grind labial surface of lower anterior and palatal surface of upper anterior if anterior teeth contact heavily with no posterior contact/separation.
- Maxillary/Mandibular Cusps: Reduce distal inclines of maxillary cusps and mesial inclines of mandibular cusps if heavy posterior contact exists but no anterior contact.
Finishing the Denture
- Carborundum Paste: The articulator is moved using carborundum paste for smoothing the gliding surface of the teeth.
- Milling: Must be done lightly to prevent losing balancing contacts, potentially decreasing vertical dimension.
- Removing Sharpness: Blebs are removed carefully using a discoid carver or mounted rubber points (polishing).
- Polishing: External surfaces are polished using wet rag wheels.
References
- Specific chapters from textbooks are listed.
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Description
This quiz covers essential topics in prosthodontics including laboratory remounting, selective grinding, and finishing complete dentures. It explores various sources of occlusal errors, processing errors, and their implications on denture quality. Prepare for advanced studies in prosthodontic techniques with these study notes.
