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Questions and Answers
What is the primary purpose of using a labial flange addition to the open-face denture?
What is the primary purpose of using a labial flange addition to the open-face denture?
What is a key precaution when fabricating the alginate mold?
What is a key precaution when fabricating the alginate mold?
Why is silicone impression material recommended for reline impressions?
Why is silicone impression material recommended for reline impressions?
What potential problem arises from an indented alginate impression of the ridge?
What potential problem arises from an indented alginate impression of the ridge?
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What is emphasized for selecting stock teeth during template fabrication?
What is emphasized for selecting stock teeth during template fabrication?
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What is the primary purpose of producing temporary duplicate dentures?
What is the primary purpose of producing temporary duplicate dentures?
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Which of the following techniques is NOT mentioned for producing a template for a duplicate denture?
Which of the following techniques is NOT mentioned for producing a template for a duplicate denture?
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During the first visit for denture duplication, which of the following is NOT performed?
During the first visit for denture duplication, which of the following is NOT performed?
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What material is typically used to create a mould of the old denture?
What material is typically used to create a mould of the old denture?
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Which step is performed after the alginate has set and the base has been trimmed?
Which step is performed after the alginate has set and the base has been trimmed?
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What type of container is mentioned for supporting the mould of the denture?
What type of container is mentioned for supporting the mould of the denture?
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What modification might be implemented based on a patient's adaptation to a temporary duplicate denture?
What modification might be implemented based on a patient's adaptation to a temporary duplicate denture?
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Which material may be used to fabricate teeth for temporary duplicate dentures?
Which material may be used to fabricate teeth for temporary duplicate dentures?
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What is indicated when a patient with old dentures wants new ones that have similar features?
What is indicated when a patient with old dentures wants new ones that have similar features?
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What characteristic of the old dentures indicates alveolar ridge resorption?
What characteristic of the old dentures indicates alveolar ridge resorption?
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Which step is performed after adjusting the occlusal plane level in the fabrication of new dentures?
Which step is performed after adjusting the occlusal plane level in the fabrication of new dentures?
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What material is used to produce the replica of teeth in the duplication process?
What material is used to produce the replica of teeth in the duplication process?
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How is the old denture utilized during the tooth arrangement of the new dentures?
How is the old denture utilized during the tooth arrangement of the new dentures?
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What is the purpose of the intra-oral wax try-in during the denture duplication process?
What is the purpose of the intra-oral wax try-in during the denture duplication process?
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During the agar-agar duplication technique, what is used to suspend the dentures?
During the agar-agar duplication technique, what is used to suspend the dentures?
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What happens after the agar is set in the duplication technique?
What happens after the agar is set in the duplication technique?
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What is the purpose of cutting sprue holes into the posterior border of the alginate mold?
What is the purpose of cutting sprue holes into the posterior border of the alginate mold?
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During the second visit, what procedures are typically performed?
During the second visit, what procedures are typically performed?
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What material is used to modify the denture borders in the soap container technique?
What material is used to modify the denture borders in the soap container technique?
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What is the role of the elastic bands during the duplication process?
What is the role of the elastic bands during the duplication process?
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What occurs after the resin is poured into the mold and allowed to process in a pressure pot?
What occurs after the resin is poured into the mold and allowed to process in a pressure pot?
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Which of the following steps must be completed before the dentures are polished?
Which of the following steps must be completed before the dentures are polished?
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Under what conditions is the resin processed in a pressure pot?
Under what conditions is the resin processed in a pressure pot?
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What is the purpose of the try-in of the dentures during the second visit?
What is the purpose of the try-in of the dentures during the second visit?
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What is the primary purpose of creating a duplicate denture?
What is the primary purpose of creating a duplicate denture?
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Under what circumstances should a denture not be duplicated?
Under what circumstances should a denture not be duplicated?
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What is one of the indications for duplicating a denture?
What is one of the indications for duplicating a denture?
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Which of the following is NOT a common aim of denture duplication?
Which of the following is NOT a common aim of denture duplication?
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What evaluation must be done before deciding to duplicate a denture?
What evaluation must be done before deciding to duplicate a denture?
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Which factor is NOT typically considered when evaluating a denture for duplication?
Which factor is NOT typically considered when evaluating a denture for duplication?
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Why might duplicate dentures be especially beneficial for older patients?
Why might duplicate dentures be especially beneficial for older patients?
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What is a potential benefit of duplicating a denture for research purposes?
What is a potential benefit of duplicating a denture for research purposes?
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Study Notes
Complete Denture Duplication
- Definition: A duplicate denture is a second denture, intended as a copy of the original. It's also known as a copy denture, template denture, or replica denture.
Aims
- Transfer of Contours: Transferring the contours from the old to new dentures for maintaining neuromuscular control.
- Modifications: Making only necessary adjustments to the old denture's shape to correct fit issues (patient complaints), as determined by the operator. This may involve adjusting the OVD (occlusal vertical dimension) and replacing worn teeth.
- Minimizing Adaptation: Creating a new denture that closely resembles the original to minimize fitting problems for the patient.
- Uniting Production Stages: Combining stages of the production process for faster and more efficient clinical production, fitting within a few visits.
Indications
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Replacement for Older Patients: Creating replacements for older patients who are accustomed to their current dentures but have problems with fit or material deterioration. It's challenging to adjust to dentures with different surface contours.
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Renewal of Denture Base: Producing a duplicate denture with a new, improved denture base material to replace a damaged or stained denture. This will give a completely new appearance.
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Spare Dentures: Creating an extra denture in case of a broken or missing original denture for use during necessary repair or relining. Patients want to avoid being without functional dentures during repair procedures.
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Experimental Occlusal Changes: Creating a duplicate denture for experimental adjustments to the occlusal relationship of dentures (clinical/research reasons). The duplicate denture is used without impacting the original.
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Immediate Denture Replacement: Replacing immediate dentures with a new fitted one.
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When to Duplicate a Denture: Only when evaluation of the denture reveals no issues with aesthetics, psychology, and physiology of the patient
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Evaluation procedure: Evaluation of existing denture: fractures, craze lines, missing or replaced teeth, dental aesthetics, pronunciation accuracy and vertical/centric relationships
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Temporary Duplicate Dentures: Often produced if it is not clear if the patient can adapt well to the modifications, perhaps with gradual changes to occlusal vertical dimension. The costs are lower, and it can be completed in less clinical and laboratory time. Once successfully adapted, it can then be copied and used to produce a permanent one.
Denture Duplication Techniques
- Modified Denture Flask Method
- Duplicating Flask Method
- Pour Resin Flask Method
- Cup Flask Method
- Soap Container Method
- Agar Container Method
Denture Duplication Technique 'The Duplicating Flask'
- First Visit: Making a duplicate of the old denture from auto-polymerizing resin. Recording of centric jaw relation and selection of shade, size and form of denture teeth. The dentist and patient may modify the selections if the older duplicate is unacceptable.
- Laboratory Procedures: Making impressions of the dentures (using alginate) in a rigid container (e.g., a duplicating flask, modified denture flask or a soap container).
Waxed/Auto-Polymerized Dentures
- Wax or Auto-Polymerized Dentures: The duplicate dentures are recovered from the molds.
- Waxed Teeth/Acrylic Bases: Templates with waxed teeth and self-cured acrylic resin bases are created.
- Centric Relation Record: A record of centric relation is taken after setting the waxed teeth to account for the occlusal vertical dimension (OVD).
Denture Duplication Technique 'The Silicon Putty'
- Patient Case: An 80-year-old patient with 25-year-old dentures with reduced occlusal vertical dimension (OVD).
- Patient Satisfaction: The patient was happy with the existing denture appearance wanting similar features on the new denture
Problem Areas and Solutions
- Rigidity of the Box: Use rigid containers to avoid distortion of the alginate and acrylic resin template.
- Alginate Ridge Distortion: Check the impression of the alginate ridge to prevent problems like indenting.
- Impression and Jaw Relation Records: Careful, thorough procedures, and the use of silicone impression materials for obtaining reline impressions.
- Tooth Position and Tissue Contours: Careful positioning and placement of the denture teeth to facilitate neuromuscular control.
Additional Techniques:
- Soap Container Technique
- Agar-Agar Technique
These notes outline several aspects of denture duplication, highlighting the purposes, techniques, and considerations.
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Description
Explore the process and aims of complete denture duplication, which involves creating a replica denture based on the original. This quiz covers the transfer of contours, necessary modifications, and the importance of minimizing adaptation for patient comfort. Understanding these aspects is crucial for efficient clinical practice.
