Podcast
Questions and Answers
What is the primary function of an overdenture?
What is the primary function of an overdenture?
- To improve overall jaw alignment and function
- To completely replace all missing teeth with fixed bridges
- To support remaining natural teeth and implants while covering them (correct)
- To serve as a permanent solution for dental restoration
Which of the following is NOT an advantage of overdenture prosthesis?
Which of the following is NOT an advantage of overdenture prosthesis?
- Complete elimination of bone resorption (correct)
- Preservation of the residual ridge
- Increased support from remaining teeth
- Improved patient esthetics
Under which condition is an overdenture indicated?
Under which condition is an overdenture indicated?
- Presence of multiple healthy teeth suitable for a bridge
- Few remaining teeth that cannot support a partial denture (correct)
- Patient exhibiting excellent oral hygiene
- Patient with severe skeletal malocclusion
Which of the following is a contraindication for an overdenture?
Which of the following is a contraindication for an overdenture?
How does an overdenture help in bone preservation?
How does an overdenture help in bone preservation?
What is a common goal of overdentures?
What is a common goal of overdentures?
In which scenario would an overdenture NOT be the best treatment option?
In which scenario would an overdenture NOT be the best treatment option?
What aspect of patient handling is improved with an overdenture?
What aspect of patient handling is improved with an overdenture?
What is the primary characteristic of a non-coping abutment?
What is the primary characteristic of a non-coping abutment?
What distinguishes short cast copings from long cast copings?
What distinguishes short cast copings from long cast copings?
What is the primary objective of using attachments in abutments?
What is the primary objective of using attachments in abutments?
What is a common disadvantage of using submerged vital roots as abutments?
What is a common disadvantage of using submerged vital roots as abutments?
Which component is NOT part of the attachment system in abutments?
Which component is NOT part of the attachment system in abutments?
How are long cast copings primarily characterized?
How are long cast copings primarily characterized?
What is a common retention method for securing attachments to the abutment?
What is a common retention method for securing attachments to the abutment?
What is a potential challenge associated with submerged vital roots as abutments?
What is a potential challenge associated with submerged vital roots as abutments?
What is a disadvantage of using a spherical retentive element attached to a threaded post for overdentures?
What is a disadvantage of using a spherical retentive element attached to a threaded post for overdentures?
In the one-stage technique without root copings, when should the full-arch impression be made?
In the one-stage technique without root copings, when should the full-arch impression be made?
Which materials can be used for the impression in one-stage technique with existing retentive elements?
Which materials can be used for the impression in one-stage technique with existing retentive elements?
What should not be touched by the custom tray in the full arch impression process?
What should not be touched by the custom tray in the full arch impression process?
What is the primary difference in constructing record bases for tooth-supported overdentures compared to conventional dentures?
What is the primary difference in constructing record bases for tooth-supported overdentures compared to conventional dentures?
When utilizing a full-arch impression with root copings that do not have retentive elements, when is the impression made?
When utilizing a full-arch impression with root copings that do not have retentive elements, when is the impression made?
What is the purpose of transfer matrices in the impression process?
What is the purpose of transfer matrices in the impression process?
Which of the following statements is true regarding the impression technique for overdentures?
Which of the following statements is true regarding the impression technique for overdentures?
What is the primary purpose of simple tooth modification and reduction in abutment preparation?
What is the primary purpose of simple tooth modification and reduction in abutment preparation?
Which condition is NOT an indication for tooth reduction and cast coping?
Which condition is NOT an indication for tooth reduction and cast coping?
In which situation is endodontic therapy and amalgam plug particularly indicated?
In which situation is endodontic therapy and amalgam plug particularly indicated?
What is the expected retention mechanism when using endodontic therapy and cast coping?
What is the expected retention mechanism when using endodontic therapy and cast coping?
Which of the following statements regarding overdentures retained by attachments is true?
Which of the following statements regarding overdentures retained by attachments is true?
What type of shape is typically used in the endodontic therapy and cast coping technique?
What type of shape is typically used in the endodontic therapy and cast coping technique?
For a patient with severe abrasion of teeth, which technique is recommended for abutment preparation?
For a patient with severe abrasion of teeth, which technique is recommended for abutment preparation?
What is a common misconception about the technique of endodontic therapy and cast coping?
What is a common misconception about the technique of endodontic therapy and cast coping?
What is a key criteria for designing the denture base?
What is a key criteria for designing the denture base?
What is one advantage of a denture base that does not cover the gingiva?
What is one advantage of a denture base that does not cover the gingiva?
What happens to temperatures in the gingival sulcus when using closed bases?
What happens to temperatures in the gingival sulcus when using closed bases?
What is a disadvantage of a denture base design that covers the gingiva?
What is a disadvantage of a denture base design that covers the gingiva?
Which statement is true about the basic rules of overdenture base design?
Which statement is true about the basic rules of overdenture base design?
How does the design of the denture base affect plaque retention?
How does the design of the denture base affect plaque retention?
What is the most significant gingival reaction associated with denture bases?
What is the most significant gingival reaction associated with denture bases?
What should be avoided in the design of the denture base with respect to oral hygiene?
What should be avoided in the design of the denture base with respect to oral hygiene?
Flashcards
What is an overdenture?
What is an overdenture?
A removable dental prosthesis that rests on one or more natural teeth or implants.
What are the main goals of overdentures?
What are the main goals of overdentures?
They help preserve the jawbone by reducing bone loss, maintain the natural teeth as part of the jaw structure, and enhance the patient's ability to control the denture.
When are overdentures a good option?
When are overdentures a good option?
When there are only a few remaining natural teeth that are not suitable for fixed or removable partial dentures.
What benefits do overdentures offer for patients with gum issues?
What benefits do overdentures offer for patients with gum issues?
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How do overdentures help with bite issues?
How do overdentures help with bite issues?
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How do overdentures help with bone defects?
How do overdentures help with bone defects?
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What is an alternative use for overdentures?
What is an alternative use for overdentures?
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What are some other indications for overdentures?
What are some other indications for overdentures?
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What is a major contraindication for overdentures?
What is a major contraindication for overdentures?
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What is another contraindication for overdentures?
What is another contraindication for overdentures?
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Who might struggle with overdenture use?
Who might struggle with overdenture use?
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What are some practical considerations for overdentures?
What are some practical considerations for overdentures?
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When might overdentures not be the ideal choice?
When might overdentures not be the ideal choice?
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What can hinder the success of overdentures?
What can hinder the success of overdentures?
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What is a major advantage of overdentures?
What is a major advantage of overdentures?
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How do overdentures provide additional support?
How do overdentures provide additional support?
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Describe a non-coping abutment.
Describe a non-coping abutment.
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What is an abutment with coping preparation?
What is an abutment with coping preparation?
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What are abutments with attachments?
What are abutments with attachments?
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What are submerged vital roots?
What are submerged vital roots?
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What is modification and reduction in abutment preparation?
What is modification and reduction in abutment preparation?
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What is cast coping preparation?
What is cast coping preparation?
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What is endodontic therapy in abutment preparation?
What is endodontic therapy in abutment preparation?
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What are retentive elements?
What are retentive elements?
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What is the one-stage technique with supporting element?
What is the one-stage technique with supporting element?
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What is the one-stage technique with existing retentive element?
What is the one-stage technique with existing retentive element?
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How does record base construction differ for tooth-supported overdentures?
How does record base construction differ for tooth-supported overdentures?
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What are the main criteria for denture base design?
What are the main criteria for denture base design?
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What is an advantage of uncovered denture bases?
What is an advantage of uncovered denture bases?
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How does base design address suction?
How does base design address suction?
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What are the potential disadvantages of covered bases?
What are the potential disadvantages of covered bases?
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Study Notes
Overdentures Overview
- An overdenture is a removable dental prosthesis that covers one or more remaining natural teeth, their roots, or dental implants.
- Also known as overlay denture, overlay prosthesis, or superimposed prosthesis.
- Key goals include maintaining teeth as part of the residual ridge, decreasing bone resorption, retaining proprioception, and enhancing patient manipulation skills.
Indications for Overdentures
- Suitable when few remaining teeth are present and are unsuitable for fixed/removable partial dentures.
- Effective in cases with unhealthy periodontal conditions of remaining teeth.
- Beneficial for patients with Class II or Class III Angle's classification for improved aesthetics and masticatory function.
- Useful for patients with large maxillary or mandibular bone defects.
- Serves as an alternative to single dentures opposing a few natural teeth.
- Ideal for patients with congenital defects (like cleft palate, microdontia).
Contraindications for Overdentures
- Poor oral hygiene may affect success.
- Inadequate inter-arch space cannot accommodate the denture.
- Mentally or physically handicapped patients may struggle with overdentures.
- Cost and time considerations can be a barrier.
- When other treatments offer better outcomes.
- Lack of patient acceptance can lead to poor compliance.
Advantages of Overdenture Prosthesis
- Preserves the remaining residual ridge by decreasing bone resorption.
- Retains abutment teeth as part of the residual ridge for additional support.
Types of Abutments
- Non-coping Abutment: Tooth is reduced to a height of 2-3 mm, endodontically treated, and filled with amalgam or composite.
- Abutments with Coping Preparation: Includes short (2-3 mm) and long (5-8 mm) cast copings, potentially requiring endodontic treatment.
- Abutments with Attachment: Utilizes small precision devices to improve retention, consisting of male and female components.
- Submerged Vital Roots: A method involving transected roots reduced to 2 mm below the crestal bone covered by a flap, although it carries risks of infection and dehiscence.
Abutment Preparation Techniques
- Modification and Reduction: Reshape teeth to remove undercuts and reduce vertical height.
- Cast Coping Preparation: Reduces sensitivity, ensuring adequate bony support without endodontic treatment.
- Endodontic Therapy Options: Includes amalgam plugs and cast coping, offering retention through post-and-coping systems.
- Use of Retentive Elements: Incorporating attachments for overdentures can simulate fixed bridges and provide stability.
Impression Techniques
- One-Stage Technique with Supporting Element: Full-arch impressions taken after abutment preparation.
- One-Stage Technique with Existing Retentive Element: Involves full-arch impressions using transfer matrices for incorporated retentive elements.
Record Base Construction
- Design differences for tooth-supported overdentures versus conventional ones involve metal bearing incorporation and ensuring abutment regions remain uncovered.
Denture Base Design Criteria
- Should minimize plaque accumulation, avoid mechanical trauma to gingiva, and enable effective oral hygiene.
- The design must accommodate normal tongue, lip, and cheek functions and maintain aesthetic appearance and speech.
Base Design Considerations
- Uncovered bases lead to fewer complications, promoting better hygiene.
- Direct mechanical trauma is prevented, reducing plaque retention and allowing better access to clean abutment surfaces.
- Overdenture designs should minimize suction effects, especially in maxillary applications.
Key Disadvantages of Covered Bases
- Increase risk of plaque accumulation, mechanical trauma, and can lead to hyperplastic proliferative conditions due to poor hygiene.
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Description
This quiz covers the key aspects of overdentures, including their definition, indications, and contraindications. Learn about their benefits in dental prosthetics, particularly for patients with few remaining teeth and specific dental conditions. Test your knowledge on maintaining oral health and improving aesthetics with overdentures.
