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Questions and Answers
What is a disadvantage of high frenal attachment in dental appliances?
What is a disadvantage of high frenal attachment in dental appliances?
- It facilitates better esthetics.
- It stabilizes periodontally weakened teeth.
- It limits space for a lingual bar. (correct)
- It enhances retention support.
Which of the following is a consequence of non-utilization of the cleansing action of saliva in dental applications?
Which of the following is a consequence of non-utilization of the cleansing action of saliva in dental applications?
- Enhanced esthetic consideration.
- Increased comfort during use.
- Decreased risk of caries and periodontal disease.
- Reduced physiologic stimulation from food. (correct)
In which case is an interrupted lingual plate used?
In which case is an interrupted lingual plate used?
- To provide additional retention support.
- When there are minor interdental spaces.
- To increase the occlusal stability.
- When large interdental spaces make it unsightly. (correct)
What is a potential risk if a dental appliance is not properly designed?
What is a potential risk if a dental appliance is not properly designed?
What primary function does a double lingual bar serve?
What primary function does a double lingual bar serve?
Which condition would require a dental practitioner to consider the use of a terminal rest?
Which condition would require a dental practitioner to consider the use of a terminal rest?
How does a high tendency for calculus formation affect dental appliance design?
How does a high tendency for calculus formation affect dental appliance design?
Which of the following indicates a potential complication in the presence of bony and tissue undercut?
Which of the following indicates a potential complication in the presence of bony and tissue undercut?
What is the simplest type of mandibular major connector?
What is the simplest type of mandibular major connector?
Which condition indicates the use of a lingual bar instead of a lingual plate?
Which condition indicates the use of a lingual bar instead of a lingual plate?
What configuration should a lingual bar ideally have in cross-section?
What configuration should a lingual bar ideally have in cross-section?
What is the appropriate space from the lingual frenum to utilize a lingual bar?
What is the appropriate space from the lingual frenum to utilize a lingual bar?
In which scenario would a lingual plate be preferred over a lingual bar?
In which scenario would a lingual plate be preferred over a lingual bar?
What type of force can a lingual torus create against a major connector?
What type of force can a lingual torus create against a major connector?
What should be the design consideration for the upper anterior border of a lingual plate?
What should be the design consideration for the upper anterior border of a lingual plate?
Which of the following is a contraindication for the use of a lingual bar?
Which of the following is a contraindication for the use of a lingual bar?
What is the primary benefit of using a palatal strap connector?
What is the primary benefit of using a palatal strap connector?
In which scenario is a double palatal connector recommended?
In which scenario is a double palatal connector recommended?
What is a key feature of the palatal horseshoe connector?
What is a key feature of the palatal horseshoe connector?
What is the recommended anterior strap width for a double palatal connector?
What is the recommended anterior strap width for a double palatal connector?
What factor is considered when determining the width of a palatal strap?
What factor is considered when determining the width of a palatal strap?
What is an important consideration for patients regarding the palatal horsehoe design?
What is an important consideration for patients regarding the palatal horsehoe design?
What should be avoided when designing the anterior border of a palatal horseshoe?
What should be avoided when designing the anterior border of a palatal horseshoe?
Why might a dental professional choose a double palatal connector in certain cases?
Why might a dental professional choose a double palatal connector in certain cases?
What is the function of the gingival relief area in a palatal connector?
What is the function of the gingival relief area in a palatal connector?
Which condition is NOT an indication for using a palatal horseshoe connector?
Which condition is NOT an indication for using a palatal horseshoe connector?
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Study Notes
High Frenal Attachment and Lingual Bar Considerations
- High frenal attachment limits space for lingual bars, requiring careful design.
- Terminal rests must be placed on occlusal, lingual, or incisal surfaces for stability.
- Essential for support against horizontal rotation, enhancing retention and patient comfort.
- Preserves oral tissue health and provides aesthetic benefits.
- Commonly applied in Class I and II conditions with significant vertical resorption of residual ridges.
- Stabilizes periodontally weakened anterior teeth and aids patients with high calculus formation.
- Utilizes interrupted lingual plate for spacing issues (diastema), redirecting food impact away from interproximal areas.
Double Lingual Bar Features
- Known as the Kennedy bar or split bar, also termed as a continuous lingual bar.
- Requires at least 7-8mm of space between the alveololingual sulcus and gingival crevices.
- Helps to manage bony and tissue undercuts effectively.
Maxillary Major Connectors
- Types include palatal strap, double palatal bar, horseshoe (U-shaped), and full palatal coverage.
- Palatal strap is the most versatile, catering to varying edentulous spans and ensuring minimal speech interference.
- In cases requiring support, designs should maximize rigidity while being unobtrusive to tongue movement.
Palatal Strap Specifications
- Suitable for Class III edentulous areas and long spans with tooth-bounded edentulous areas.
- Emphasizes wide and thin configurations for optimal rigidity and discreetness.
- Anterior strap should measure 8-10mm, lateral strap 7-9mm, and posterior strap 4-7mm.
Palatal Horseshoe Indications
- Ideal for replacing several anterior teeth and conditions involving torus palatinus.
- The presence of periodontally weakened teeth or a deep palatal vault may necessitate this connector.
Complete Palatal Coverage
- Features a gingival relief area (pink line) to prevent food impaction, requiring a minimum 15mm window for effective function.
- The anterior border aligns with the depression and rugae slopes, while the posterior bar should reach the hamular notch.
Lingual Bar Characteristics
- The most common mandibular major connector; simple in design.
- Best suited for cases requiring no indirect retention with sufficient space (8-10mm) between the sulcus and gingival tissue.
Contraindications for Lingual Bar
- Not suitable for patients with a high lingual frenal attachment, elevated floor of the mouth, or lingual tori due to potential impingement.
Mandibular Major Connectors Variety
- Includes lingual bar, lingual plate, double lingual bar, and labial bar.
- The lingual plate is important for indirect retention and is ideally positioned on the middle third of the lingual surface of anterior teeth.
Configuration for Beading
- A half pear shape in cross-section with the upper borders lightly beaded for better mucosal contact, creating a shallow 0.5mm depression.
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