Dental Restorations and Bridge Design Quiz

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Questions and Answers

What type of bridge is preferred for long-span applications?

Suspension bridge

Cantilever bridge

Arch bridge

Fixed-fixed bridge (correct)

What is the primary function of resistance in a restoration?

To facilitate easy removal for adjustments

To prevent dislodgement along the path of placement

To enhance the aesthetic appeal of the restoration

To ensure stability against dislodgement in non-placement directions (correct)

Which of the following is a primary benefit of fixed bridges?

Increasing the size of the dental arch

Enhancing chewing efficiency

Correcting abnormal oral conditions (correct)

Providing temporary solutions for dental issues

Which of the following best describes a fixed-fixed bridge?

It uses a rigid connector at both ends of the pontic. Signup and view all the answers

What components make up a prosthesis as discussed?

A fixed and a removable component Signup and view all the answers

How does resistance contribute to the overall effectiveness of a restoration?

It minimizes the impact of external forces on the restoration Signup and view all the answers

In what way does stability in a restoration affect dental health?

It ensures that the restoration remains functional and prevents further oral issues Signup and view all the answers

What connector types are referenced in basic bridge designs?

Rigid connectors at both ends Signup and view all the answers

What is a key characteristic of the fixed-fixed bridge design?

It has a rigid connector at both ends. Signup and view all the answers

Which statement about resistance in restorations is incorrect?

Resistance is only important during the initial placement Signup and view all the answers

What is a major reason not to use certain procedures for the lower arch?

The sub-mucosal tissue is unstable. Signup and view all the answers

What potential issue is associated with procedures in the lower arch?

Plaque and calculus deposition. Signup and view all the answers

For which connector designs are lower arch procedures generally advised against?

Basic bridge designs. Signup and view all the answers

Which factor contributes to the difficulty of lower arch procedures?

Tissue stability concerns. Signup and view all the answers

What impact does plaque and calculus deposition have on dental procedures?

It poses a risk for periodontal disease. Signup and view all the answers

What is a significant challenge when treating an uncooperative patient?

Difficulty in achieving satisfactory results. Signup and view all the answers

Why might fixed partial dentures (FPDs) be less favorable compared to removable partial dentures (RPDs)?

FPDs are more expensive than RPDs. Signup and view all the answers

What impact does a social problem have on the decision to use fixed partial dentures?

It may lead to choosing RPDs over FPDs due to cost. Signup and view all the answers

What is an essential consideration before deciding on the type of denture to use?

The level of cooperation of the patient. Signup and view all the answers

How does the uncooperative nature of a patient impact the treatment approach?

Complicates the ability to achieve satisfactory results. Signup and view all the answers

What feature characterizes a spring cantilever bridge design?

The pontic attaches to a flexible bar that runs into the palate. Signup and view all the answers

In a spring cantilever design, where does the flexible bar terminate?

With a rigid connector on the palatal side. Signup and view all the answers

Which teeth are typically involved in a spring cantilever bridge design with the pontic?

Upper 4 or a pair of upper 4 and 5. Signup and view all the answers

What is the primary function of the rigid connector in a spring cantilever design?

To secure the flexible bar in place. Signup and view all the answers

Which statement is true regarding the flexible bar in a spring cantilever bridge design?

It allows movement of the pontic into the palate. Signup and view all the answers

What is a characteristic of a simple cantilever bridge design?

The support is provided at only one end. Signup and view all the answers

Which statement is true regarding the pontic in a simple cantilever bridge?

The pontic may attach to one or two retainers. Signup and view all the answers

In a simple cantilever bridge, where can the abutment tooth be located?

Either mesial or distal to the span. Signup and view all the answers

Which of the following is NOT a feature of a simple cantilever bridge?

It has multiple points of anchorage. Signup and view all the answers

What describes the relationship of a simple cantilever bridge and its retainers?

The pontic can have minimal connective support to its retainers. Signup and view all the answers

Study Notes

Fixed Partial Denture (Bridge)

A prosthetic appliance used to replace one or more missing teeth, definitively attached to remaining teeth.
Key components include:
- Bridge: The entire appliance.
- Retention: Prevents removal along the insertion path.
- Support: The abutment teeth's ability to bear occlusal loads.
- Resistance: The restoration's stability against dislodgement.

Purposes (Benefits) of Fixed Bridges

Correct abnormal oral conditions.
Restore mastication for full functional efficiency.
Maintain the health of remaining teeth and prevent further injury.
Restore appearance and aesthetics.

Indications (General)

Psychological: FPDs are better tolerated compared to RPDs (especially for patients with conditions like epilepsy)
Systemic: Conditions like epilepsy, where FPDs offer better strength and retention than RPDs.
Orthodontic: Useful for stabilizing orthodontic treatment outcomes, especially when replacing missing lateral incisors after correcting diastema.
Speech: FPDs offer a more comfortable fit, leading to reduced speech difficulty compared to bulky RPDs
Periodontal: Stabilize teeth with minor mobility, preventing further movement and bone loss. Ensures mastication forces distribute correctly rather than overloading the tissues.
Age: Recommended after 18, especially for the posterior region, in order to aid resilience of the periodontal tissue and address issues with fully erupted teeth.

Indications (Local)

Healthy Abutments: Vital, adequately treated, and healthy teeth, with good crown-root ratios, periodontal health, and root configurations/angles.
Suitable Abutment Teeth: Teeth adjacent to the edentulous space that require restoration.
Unfavorable Abutment Angles: Useful to address severely tilted teeth, inappropriate for removable prostheses.

Contraindications (General)

Uncooperative Patient: Difficulty reaching satisfactory results due to patient preferences.
Social Problem: Patients may have difficulty with the more expensive cost of FPDs, or be unsatisfied with the final results.
Occupation: Certain jobs, such as those involving contact sports, might not be suitable for FPDs due to the risk of fractures.
Oral Hygiene: Poor oral hygiene is a contraindication as it may indicate a bad attitude towards dentistry, and may result to the patient not being sufficiently motivated for the treatment.

Contraindications (Local)

Absence of Distal Abutment: Missing abutment at the distal area of the mouth, causing poor stabilisation of the prosthetic appliance.
Considerable Bone Loss: Extensive bone loss in visible areas compromise the placement of dental bridges.
Long Span: Bridges spanning across multiple missing teeth are more complicated and complex to implement
Abutment Issues: Problems affecting the length, shape, caries, and periodontal support of the abutment teeth.

Advantages of Fixed Bridges

Improved appearance and speech.
Maintain occlusal stability.
Provide periodontal splinting.
Restore occlusal vertical dimension.

Disadvantages of Fixed Bridges

Can induce tooth and pulp damage.
Potential for secondary caries.
Potential periodontal problems.
High cost.

Comparison & Advantages of Fixed Bridges over RPDs

More stable and comfortable (no acrylic base, flanges, or clasps)
Improved aesthetics
More stable occlusion (more uniform distribution of forces)
Provide splinting action to limit tooth mobility.
Easier cleaning (no removal for cleaning)
No irritation of tissues and/or pressure on tissues
Psychological advantages (more comfort than removable ones)

Classification of Dental Bridges

Material based: Cast Metal, All-ceramic, Metal ceramic, Resin-veneered
Location based: Anterior, Posterior
Number of teeth based: Two units, Three units
Tooth Reduction: Conventional (substantial reduction), Minimal (less reduction)
Connectors: Fixed-fixed, Fixed-movable, simple cantilever, spring cantilever, or combination (complex/compound)
Removable: Bridges that are supported by teeth, but can also be removed.

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Description

This quiz covers key concepts related to dental restorations and bridge designs, focusing on types of bridges, resistance, stability, and other relevant components. It will test your understanding of the principles and benefits associated with various dental procedures and designs.