Dental Bridges and Restorations Quiz

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Questions and Answers

What is a fixed-moveable bridge designed to provide?

No movement at all

Complete rigidity

Minimal flexibility

Some degree of flexibility (correct)

Which type of bridge uses retaining teeth that are positioned on one side of the pontic only?

Cantilever bridge (correct)

Spring cantilever bridge

Fixed-fixed bridge

Adhesive bridge

For which situation would an adhesive bridge be especially advisable?

When the patient has multiple missing teeth

When additional space is required for braces

When there are concerns about the health of the abutment teeth (correct)

When the abutment teeth are healthy

What is a key reason fixed-fixed bridges might be less frequently used today?

Their rigidity can damage retaining teeth (C) Signup and view all the answers

What is a requirement for occlusal force considerations when replacing posterior teeth?

Full crown retainers are generally required (D) Signup and view all the answers

Why are adhesive bridges preferred in many cases?

They require minimal tooth preparation (D) Signup and view all the answers

When natural spaces exist between teeth, which type of bridge should be used?

Spring cantilever design (C) Signup and view all the answers

What type of material is generally not used for anterior bridges?

All-metal materials (D) Signup and view all the answers

What is the purpose of trimming polycarbonate crown forms before fitting them?

To ensure a perfect fit on the tooth (B) Signup and view all the answers

What is a key feature of the Hall technique for managing caries in deciduous molars?

It isolates caries bacteria under a crown (A) Signup and view all the answers

Why are prefabricated metal crowns predominantly replaced by aesthetic temporary crowns?

Patients prefer a more natural appearance (A) Signup and view all the answers

What materials can be used for cementing trimmed prefabricated temporary crowns?

Both temporary cement and shrink-fit materials (A) Signup and view all the answers

What is the composition of a conventional dental bridge?

Several crowns joined together (C) Signup and view all the answers

What restoration does the Hall technique primarily utilize?

Preformed metal crowns (PMCs) (D) Signup and view all the answers

What is a major benefit of the Hall technique for young patients?

It avoids the need for local anesthetics (C) Signup and view all the answers

What is generally true about stainless steel crown forms for posterior teeth?

They are often used for caries management (B) Signup and view all the answers

What is the primary purpose of using superfloss?

To clean plaque off the retainer area (C) Signup and view all the answers

In which situation is a veneer most suitable?

To mask a discolored tooth (C) Signup and view all the answers

What is a characteristic of porcelain veneers?

They are fragile once constructed (B) Signup and view all the answers

Why may veneers be preferred over conventional crowns in younger patients?

They require less enamel removal (B) Signup and view all the answers

Which tool has been recommended for cleaning under the pontic besides superfloss?

Interdental brush (A) Signup and view all the answers

What is a common reason for a tooth to require a veneer?

To mask poorly shaped teeth (B) Signup and view all the answers

What has largely superseded the use of veneers for achieving a lighter labial segment?

Tooth whitening techniques (B) Signup and view all the answers

What is true regarding the preparation for veneers?

It involves minimal removal of dentine (C) Signup and view all the answers

What is the recommended patient profile for suitable cases to receive adhesive bridges?

Younger patients with minimal or open bite (D) Signup and view all the answers

What feature of the adhesive bridges makes them suitable for use in posterior cases?

Lower occlusal forces when opposing teeth are dentures (C) Signup and view all the answers

Which material is commonly used for creating the luting cement in adhesive bridges?

Panavia Ex (C) Signup and view all the answers

What preparation technique enhances the retention of the adhesive bridge flanges?

Acid etching and sand blasting (C) Signup and view all the answers

Why is a temporary bridge necessary during the transition to a permanent bridge?

To prevent tooth sensitivity and space closure (B) Signup and view all the answers

What is the initial material used to fill the gap of the missing tooth before taking an impression for a temporary bridge?

Cotton wool roll (B) Signup and view all the answers

What type of impression is taken after preparing the abutment teeth for a permanent bridge?

Second impression for the permanent bridge (C) Signup and view all the answers

What happens to the first impression used for constructing the temporary bridge?

It is used to make the temporary bridge. (A) Signup and view all the answers

What is the primary purpose of applying a silane agent on the fitting surface of the veneer?

To chemically bond the luting cement for good adhesion (B) Signup and view all the answers

Which material is NOT typically used for construction of inlays?

Ceramic resin (A) Signup and view all the answers

Why are inlays considered stronger than conventional fillings?

They are constructed indirectly in a laboratory. (A) Signup and view all the answers

What should be done to excess cement on the veneer before full light curing?

Carefully remove it without disturbing the veneer (A) Signup and view all the answers

Which situation would most likely benefit from the use of an inlay?

A tooth that has lost cusps and undergoes heavy occlusal forces (C) Signup and view all the answers

What has contributed to the reduction in the general usage of indirect composite inlay techniques?

The improvement of direct composite materials and techniques (C) Signup and view all the answers

What is a common consequence of leaving flecks of cement trapped interproximally?

They act as stagnation areas and can hold plaque (A) Signup and view all the answers

In what situation are gold alloy inlays being provided less frequently?

In anterior cavities due to aesthetic preferences (B) Signup and view all the answers

What are the primary materials used in the construction of full and partial dentures?

Pink or transparent acrylic (B) Signup and view all the answers

What is the process called that turns the mixed polymer and monomer into hard acrylic?

Curing (D) Signup and view all the answers

Which method of curing acrylic is typically used for permanent dentures?

Heat curing (A) Signup and view all the answers

What aids in the retention of dentures in the patient's mouth during activities like speech and chewing?

Saliva suction film (C) Signup and view all the answers

What is the purpose of a post-dam in an upper denture?

To assist in suction film development (A) Signup and view all the answers

Which type of acrylic is suitable for chairside use by dentists to make temporary crowns?

Cold-cured acrylic (D) Signup and view all the answers

What factor is NOT relevant to the retention of partial dentures?

The patient's emotional state (A) Signup and view all the answers

In what way do stainless steel clasps assist in the retention of partial dentures?

By preventing dislodgment due to tissue movement (C) Signup and view all the answers

Study Notes

Prosthodontics

Prosthodontics is the branch of dentistry that restores or replaces damaged or missing teeth using artificial devices.
Key areas of prosthodontic techniques include restoring a damaged tooth and replacing a missing tooth.
Practical knowledge of impression materials and techniques, fixed and removable prosthodontic techniques, and dental appliances is crucial.
A factual awareness of other removable prosthetic procedures, fixed and removable orthodontic appliances, and the use of dental implants in tooth replacement is needed.
Restorations can be permanently cemented to existing teeth (fixed prostheses).
Removable prostheses are those which can be taken out of the mouth by the patient.

Impression Materials

Impression materials must be easily mixed, cost-effective, have an adequate working time prior to setting and a relatively short setting time.
Materials must accurately record tooth details and be stable when set and elastic enough to allow the impression to be removed from the mouth without tearing.
Irreversible hydrocolloids (alginate), addition silicones and vinyl polysiloxanes, and polyethers are the commonly used types of elastic impression materials .
Alginate is the most common impression material. It's easy to mix and relatively inexpensive. Alginate can be used to produce models for constructing crowns, bridges, inlays, veneers, and dentures and is for reproduction of models from a single impression.
Addition silicones are accurate and highly accurate, suitable for fixed and some removable prosthetic work. Different mixing techniques are utilized as well as different preparation.
Polyethersare highly accurate, for fixed and removable prosthetics. They have similar setting times to silicones but set more firmly and do not change dimensions with moisture.

Procedures and Materials

Procedures for taking impressions for dentures and other restorations include mixing materials and placing them in appropriate trays.
Preparing a tooth for a crown or bridge restoration involves reducing the tooth's size using burs.
The working models may require a face bow for correct tooth alignment.
Temporary restorations (e.g., crowns, bridges) are fabricated to maintain the appearance and prevent sensitivity.
Materials such as alginate, elastomers, alloys, and composites are used to fabricate restorations.
Several techniques may be used for preparation and construction of fixed prosthetics, including the use of different types of burs, materials, and impression techniques.

Additional Notes

Various types of fixed prostheses (e.g., crowns, bridges, inlays, veneers) are cemented onto existing teeth.
Specific considerations for selecting the appropriate prosthesis include tooth type, chewing forces, aesthetics, the patient's bite, and whether the restoration is temporary or permanent.
Procedures for preparing teeth for fixed prostheses involve removal of decay, shaping, and polishing.
Procedures for fabricating temporary restorations may vary depending on whether done in the lab or in the chair.
Additional equipment and materials needed for different prosthodontic procedures are outlined in tables.
Different types of removable prostheses (full dentures and partial dentures) are constructed mainly from acrylic, though some may also be made with a chrome-cobalt base.
Retention methods for dentures include adhesives, clasps and suction films.
Oral hygiene instructions after construction and placement of a prosthesis are discussed to prevent plaque build up and gingivitis.
Various types of crowns, e.g., all-ceramic, porcelain bonded, full gold, and three-quarter crowns are discussed in detail, along with considerations for tooth selection.

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Description

Test your knowledge on various types of dental bridges and their applications. This quiz covers fixed, adhesive, and prefabricated crowns, including their materials and techniques. Challenge yourself to understand the requirements and considerations in dental restorations.