Temporary and Permanent Restorations Practice Questions
20 free Temporary and Permanent Restorations practice questions for the CDA. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
What is the main purpose of placing a temporary restoration after tooth preparation?
- A To restore full function and aesthetics permanently and quite definitively
- B To protect the tooth and prevent sensitivity until the final restoration
- C To bond the eventual final restoration much more strongly to dentine
- D To remove the need for any further follow-up dental appointment
Correct answer: To protect the tooth and prevent sensitivity until the final restoration
Temporary restorations protect the prepared tooth, preserve occlusal and interproximal contacts, prevent sensitivity, and maintain proper tooth position while the permanent restoration is being fabricated. They are not intended for long-term function.
Which material is commonly used for fabricating a temporary crown chair-side?
- A Porcelain fused to metal
- B Bis-acrylic composite resin or acrylic resin
- C Gold alloy
- D Ceramic zirconia
Correct answer: Bis-acrylic composite resin or acrylic resin
Temporary crowns are often made from bis-acrylic composite or acrylic resin materials, which allow for quick, chair-side fabrication and adequate protection until the definitive crown is ready.
How long is a typical temporary restoration expected to function before replacement by a permanent restoration?
- A Several years if maintained well
- B A few days only
- C A few weeks to a few months
- D Indefinitely, if no complications arise
Correct answer: A few weeks to a few months
Temporary restorations are designed for short-term use, typically lasting a few weeks to a few months until the permanent restoration is fabricated and seated.
Which cementation material is most suitable for temporary crowns to allow easy removal later?
- A Strong resin cement
- B Glass ionomer permanent cement
- C Zinc-oxide eugenol (ZOE) or other temporary luting cement
- D Zinc phosphate permanent cement
Correct answer: Zinc-oxide eugenol (ZOE) or other temporary luting cement
Temporary luting cements such as zinc-oxide eugenol allow adequate retention for provisional restorations yet permit easy removal when the permanent restoration is ready. Strong permanent cements would make removal difficult.
Which of the following is NOT a function of a temporary restoration or provisional crown?
- A Maintain tooth position and correct occlusal relationships during healing
- B Protect the pulp and dentine from thermal and chemical insult
- C Provide long-term aesthetics indistinguishable from natural teeth
- D Prevent coronal leakage and bacterial ingress into the tooth
Correct answer: Provide long-term aesthetics indistinguishable from natural teeth
Temporary restorations often have inferior aesthetics compared to final restorations. Their main role is protection, function, and maintenance of tooth structure meanwhile — not ideal long-term appearance.
Which scenario most strongly indicates the need for a permanent restoration rather than a temporary one?
- A Waiting for lab fabrication of a crown over several weeks
- B Patient with deep cavity needing only interim protection
- C After final tooth preparation and impressions when the permanent crown is ready
- D After initial pulpal treatment but before final restoration
Correct answer: After final tooth preparation and impressions when the permanent crown is ready
Once the definitive restoration (crown, inlay/onlay, etc.) is fabricated and checked for fit, a permanent restoration should be placed to provide long-term function, strength, and aesthetics. Temporary restorations are only for interim protection.
Why might a dentist choose an indirect permanent restoration over a direct permanent filling for a large restoration area?
- A Indirect restorations are cheaper and quicker than a direct filling
- B They are made outside the mouth, giving better strength and fit
- C Indirect restorations do not require any impression to be taken
- D Indirect restorations always avoid the need for tooth preparation
Correct answer: They are made outside the mouth, giving better strength and fit
Indirect restorations, fabricated in a laboratory (or milled), are often preferred for large or complex defects because they provide superior physical properties, fit, and longevity compared to direct fillings applied in one visit.
Which restorative material is LEAST likely to be used for a permanent definitive restoration?
- A Porcelain or ceramic crown
- B Metal-ceramic crown
- C Stainless-steel crown in adult posterior teeth
- D Composite or amalgam filling in small cavity
Correct answer: Stainless-steel crown in adult posterior teeth
Stainless-steel crowns are generally used as temporaries or for pediatric patients; they are rarely used as permanent restorations in adult posterior teeth due to poor long-term durability and aesthetics. The others are standard options for permanent restorations.
What is a key disadvantage of leaving a temporary restoration in place for longer than intended period?
- A It will bond too strongly to tooth structure
- B It may loosen, wear down, break or allow bacterial ingress, risking sensitivity or decay
- C It becomes more durable over time
- D It automatically converts into a permanent restoration
Correct answer: It may loosen, wear down, break or allow bacterial ingress, risking sensitivity or decay
Temporary restorations are not meant for long-term function; prolonged use may lead to loosening or breakdown, gap formation, microleakage, risk of fracture or bacterial penetration, compromising tooth health.
Which type of final restoration would most likely require taking impressions and lab fabrication before placement?
- A Small direct composite filling
- B Direct glass ionomer restoration
- C Full-coverage crown or onlay
- D Temporary filling with zinc oxide eugenol
Correct answer: Full-coverage crown or onlay
Full-coverage crowns or onlays are indirect restorations that require impressions, lab fabrication or milling, and a separate appointment for cementation — unlike direct fillings which are done chair-side in one visit.
What is the main purpose of a permanent restoration compared to a temporary one?
- A To provide short-term protection while waiting for lab work
- B To restore long-term function, form, aesthetics, and protect tooth structure permanently
- C To be easily removable by patient
- D To test occlusion only
Correct answer: To restore long-term function, form, aesthetics, and protect tooth structure permanently
Permanent restorations are designed to restore the tooth’s function, aesthetics, strength, and structure for long-term use — replacing temporary restorations once they serve their interim role.
Which is a common indication for using a temporary restoration rather than placing a permanent one immediately?
- A The permanent restoration is ready in the same visit
- B The tooth requires pulpal therapy or multiple staged treatment
- C The patient refuses treatment
- D The cavity is small and superficial
Correct answer: The tooth requires pulpal therapy or multiple staged treatment
Temporary restorations are indicated when a tooth needs staged treatment (e.g., endodontic therapy, lab-fabricated indirect restoration), providing protection until definitive restoration is feasible.
Which characteristic is expected to be higher for a permanent restoration than a temporary one?
- A Ease of removal
- B Marginal leakage risk
- C Durability and resistance to occlusal forces
- D Need for frequent replacement
Correct answer: Durability and resistance to occlusal forces
Permanent restorations are fabricated with durable materials and designed to withstand occlusal forces over long periods, unlike temporary restorations which are meant for short-term protection.
What is the risk of using a temporary cement containing eugenol if a permanent resin-based restoration is planned?
- A No risk; eugenol helps polymerization
- B Eugenol can inhibit polymerization of resin, compromising bond strength
- C Eugenol strengthens the resin bond
- D Eugenol permanently stains tooth structure
Correct answer: Eugenol can inhibit polymerization of resin, compromising bond strength
Eugenol-containing temporary cements may penetrate dentin and inhibit the polymerization of resin-based materials, reducing bond strength when placing permanent resin restorations.
Which of the following describes an advantage of indirect permanent restorations over direct restorations for large or complex defects?
- A They require no impressions or scans to be taken beforehand
- B They can be completed comfortably within a single chair-side visit
- C They give better fit, strength and occlusal control after lab work
- D They are almost always cheaper than an equivalent direct restoration
Correct answer: They give better fit, strength and occlusal control after lab work
Indirect restorations are made in a lab based on precise impressions (or digital scans), allowing superior fit, structural strength, and occlusal accuracy — especially beneficial for large or complex restorative needs.
Which of the following is true regarding care instructions for a patient with a temporary crown?
- A Chewing hard or sticky foods is safe
- B No special hygiene or care is needed
- C Avoid sticky or hard foods and brush gently around margins
- D Use abrasive toothpaste to clean the temporary crown
Correct answer: Avoid sticky or hard foods and brush gently around margins
Temporary crowns are more prone to dislodgement or fracture — patients should avoid sticky or hard foods and clean gently to maintain restoration integrity until permanent crown placement.
Which of the following is a potential consequence of leaving a temporary restoration in place much longer than recommended?
- A Improved enamel remineralization
- B Better adaptation of final restoration
- C Increased risk of restoration breakdown, leakage, and tooth sensitivity or decay
- D Stronger bond for final restoration
Correct answer: Increased risk of restoration breakdown, leakage, and tooth sensitivity or decay
Extended use of temporary restorations can lead to material wear, loss of marginal seal, micro-leakage, and increased risk of sensitivity or recurrent decay.
What is the role of a provisional (temporary) bridge in restorative treatment planning?
- A To serve as the final restoration permanently
- B To stabilize prepared teeth, maintain occlusion and aesthetics while final bridge is being fabricated
- C To immediately replace missing teeth permanently
- D To eliminate the need for future implant placement
Correct answer: To stabilize prepared teeth, maintain occlusion and aesthetics while final bridge is being fabricated
A provisional bridge maintains tooth position, occlusion, and appearance temporarily while the permanent prosthesis is fabricated, helping stabilize tissues and allow for multi-stage treatment.
Which type of permanent restoration would be indicated when a tooth is severely damaged, requiring full coverage and reinforcement?
- A Direct composite filling
- B Temporary resin filling
- C Full-coverage crown or onlay fabricated in a lab
- D Provisional acrylic crown
Correct answer: Full-coverage crown or onlay fabricated in a lab
When a tooth is badly damaged or structurally compromised, a lab-fabricated full-coverage crown or onlay offers maximum reinforcement, protection, and longevity compared to direct or provisional restorations.
Which statement best summarizes the difference between temporary and permanent restorations?
- A Temporary restorations are stronger and more aesthetic than permanent ones
- B Permanent restorations last long term; temporary ones are interim
- C Temporary restorations need no follow-up, while permanent ones do
- D There is essentially no meaningful difference between the two types
Correct answer: Permanent restorations last long term; temporary ones are interim
Permanent restorations are intended to restore full function, strength, and appearance over a long term, whereas temporary restorations offer interim protection and function until definitive treatment is completed.