Aesthetics

• Replacing anterior missing teeth with a bridge is often chosen for aesthetic reasons, enhancing the appearance of the patient’s smile and facial structure. Additionally, it helps in maintaining proper dental alignment and function. [Q0160]
• Maryland or Roche bridges generally have no detrimental color effect on abutment teeth, preserving the natural appearance of the adjacent teeth. These types of bridges are particularly useful in aesthetic zones. [Q0275]
• Restoring a labially displaced anterior tooth with a gold core porcelain jacket crown will make the crown appear narrow, ensuring a more harmonious alignment within the dental arch. This approach improves both function and aesthetics. [Q0334]
• Shade selection for crowns should be done before tooth preparation to ensure accurate matching, which is crucial for achieving a natural and aesthetically pleasing result. Proper shade selection can significantly enhance the overall appearance of the restoration. [Q0524]
• A feather edge is used in gingival preparation for a composite veneer to create a smooth transition between the veneer and the tooth, enhancing the aesthetic outcome. This technique helps in achieving a seamless and natural-looking restoration. [Q3065]
• A feathered edge is generally preferred at the gingival margins for composite veneers to create a smooth transition, which is essential for both aesthetic appeal and longevity of the restoration. This method minimizes visible margins and ensures a better fit. [Q3066]
• Compensating extraction involves removing the opposing tooth to maintain occlusal balance, which helps in preventing malocclusion and uneven wear of the remaining teeth. This approach is crucial for maintaining long-term dental health. [Q3507]

Design and Planning

• A fixed bridge using both the central incisor and bicuspid provides better support and distribution of forces in Class II Division II patients, ensuring a more stable and durable restoration. This method enhances both function and aesthetics. [Q0125]
• Using both premolars as abutments for a cantilever bridge provides adequate support for replacing a missing maxillary canine, ensuring stability and longevity of the restoration. This design helps in evenly distributing occlusal forces. [Q0158]
• A long edentulous span can lead to overloading and damage to the abutment teeth, contraindicating bridge work. It is essential to consider the span length to prevent complications and ensure the success of the restoration. [Q0875]
• The treatment approach for dental bridges depends on the specific clinical case, with options including fixed or removable bridges based on the patient’s needs. Proper assessment ensures the most suitable and effective treatment plan. [Q4266]
• Root canal treatment followed by a crown is a common and effective treatment for a cracked tooth, providing both structural support and protection. This approach helps in preserving the tooth and maintaining oral health. [Q4442]
• An implant-supported crown is the best restoration for a missing maxillary central incisor, offering superior aesthetics and functionality. This method provides a durable and natural-looking solution for tooth replacement. [Q4924]

Materials and Properties

• Inadequate condensation of the porcelain is the most common cause of porosity in porcelain jacket crowns, which can compromise the strength and aesthetics of the restoration. Proper technique is essential to avoid these issues. [Q0272]
• Metal-ceramic crowns require less palatal reduction compared to full ceramic crowns, making them a preferable option for restoring anterior teeth. This advantage helps in preserving more of the natural tooth structure. [Q0274]
• Stone dies may lack accurate reproduction of surface details, which is a major disadvantage in crown fabrication. This limitation can affect the fit and finish of the final restoration. [Q0299]
• Porcelain thinner than 1 mm is prone to breakage in jacket crowns, which underscores the importance of adequate material thickness for durability. Ensuring proper thickness helps in preventing fractures and prolonging the lifespan of the crown. [Q0332]
• Opacity in porcelain jacket crowns can occur if the porcelain layer is too thin over the opaque layer, affecting the aesthetic outcome. Proper layering techniques are essential to achieve a natural translucency. [Q0466]
• Nickel allergies are more common in females, so nickel chromium use should be carefully considered to avoid allergic reactions. Patient history should be reviewed to select appropriate materials. [Q0471]
• Reduced occlusal area means less stress on the restoration, reducing fracture potential. This consideration is important in planning restorations for high-stress areas like molars. [Q0713]
• Maryland bridges are typically made of nickel-chrome alloy, providing strength and durability necessary for long-term success. This material choice contributes to the bridge’s ability to withstand masticatory forces. [Q0738]
• The high casting shrinkage of porcelain makes it less suitable for long-span bridges, where precision fit is critical to avoid structural issues. Alternative materials may be considered for such cases. [Q0905]
• Pop off can be caused by too thick application of gold surface conditioner, contamination at the interface, or under firing the opaque layer, leading to bond failure. Careful attention to these factors can prevent such complications. [Q0949]
• Acrylic jackets can be used both as temporary and provisional crowns, offering flexibility in treatment planning. Their ease of use and adaptability make them suitable for various clinical situations. [Q3154]
• It depends on the amalgam type; high copper amalgams may allow for quicker core preparation, impacting the overall treatment timeline. Understanding material properties is crucial for effective clinical decision-making. [Q3221]
• Temporary cement is used for cementing temporary bridges, providing a secure yet reversible solution during the interim period of treatment. This allows for adjustments and replacements if needed. [Q3432]
• Resin cement is typically used for cantilever restorations due to its strong adhesive properties, ensuring a reliable bond and stability of the restoration. This choice enhances the longevity and performance of the prosthesis. [Q3433]
• Temporary cement is typically used for temporary crowns, offering ease of removal and re-cementation as necessary. Its properties make it suitable for short-term applications. [Q3435]
• Composite resin cement is used for veneers due to its strong bond and aesthetic properties, ensuring a natural appearance and durable attachment. Proper cement selection is crucial for the success of veneer restorations. [Q3436]
• Fluorosis is the most common cause of enamel staining, often resulting from excessive fluoride exposure during tooth development. This condition affects the aesthetics of the teeth and requires appropriate management. [Q3501]
• Porcelain-fused-to-metal crowns are commonly given for post-retained teeth, combining the strength of metal with the aesthetic appeal of porcelain. This type of crown provides a durable and visually pleasing solution. [Q3539]
• Silicone cures by chemical reaction, while acrylic resin cures by heat, each having distinct properties that suit different clinical applications. Understanding these differences is important for selecting the appropriate material. [Q3543]
• Empress crowns are full porcelain jacket crowns, offering excellent aesthetic qualities and a natural appearance. They are a popular choice for anterior restorations. [Q3665]
• The choice between metal crowns and metal-ceramic crowns depends on the clinical situation, considering factors like aesthetics, strength, and patient preference. Tailored decision-making ensures optimal outcomes. [Q4057]
• Stainless steel crowns are commonly used as temporary crowns and are likely to be retained, especially in pediatric dentistry. They provide a durable and cost-effective temporary solution. [Q4275]
• Luting cement is used to bond restorations to tooth structure, ensuring stability and longevity of the restoration. Proper cement selection is essential for successful dental procedures. [Q4279]
• Glass ionomer is the most suitable material for restoring root caries in xerostomia patients, offering both fluoride release and a strong bond to dentin. This choice helps in managing caries risk and maintaining oral health. [Q4361]
• Zinc oxide eugenol is the most commonly used temporary luting cement, providing good sealing properties and ease of removal. It is a reliable choice for temporary cementation needs. [Q4376]
• To be considered noble, a restoration must contain at least 25% noble metal, ensuring resistance to corrosion and biocompatibility. This classification influences material selection and patient outcomes. [Q4443]
• Glass ionomer cement is self-adhesive, while composite, resin-modified glass ionomer, and polyacid-modified composites typically require an adhesive, impacting the bonding protocols in restorative procedures. [Q4476]
• Palladium and silver are not the cheapest alloys; other alloys are typically cheaper, influencing the cost and selection of materials for metal ceramic crowns. Understanding material costs is important for treatment planning. [Q4509]
• Pins are generally contraindicated with GIC to avoid fracture, ensuring the longevity and integrity of the restoration. Proper material selection and technique are crucial for successful outcomes. [Q4618]
• Porcelain-fused-to-metal crowns (PMCs) are generally less expensive than all-ceramic crowns, making them a cost-effective option for patients. This consideration can influence treatment decisions. [Q4623]
• Methyl methacrylate is the main component in acrylic resin powder, used widely in denture base materials and provisional restorations. Its properties ensure durability and ease of manipulation. [Q4638]
• Precious metal alloys like platinum and gold are used in metal-ceramic crowns, providing strength, biocompatibility, and aesthetic appeal. These materials contribute to the longevity and success of the restorations. [Q4654]
• Both RMGIC and GIC are stronger than zinc phosphate cement for adhesive purposes, offering better bond strength and durability in crown cementation. This characteristic enhances the overall performance of the restoration. [Q4742]
• Hi-Ceram is typically an all-ceramic material, not involving a metal base, providing aesthetic advantages for anterior restorations. Its composition ensures a natural appearance and biocompatibility. [Q5040]
• Composite fillings are more likely to develop secondary caries compared to amalgam fillings due to their bonding properties and potential for marginal gaps. This risk should be considered in material selection. [Q5509]
• Amalgam is often considered the most useful material for molar fillings due to its strength and durability, especially in high-stress areas. It remains a reliable choice for posterior restorations. [Q5511]
• A gold crown is often chosen for a canine tooth with a large filling due to its durability and strength, providing long-lasting protection and function. This material choice ensures the longevity of the restoration. [Q5815]
• Bonded amalgam restorations are recommended when additional strength is needed, offering enhanced support and longevity in high-stress areas. This approach is beneficial for patients with significant occlusal forces. [Q5824]

Preparation and Fit

• Articulating paper is most effective for verifying occlusal clearance during an onlay preparation, ensuring proper bite alignment. This tool helps in identifying high spots that need adjustment. [Q0264]
• A 1.5 mm labial reduction is necessary to achieve satisfactory aesthetics for porcelain-fused-to-metal crowns, ensuring enough space for the material. This reduction enhances the final appearance of the restoration. [Q0276]
• If the crown casting does not fit properly, making a new impression and remaking the crown is the best approach. This ensures accurate fit and avoids potential complications with the gingival area. [Q0279]
• A pontic should be just in contact with soft tissues to allow for proper hygiene and comfort without causing tissue damage. This placement helps in maintaining healthy surrounding tissues. [Q0333]
• Placing the pin where there is the greatest thickness ensures maximum retention and stability for class II inlays. This technique provides better support and longevity for the restoration. [Q0336]
• Remaking the crown is the appropriate action if there is a significant margin discrepancy of 0.3mm at the margin. This ensures a proper fit and prevents potential periodontal issues. [Q0547]
• Whenever possible, the cervical finish line should be placed just supragingival for full veneer crown preparations. This placement helps in better gingival health and easier cleaning. [Q0814]
• If there is a 0.3mm discrepancy, a new impression and crown are needed to ensure a precise fit. Accurate impressions are crucial for successful crown placement. [Q0832]
• Contamination should be avoided between the preheat and opaque stages during the fabrication of porcelain fused to metal crowns. This ensures proper bonding and prevents defects. [Q0948]
• Ceramic veneers require significantly less enamel removal compared to full ceramic crowns, preserving more of the natural tooth structure. This minimally invasive approach is beneficial for patient comfort and tooth integrity. [Q3440]
• Ceramic veneers are usually luted using etch and light-curing cement to ensure strong adhesion and longevity. This method provides a secure bond and enhances the aesthetic outcome. [Q3441]
• Composite veneers usually require enamel preparation to ensure proper bonding, which is critical for the durability and effectiveness of the restoration. This preparation provides a suitable surface for adhesion. [Q3508]
• If a die fails to fit, the impression should be remade to ensure accuracy and proper fit of the final restoration. This step is essential to avoid misfits and potential clinical issues. [Q3604]
• In some cases, inlays or onlays are preferable over crowns for highly restored teeth, as they preserve more natural tooth structure. This choice depends on the extent of tooth damage and restoration needs. [Q3889]
• An ultrasonic cleaner is effective for cleaning a prosthodontic bridge before sending it to the lab, ensuring all residues are removed. This step is crucial for the quality of the final restoration. [Q3949]
• Whether a lining is needed before cementing a metal onlay depends on the depth of the preparation to protect the pulp. This decision is made to prevent post-operative sensitivity. [Q4089]
• If an inlay fails to fit, the preparation should be adjusted to ensure proper fit and function. This adjustment helps in achieving a better seating and longevity of the inlay. [Q4166]
• Beveling the edges of ceramic restorations generally provides better contour and fit, enhancing both the aesthetic and functional outcomes. This technique helps in achieving a seamless transition. [Q4199]
• Metal cast crowns typically require less tooth preparation than ceramic crowns, preserving more natural tooth structure. This advantage makes them suitable for cases where minimal reduction is preferred. [Q4327]
• Metal-ceramic crowns typically require more tissue removal from the buccal surface than full-thickness ceramic crowns, especially in front teeth. This preparation ensures sufficient space for the material. [Q4328]
• Metal-ceramic crowns do not typically require more tissue removal from the palatal and lingual surfaces than full-thickness ceramic crowns, maintaining more natural tooth structure in these areas. [Q4329]
• Shoulder margins are recommended for PFM and all-ceramic restorations due to better support and aesthetics, providing a stable base for the material. This margin design enhances the fit and appearance of the crown. [Q4661]
• Teeth with gross erosion on palatal surfaces are generally not indicated for porcelain jacket crowns due to the structural weakness. Alternative restorations may be more suitable for such cases. [Q4885]
• The angle between the prepared and unprepared surfaces in amalgam restoration is obtuse, ensuring adequate bulk of material at the margins. This design helps in withstanding occlusal forces. [Q4909]
• The angle between the prepared and unprepared surfaces in amalgam restoration is termed cervical, ensuring a proper seal and preventing marginal leakage. This angle is critical for the longevity of the restoration. [Q4910]
• A porcelain-fused-to-metal crown provides strength and aesthetic benefits, making it ideal for a tooth with a fractured cusp and an existing MOD amalgam filling. This type of crown offers a durable and visually pleasing solution. [Q5569]
• A crown is typically used for restoring a badly broken tooth, providing full coverage and protection. This restoration helps in maintaining the tooth’s function and appearance. [Q6038]

Retention and Stability

• A ¾ partial veneer crown provides better retention for an anterior bridge compared to other listed options, ensuring stability and longevity. This design is beneficial for anterior restorations. [Q0103]
• Ante’s Law emphasizes that the supporting structure (pericemental area) of abutment teeth should be sufficient to bear the load of the prosthesis, ensuring stability and longevity. This principle guides the selection of abutment teeth. [Q0159]
• A long path of insertion provides better retention for full veneer crowns by increasing the surface area for adhesion. This design feature is crucial for the stability of the restoration. [Q0212]
• Retention loss in Maryland bridges is often due to failure at the resin-metal interface, which can compromise the stability of the restoration. Proper technique and materials are essential to prevent this issue. [Q0316]
• A distally placed non-rigid connector can become unseated due to mesial drift of the abutment tooth, leading to loss of stability. Understanding tooth movement is critical in designing such restorations. [Q0839]
• An optimum crown-to-root ratio for an abutment tooth is 2:1, ensuring sufficient support for dental restorations. This ratio helps in distributing occlusal forces effectively. [Q0874]
• Failure typically occurs between the core and cement in restorations with a crown cemented to a pin retained amalgam core. Ensuring proper bonding and material compatibility is crucial. [Q0891]
• The ability of a tooth to withstand occlusal loading depends on its condition and structural integrity. Assessing these factors is essential for successful prosthodontic treatment. [Q3079]
• The length of the post is the most important factor in retaining a post, as it provides adequate support and stability. Ensuring proper post length is critical for the longevity of the restoration. [Q4382]
• Resin cement is the most retentive type of cement, providing strong adhesion and stability for dental restorations. This type of cement is preferred for its superior bonding properties. [Q4386]
• Custom cast posts are most retentive due to their precise fit and customization, offering better stability and support for restorations. This approach ensures a tailored fit for each patient. [Q4387]
• Root fracture is the most common cause of post failure due to the stress concentration at the post-root interface. Proper post placement and design are essential to prevent such failures. [Q5573]
• The ideal length of a dental post is typically two-thirds the root length for optimal retention. This length provides sufficient support without compromising the remaining tooth structure. [Q5626]
• 1 mm is generally the ideal thickness for a dental post to provide adequate strength while preserving tooth structure. This thickness balances durability and tooth preservation. [Q5627]
• The expected lifespan of resin-bonded bridges is typically 5 to 10 years, depending on factors such as oral hygiene and occlusal forces. Regular maintenance is essential for longevity. [Q5633]
• Threaded pins offer the most retention in dental restorations, providing a secure hold in the tooth structure. This design is beneficial for ensuring the stability of the restoration. [Q5679]
• Threaded posts offer the most retention among dental posts, ensuring a secure and stable foundation for restorations. Their design allows for better adaptation and retention. [Q5680]
• Dental posts provide retention and stability for dental crowns, essential for the longevity and function of the restoration. Proper selection and placement are crucial for successful outcomes. [Q5971]
• Wrought posts are generally stronger than cast posts due to their grain structure but only in specific applications. Understanding material properties helps in choosing the right post for each case. [Q6110]

Terminology

• The saddle does not come in contact with the pontic; it refers to the edentulous ridge area. Proper terminology is crucial for accurate communication and understanding in dental practice. [Q0278]
• Abrasion is not caused by tooth-to-tooth contact; it is typically caused by external objects. This distinction helps in diagnosing and treating wear issues accurately. [Q3145]
• Abrasion is typically caused by external objects, not tooth-to-tooth wear. Identifying the cause of abrasion is essential for effective management. [Q3146]
• Abrasion is the wear of a tooth by physical means other than tooth contact, such as brushing. This understanding aids in preventative measures and treatment planning. [Q3147]
• A butt joint in dentistry is used to join two surfaces at a right angle, providing a strong and stable connection. This technique is commonly used in various restorative procedures. [Q3399]