Podcast
Questions and Answers
What is a significant problem for the long-term success of contemporary composite resins?
What is a significant problem for the long-term success of contemporary composite resins?
- Shrinkage during polymerization (correct)
- Biochemically altered dentin
- Thin gingival tissue
- Food and drink pigment penetration
What is the role of hemoglobin in dentin?
What is the role of hemoglobin in dentin?
- Reduces shrinkage stresses during polymerization
- Modifies tooth color and appearance
- Triggers food and drink pigment penetration
- May play an important role in color change (correct)
What is the C-factor in dentistry?
What is the C-factor in dentistry?
- A type of composite resin restoration
- A measure of tooth color and appearance
- A clinically relevant predictor of the risk of debonding and leakage (correct)
- A factor in food and drink pigment penetration
What is the indication for a direct composite restoration?
What is the indication for a direct composite restoration?
What is the effect of pulpal pressure on tooth color and appearance?
What is the effect of pulpal pressure on tooth color and appearance?
What is the effect of biochemically altered dentin on tooth color and appearance?
What is the effect of biochemically altered dentin on tooth color and appearance?
Why is thin gingival tissue considered a negative factor for esthetic outcome?
Why is thin gingival tissue considered a negative factor for esthetic outcome?
What is the purpose of using an incremental filling technique?
What is the purpose of using an incremental filling technique?
What is the primary advantage of using resin-modified glass ionomer materials as a core material?
What is the primary advantage of using resin-modified glass ionomer materials as a core material?
What is the primary reason for the failure of composite cores?
What is the primary reason for the failure of composite cores?
What is the typical failure rate of fiber posts and cores after a service period of 7 to 11 years?
What is the typical failure rate of fiber posts and cores after a service period of 7 to 11 years?
What is the advantage of using light-curing composite core materials?
What is the advantage of using light-curing composite core materials?
What is the primary advantage of using resin composites for core fabrication?
What is the primary advantage of using resin composites for core fabrication?
What is the primary advantage of cast metal post and core?
What is the primary advantage of cast metal post and core?
What is the primary reason for bonding light-cured resin composites to the pulp chamber and canal orifices?
What is the primary reason for bonding light-cured resin composites to the pulp chamber and canal orifices?
What is the primary advantage of using metal posts compared to amalgam or gold cores?
What is the primary advantage of using metal posts compared to amalgam or gold cores?
What happens when a fiber post/composite foundation fails?
What happens when a fiber post/composite foundation fails?
What is the primary location of functional stresses in a fiber post/composite foundation?
What is the primary location of functional stresses in a fiber post/composite foundation?
Why is a ferrule necessary in a fiber post/composite foundation?
Why is a ferrule necessary in a fiber post/composite foundation?
What determines the pattern of stress transmission from the post to the root dentin?
What determines the pattern of stress transmission from the post to the root dentin?
What happens when the modulus of elasticity of the post is higher than that of the dentin?
What happens when the modulus of elasticity of the post is higher than that of the dentin?
What is the primary purpose of restorations of endodontically treated teeth?
What is the primary purpose of restorations of endodontically treated teeth?
What is the outcome of a root fracture originating at the apex of a rigid post?
What is the outcome of a root fracture originating at the apex of a rigid post?
What is a common requirement for a post, regardless of its material or design?
What is a common requirement for a post, regardless of its material or design?
What is the effect of MOD cavities on the fracture resistance of endodontically treated teeth?
What is the effect of MOD cavities on the fracture resistance of endodontically treated teeth?
What is the reason for the large number of post designs and materials available on the market?
What is the reason for the large number of post designs and materials available on the market?
Why may a direct composite restoration not be appropriate for endodontically treated teeth with MOD cavities?
Why may a direct composite restoration not be appropriate for endodontically treated teeth with MOD cavities?
What is the benefit of using resin composite materials for restorations of endodontically treated teeth?
What is the benefit of using resin composite materials for restorations of endodontically treated teeth?
What is the benefit of using in vitro fiber-reinforced composite restorations for endodontically treated teeth?
What is the benefit of using in vitro fiber-reinforced composite restorations for endodontically treated teeth?
What is the effect of inserting an in vitro fiber post in the root canal of an endodontically treated tooth?
What is the effect of inserting an in vitro fiber post in the root canal of an endodontically treated tooth?
When is a full crown restoration of choice for an endodontically treated tooth?
When is a full crown restoration of choice for an endodontically treated tooth?
What is the main reason why resin composite materials may require the use of reinforcing fibers?
What is the main reason why resin composite materials may require the use of reinforcing fibers?
What is the primary purpose of a post in a nonvital anterior tooth?
What is the primary purpose of a post in a nonvital anterior tooth?
What type of posts are used in nonvital anterior teeth restorations?
What type of posts are used in nonvital anterior teeth restorations?
What is the primary advantage of ceramic coronal restorations?
What is the primary advantage of ceramic coronal restorations?
What is the preferred method of cementation in nonvital anterior teeth restorations?
What is the preferred method of cementation in nonvital anterior teeth restorations?
What is the primary purpose of a core in a nonvital anterior tooth?
What is the primary purpose of a core in a nonvital anterior tooth?
What is the primary advantage of CAD-CAM restorations?
What is the primary advantage of CAD-CAM restorations?
What is the primary purpose of etching in ceramic restorations?
What is the primary purpose of etching in ceramic restorations?
What is the primary material used in structurally compromised anterior teeth restorations?
What is the primary material used in structurally compromised anterior teeth restorations?
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Study Notes
Opaque Substances and Tooth Color
- Opaque substances affect the color and translucency of uncrowned teeth
- Biochemically altered dentin modifies tooth color and appearance
- Organic substances in dentin (e.g., hemoglobin) may contribute to color change
- Food and drink pigment penetration, triggered by the absence of pulpal pressure, also affect tooth color
Incremental Filling Technique
- Reduces shrinkage stresses during polymerization
- Recommended for long-term success of composite resin restorations
- C-factor (ratio of bonded to unbonded surfaces) is a predictor of debonding and leakage risk
- High C-factors (>3.0) increase the risk of debonding
Restoration of Endodontically Treated Teeth
- Restorations are designed to protect the remaining tooth from fracture, prevent reinfection, and replace missing tooth structure
- Thin gingival tissue or thin biotype is a negative factor for esthetic outcome
- Direct composite restorations may be indicated for single proximal surface loss
- Incremental filling technique is mandatory for these restorations
Fiber-Reinforced Composite Restorations
- May represent a valuable alternative to conventional restorations
- In vitro fiber-reinforced composite restorations may increase mechanical resistance
- Inserting an in vitro fiber post in the root canal before bonding a direct MOD restoration reduces its fracture resistance
Full Crowns
- May be the restoration of choice for significant coronal tooth structure loss
- Protects the coronocervical structures but may result in severe, untreatable root fractures if failed
- The presence of a ferrule is mandatory
Posts and Core Materials
- Posts can be fabricated from metal, ceramic, or fiber-reinforced resins
- Retention and resistance are key properties for posts
- Resin-modified glass ionomers have moderate strength and are suitable for moderate-sized buildups
- Composite core materials are typically two-paste, self-cured composites, but light-curing materials are also available
- Light-curing composite core materials eliminate the risk of chemical incompatibility between adhesives and self-curing resin core materials
Indirect Foundation Restorations
- Cast post and core has been a popular choice for many years
- Adhesive cementation is preferred to conventional cementation for indirect foundation restorations
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