22 Questions
What is the main advantage of allowing layer polymerization in composites?
Less shrinkage
Which type of composite resin is used for cementation and as a filling material?
Dual polymerization
What is the main drawback of self-cured composites?
Short working time
What is the main characteristic of flowable composites?
Greater fluidity
Which type of composite resin is indicated for posterior teeth?
High viscosity
What is the main disadvantage of macro filled composite resins?
Difficulty in polishing
What is the main advantage of light-cured composites?
Long working time
What is the main use of flowable composites in restorative treatments?
For sealing pits and fissures
What is the direction of shrinkage in photopolymerizable composites?
Towards the light and then towards the depth
What is the effect of increasing the percentage of inorganic particles on the aqueous absorption of composites?
It decreases the aqueous absorption
What is the result of the hygroscopic expansion of composites?
It compensates for the shrinkage of the material
What is the main cause of material fatigue in dental composites?
Repeated small forces
What is the purpose of adding radiopaque substances to dental composites?
To set the internal and external limits of the restorations
What is the effect of shrinkage on the marginal and occlusal margins of dental restorations?
It increases the risk of fractures
What is the percentage of mass volume affected by polymerization shrinkage in composite resins?
2.7-7.1%
What is the consequence of polymerization shrinkage in terms of dentinal hypersensitivity?
Increased dentinal hypersensitivity due to fluid movements within the dentinal tubules
What happens to the internal stress caused by polymerization shrinkage over time?
It can be reabsorbed if the remaining walls are strong enough
What is the most serious problem associated with composite resins?
Polymerization shrinkage
What is the effect of polymerization shrinkage on the cuspidal deflection?
It reduces the intercuspal distance by up to 2%
What is the consequence of polymerization shrinkage on the enamel?
It causes cracks or fractures mainly at cervical enamel and gingival floors
What is the relationship between polymerization shrinkage and microfiltration?
Microfiltration is especially prominent when there is poor or absent enamel
What is the effect of polymerization shrinkage on gap formation?
It causes gap formation by detachment of the dentin seal
This quiz covers the different types of dental composites, including self-cured, light-cured, and dual polymerization composites, their characteristics, and uses in dental restorations.
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