Dental Composites Types

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What is the main advantage of allowing layer polymerization in composites?

Reduced difficulty in achieving color

Less shrinkage (correct)

Greater fluidity

Increased mechanical resistance

Which type of composite resin is used for cementation and as a filling material?

Self-cured

Chemical-cured

Light-cured

Dual polymerization (correct)

What is the main drawback of self-cured composites?

Long working time

Difficulty in achieving color

Short working time (correct)

High shrinkage

What is the main characteristic of flowable composites?

Greater fluidity Signup and view all the answers

Which type of composite resin is indicated for posterior teeth?

High viscosity Signup and view all the answers

What is the main disadvantage of macro filled composite resins?

Difficulty in polishing Signup and view all the answers

What is the main advantage of light-cured composites?

Long working time Signup and view all the answers

What is the main use of flowable composites in restorative treatments?

For sealing pits and fissures Signup and view all the answers

What is the direction of shrinkage in photopolymerizable composites?

Towards the light and then towards the depth Signup and view all the answers

What is the effect of increasing the percentage of inorganic particles on the aqueous absorption of composites?

It decreases the aqueous absorption Signup and view all the answers

What is the result of the hygroscopic expansion of composites?

It compensates for the shrinkage of the material Signup and view all the answers

What is the main cause of material fatigue in dental composites?

Repeated small forces Signup and view all the answers

What is the purpose of adding radiopaque substances to dental composites?

To set the internal and external limits of the restorations Signup and view all the answers

What is the effect of shrinkage on the marginal and occlusal margins of dental restorations?

It increases the risk of fractures Signup and view all the answers

What is the percentage of mass volume affected by polymerization shrinkage in composite resins?

2.7-7.1% Signup and view all the answers

What is the consequence of polymerization shrinkage in terms of dentinal hypersensitivity?

Increased dentinal hypersensitivity due to fluid movements within the dentinal tubules Signup and view all the answers

What happens to the internal stress caused by polymerization shrinkage over time?

It can be reabsorbed if the remaining walls are strong enough Signup and view all the answers

What is the most serious problem associated with composite resins?

Polymerization shrinkage Signup and view all the answers

What is the effect of polymerization shrinkage on the cuspidal deflection?

It reduces the intercuspal distance by up to 2% Signup and view all the answers

What is the consequence of polymerization shrinkage on the enamel?

It causes cracks or fractures mainly at cervical enamel and gingival floors Signup and view all the answers

What is the relationship between polymerization shrinkage and microfiltration?

Microfiltration is especially prominent when there is poor or absent enamel Signup and view all the answers

What is the effect of polymerization shrinkage on gap formation?

It causes gap formation by detachment of the dentin seal Signup and view all the answers