Operative Dentistry Quiz

Which of the following is the matrix of choice for an MOD amalgam restoration?

• Sectional matrix with bitine ring

• Mylar strip without retainer and with double wedging

• Tofflemire retainer with metal band

• Tofflemire with celluloid (Mylar) strip

Which statement is/are true regarding a carious legion progression?

• It progresses from non-cavitated to cavitated within 3 weeks

• White spots can be developed within 3 weeks under heavy sucrose diet and poor oral hygiene

• It progresses faster in medically compromised patients

• Pit and fissure legions develop faster

Which of the following can be used for finishing and polishing composite resin restorations?

• Discs

• Aluminum oxide abrasive strips

• Cross-cut tungsten carbide burs

• Low-speed rubber instruments

• Coarse diamonds

Which is/are true about the relationship between diet and carries

• Diet is not a significant factor in carries occurrence

• Diet can make the biofilm more cariogenic

• Diet can make the biofilm more sticky and viscous

• Quantity of consumed fermentable carbohydrates is more important than frequency

A bitine ring:

• Provides additional tooth separation

• Stabilizes sectional matrix

• May cause deformation of the matrix band in wide proximal preparations

• Is ideal for amalgam restorations

What are some of the aims of modern operative dentistry?

• To restore function

• To restore any type of lesion as soon as possible

• To extend cavity preparations for prevention

• To arrest the lesion activity by sealing the coronal part with an adhesive material

• To restore esthetics

6. Converging walls of a tooth preparation is part of the:

• 6. Secondary resistance form
     

• 6. Primary retention form
     

• 6. Secondary retention form

• 0. Primary resistance form

What is/ are disadvantage(s) of amalgam?

• Contains mercury

• Not resistant to wear

• Does not have specific preparation design requirements

• Poor aesthetics

A composite filling material can be used for:

• Filling of cavities

• Veneers and diastema of all classes

• Foundations and build-ups

• Sealants and preventative fillings

Which is/are true regarding sclerotic dentin?

• It has less mineral content than normal dentin

• It is darker in color

• None of the above

• It is soft to the explorer tip