Which of the following is not a principle in obtaining resistance form 1) The cavity should not extend 1/3rd to 1/4th intercuspal distance 2) The floors or planes should be at right angles to the direction of loading (masticatory forces) 3) There should be high degree of parallelism between the cavity walls 4) None of the above
Conservative DentistryAnswer: 3
A reverse bevel is given in inlay 1) For converging form 2) For resistance form 3) For lap sliding fit 4) To remove the undermining enamel
Conservative DentistryAnswer: 3
All of the following are true of compsites except 1) Placed and finished at the same appointment 2) More colour stable than unfilled resins 3) Both of the above 4) None of the above
Conservative DentistryAnswer: 2
Infected dentine shows 1) Both organic and inorganic components in reversible form 2) Both organic and inorganic components in irreversible form 3) Both A and B 4) None of the above
Conservative DentistryAnswer: 2
The number of point angles in a permanent mandibular first molar is 1) 6 2) 8 3) 4 4) 10
Conservative DentistryAnswer: 3
Undertrituration of the amalgam results in 1) Increased expansion and reduced strength 2) Increased contraction and increased strength 3) Increased expansion but also increased strength 4) All of the above
Conservative DentistryAnswer: 1
Friction locked pins are usually retained by 1) Threads on pin 2) Resiliency of dentin 3) Luting cement 4) Channel depth
Conservative DentistryAnswer: 2
What appears to be the principal problem with the use of gallium alloys as an amalgam substitute 1) Less compressive strength 2) More expansion which leads to tooth surface 3) Poor biocompatibility 4) Loss of corrosive products
