Cavity preparation can be limited to proximal surface in class II cavities when 1. Caries is present below the contact point 2. Caries does not undermine enamel 3. Facial and lingual cavosurface margins can be placed in self-claening areas 4. All of the above
Conservative DentistryAnswer: 4
Direction of placement of retentive pins holes should be 1) Perpendicular to external tooth surface 2) Parallel to external tooth surface 3) Parallel to other pins 4) Never beneath cusps to be restored
Conservative DentistryAnswer: 2
The matrix retainer wherein anatomy adaptation is possible without wedges is 1) Tofflemire 2) Steele"s siqveland 3) Ivory no. 1 4) Ivory no. 8
Conservative DentistryAnswer: 2
While preparing occlusal cavity for amalgam in mandibular first premolar, the bur 1. Is kept absolutely vertical 2. Is tilted slightly buccally 3. Is tilted slightly lingually 4. Can be kept in any direction
Conservative DentistryAnswer: 3
A material like amalgam with high compressive strength but low tensile strength is said to be (or) the property of the amalgam which makes it undesirable to place a bevel on cavity preparation 1) Toughness 2) Brittleness 3) Ductility 4) Malleability
Conservative DentistryAnswer: 2
Rubber dam clamp must contact the anchor tooth gingival to the height of contour to maintain stability. The other criteria that clamp should posses is 1) All four points must contact the tooth 2) All four points must be sharp 3) The bow must be directed to the distal side of the tooth 4) None of the above
Conservative DentistryAnswer: 1
The portion of the tooth where the enamel rods are perpendicular to the tangent of the surface 1. Middle thirds of all axial surfaces 2. Incisal or occlusal thirds 3. Gingival thirds 4. All of the above
Conservative DentistryAnswer: 1
In a class 1 cavity prepared for silver amalgam is extended to half the distance between the contact area and the fissures and the cusp tip, the direction of the buccal and lingual walls is 1) Diverging 2) Converging 3) Parallel 4) Independent
