Which of the following instruments can be used for placing gingival bevels on inlay preparations? 1. Margin trimmers. 2. Enamel hatchets. 3. Carbide finishing burs. 4. Small diamond disks.
(2) and (4)
(1) (2) (3)
(1) and (3)
All of the above.
(4) only
1 explanations
oneguy
The gingival margin trimmer is designed to produce a proper bevel on gingival enamel margins of proximoocclusal preparations. It is similar in design to the enamel hatchet, except the blade is curved (similar to a spoon excavator), and the primary cutting edge is at an angle (other than perpendicular) to the axis of the blade. It is made as right and left types. Gingival bevels can also be placed by using a carbide finishing bur.
oneguy