These versatile instruments are essential to create the axiopulpal bevel on class II amalgams and to remove lips of undermined tooth structure
at the gingival cave surface margin. They are indispensable for creating bevels on inlays and onlays if held at the correct angle.
GMT’s are used as a field plow, with the bevel resting on the tooth structure and the instrument pushed, rather than pulled to create the desired
result – few dentists understand this principle.
The gingival margin trimmers (GMTs) are modified hatchets that have working ends with opposite curvatures and bevels.
As the name implies, GMTs are used to trim, smooth, and shape the gingival floor of a cavity preparation.
gingival margin trimmers, are restorative cutting instruments used to cut enamel and produce a bevel on enamel margins.