TNFF7/8 - Direct Caliper
FF7 & FF8
Measuring thickness of enamel margin in direct restorations on anterior teeth, measuring thicknesses of direct and indirect restorations during various clinical phases, creating definition of dentinal curving.
This instrument is a restorative probe with a flat head (not rounded, as most periodontal probes) with grooves at 0.5mm increments. The tip is angled at 45° which when aligned against the preparation chamfer, allows for the thickness of dentinal material and residual buccal enamel to be determined.
The FF7 measures an enamel thickness of 0.5mm (the universal thickness in the third medium of the crown), while the FF8 measures a thickness of 0.9mm (which is preferred in incisal areas, or times when the thickness of the natural enamel is of critical importance). The shape of the dentin in the incisal direction in addition to the thickness to the margin can be determined with this instrument.

**Instruments are delicate and are meant to be used with a light touch. Hu-Friedy strongly recommends the use of IMS cassettes to protect the fine working ends of these instruments.