Gracey 1-2 and 3-4 Anterior teeth:

The Gracey Curette 1/2 & 3/4 are designed for use on all aspects of anterior teeth (including canines). The instrument has a small contra-angle and a return angle resulting in an instrument which is close to the midline of the instrument handle for better stability. The shank is particularly long on Gracey 1/2s to permit access to lower anteriors with the patient in a supine position

Gracey 5-6 Anterior and premolar teeth:

Gracey 5/6 are best used interproximally on most teeth up to and including the second molars, and distally and lingually up to the second bicuspid. However, the instrument’s angulation means access to difficult areas and posteriors is limited

Gracey 7-8 Buccal and lingual surfaces:

A Gracey 7/8 is arguably the most versatile in the range and can be used on the buccal and lingual surfaces of bicuspids and molars. The instrument has a large contra-angle with only a medium return angle and a shorter shank than the previously described curettes. The tip terminates in a hooked toe standing off-line to the instrument to allow for any tendency to twist during use to be countered by the angle of insertion

Gracey 9-10 Posterior teeth – for buccal and lingual surfaces of molars using horizontal technique:

 The Gracey 9/10 is predominantly used on the buccal and lingual molar aspects, especially around the bifurcation, where access can be difficult. Its wide contra-angle, wide return angle, and short shank make it a distinctive instrument. The toe is very nearly in line with the instrument handle, making this pattern especially suited to the least accessible root surfaces, while still allowing good control

Gracey 11-12 Posterior teeth – mesial surfaces
Gracey 13-14 Posterior teeth – distal surfaces:

The 11/12 and the 13/14 Gracey curettes act as a pair, permitting access to the mesial and distal root surfaces respectively. These Graceys are suited for use on both bicuspids and molars. The small contra-angle and return angle are complemented by a third angle to offset the blade, which forms a smooth bladed toe. This third angle is exaggerated on the 13/14 to curl the toe round further. These curettes’ tips are notably long, permitting access to the posterior teeth while keeping the clinician’s hand comfortably out of the mouth