Suggestion Guide from Dental USA
Best universal instrument for scaling & root planning
Langer 3/4 = universal curette designed for maxillary arch
Langer 1/2 = universal curette designed for the mandibular arch
But both of the Langers can be used throughout the mouth where ever
They adapt.
Anterior (centrals, laterals & canines)
Sub-0 ,Gracey 1/2, 5/6, BH 1/2, YG 7/8, H6/H7, N5, N137
Posterior (molars & bicuspids)
YG 7/8, McCall 17/18, Nevi 2, 204S
Gracey 5/6, 7/8, 11/12 & 13/14, 17/18
Furcations
Mini Graceys (60% of the time, furcation openings are too narrow to
adapt a new curette, so mini's are a good choice.)
Barnhart 1/2
Colombia 4R/4L