Dental Curette, Universal, Columbia, 4L-4R. Curettes are used supragingivally and subgingivally on enamel and root surfaces. There are two major sub-types of curettes: universal curettes and area-specific curettes. Universal curettes can be used to remove medium sized and small calculus deposits. This curette is used for removal of minor calculus of incisors and premolars. For supra and sub gingival.