These moulds have been designed for easier and faster setting up and have bases of the teeth cut away to reduce grinding time in the laboratory. The cusp angles of the uppers is 23° to aid mastication, whereas those of the lowers are flatter to avoid interferences in the mouth and reduce time taken in both the clinic and the laboratory. Aesthetic appearances have been enhanced with the buccal faces of the premolars lengthened to provide an even graduation between canines and premolars, avoiding the step down found in other ranges.
Several of the lower moulds are narrower bucco-lingually to provide increased tongue space. All moulds in the range interdigitate easily both in balanced and lingualised occlusion. 4natur posterior moulds cover the full spectrum of clinical requirements, from the petite mould P1 to the extra large mould P6.