A method for changing the occlusal scheme for a set of teeth from lingualised to balanced occlusion which comprises the steps of: (a) providing a set of artificial teeth comprising: a maxillary unit and a mandibular unit; wherein the maxillary unit comprises a wax or resin base supporting maxillary posterior teeth, wherein the wax or resin base can be softened; wherein the mandibular unit comprises a wax or resin base supporting mandibular posterior teeth; wherein the maxillary posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the mandibular posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the maxillary posterior teeth and the mandibular posterior teeth are in a lingualised occlusion and at least one of following occurs: the palatal cusp of the upper 4 fits into the distal fossa of the lower 4, the palatal cusp of the upper 5 fits into the distal fossa of the lower 5, the mesial palatal cusp of the upper 6 fits into the central fossa of the lower 6, the distal palatal cusp of the upper 6 fits onto the marginal ridge of the lower 6 and the mesial palatal cusp of the upper 7 fits into the central fossa of the lower 7, and wherein the buccal cusps of the lower teeth are out of contact with the upper teeth; (b) softening the wax or resin under the maxillary posterior teeth; and (c) rotating the maxillary buccal cusps downwards around the said palatal cusps on the maxillary posterior teeth such that the palatal cusps remain within the centric stops of the mandibular posterior teeth. (a) providing a set of artificial teeth comprising: a maxillary unit and a mandibular unit; wherein the maxillary unit comprises a wax or resin base supporting maxillary posterior teeth, wherein the wax or resin base can be softened; wherein the mandibular unit comprises a wax or resin base supporting mandibular posterior teeth; wherein the maxillary posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the mandibular posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the maxillary posterior teeth and the mandibular posterior teeth are in a lingualised occlusion and at least one of following occurs: the palatal cusp of the upper 4 fits into the distal fossa of the lower 4, the palatal cusp of the upper 5 fits into the distal fossa of the lower 5, the mesial palatal cusp of the upper 6 fits into the central fossa of the lower 6, the distal palatal cusp of the upper 6 fits onto the marginal ridge of the lower 6 and the mesial palatal cusp of the upper 7 fits into the central fossa of the lower 7, and wherein the buccal cusps of the lower teeth are out of contact with the upper teeth; a maxillary unit and a mandibular unit; wherein the maxillary unit comprises a wax or resin base supporting maxillary posterior teeth, wherein the wax or resin base can be softened; wherein the mandibular unit comprises a wax or resin base supporting mandibular posterior teeth; wherein the maxillary posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the mandibular posterior teeth each comprise a buccal cusp selected from buccal cusps; wherein the maxillary posterior teeth and the mandibular posterior teeth are in a lingualised occlusion and at least one of following occurs: the palatal cusp of the upper 4 fits into the distal fossa of the lower 4, the palatal cusp of the upper 5 fits into the distal fossa of the lower 5, the mesial palatal cusp of the upper 6 fits into the central fossa of the lower 6, the distal palatal cusp of the upper 6 fits onto the marginal ridge of the lower 6 and the mesial palatal cusp of the upper 7 fits into the central fossa of the lower 7, and wherein the buccal cusps of the lower teeth are out of contact with the upper teeth; (b) softening the wax or resin under the maxillary posterior teeth; and (c) rotating the maxillary buccal cusps downwards around the said palatal cusps on the maxillary posterior teeth such that the palatal cusps remain within the centric stops of the mandibular posterior teeth.