The Orthodontic Model Series offered by Models Plus is comprised of 9 sets of Orthodontic and Dental Malocclusions. The series consists of one set Class I Ideal, Class I Anterior Open Bite, Class II Division I Blocked Cuspids, Class II Division Il Mixed Dentition, Class II Division I Open Bite Narrow Arches, Class II Division I Excessive Overbite Excessive Overjet, Class II Division II Permanent Dentition, Class III Mixed Dentition, Class II Mixed Dentition Posterior Crossbite.