PROSTHODONTICS - American College of Prosthodontists

June 2004, Volume 13, Number 2 79Figure 3. Class III patient: The patient in this figure is classified as Class III since large defective amalgamand composite restorations occur in 4 sextants. The remaining tooth structure is substantially compromised inmost posterior teeth. The occlusion is substantially compromised requiring reestablishment of the occlusal schemewithout a change in the occlusal vertical dimension. (A) Frontal view, maximum intercuspation. (B) Right lateralview, maximum intercuspation. (C) Left lateral view, maximum intercuspation. (D) Occlusal view, maxillary arch.(E) Occlusal view, mandibular arch. (F) Panoramic radiograph.Class IV (Fig 4)The Class IV classification level is characterized byseverely compromised tooth conditions requiringextensive therapy and/or reestablishment of occlusalscheme with change in the occlusal verticaldimension.1. Severely compromised tooth condition Tooth condition—insufficient tooth structureto retain or support intracoronal orextracoronal restorations—in 3 or moresextants.2010 CDEL Re-recognition of the Specialty Report 180 of 279