Oversized half-sectioned model, featuring pulp necrosis, pulp gangrene, infected root canal, root canal treatment done after pulpectomy, pulpitis caused by fracture and bone atrophy and gingival retraction by periodontal disease.

On buccal side, featuring moderate to severe stage of periodontal disease, root furcation of 2nd molar is exposed with deposition of dental calculus by bone atrophy and gingival retraction.