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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: Oral Dis. 2012 Jan 11;18(5):459–468. doi: 10.1111/j.1601-0825.2011.01893.x

Table 2.

Inflammation scoring system used to characterize periodontal lesions in maxillae and mandibles of rice rats.

Score degree Lesions
0 absence None
1 slight Gingivitis: slight hyperplasia of GE, intraepithelial inflammatory cell infiltration. Accumulation of bacterial plaque. No substantial changes in the LP, PDL or ABC.
2 mild Gingival hyperplasia, inflammatory cell infiltration of the GE and LP, accumulation of bacterial plaque. No substantial changes in the PDL or ABC.
3 moderate Erosion/ulceration and hyperplasia of the GE and accumulation of bacterial plaque. Moderate inflammatory cell infiltration of the LP, disruption of the PDL, migration of the junctional epithelium, and ABC resorption.
4 severe Ulceration and hyperplasia of the GE. Severe inflammatory cell infiltration of the LP, disruption of the PDL, migration of the junctional epithelium, and ABC resorption and osteolysis.

GE: gingival epithelium, LP: lamina propria, PDL: periodontal ligament and ABC: alveolar bone crest.