International Poster Journal of Dentistry and Oral Medicine



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Int Poster J Dent Oral Med 8 (2006), No. 1     15. Mar. 2006
Int Poster J Dent Oral Med 8 (2006), No. 1  (15.03.2006)

Poster 298, Language: English

Alveolar bone resorption in a model of periodontitis in rats
Dumitrescu, Alexandrina L./Donaldson, Lucy F.
Aim of the study: to characterise a rat model of periodontitis for use in functional studies by analysis of alveolar bone loss in rats with experimentally-induced periodontitis.
Methods: Periodontal inflammation was induced by a single injection of 10 mg liposaccharide (LPS) (Salmonella typhimurium) in 1ml saline into rat mandibular gingiva at the buccomesial aspect of the second molar. Animals were killed after 7 days, mandibles dissected and sectioned for histological and immunocytochemical analysis.
Results: There was an 80% increase in the alveolar bone loss, measured as the distance between alveolar crest and the cemento-enamel junction, in LPS-injected animals compared to controls (468±230µm control, 830±270µm LPS, pConclusion: Intragingival injection of LPS in the rat provides an easily induced reproducible experimental model of periodontal inflammation that reiterates features of human disease.

Keywords: bone resorption, inflammation, lipopolysaccharide, osteoclast activation, periodontitis

July 3rd-4th 2002
BIRAs Summer Meeting
The University of Bath, UK