Assessment of Alloxan-Induced Diabetic Rats as a Periodontal Disease Model Using a Selective Cyclooxygenase (COX)-2...

Area of Science:

• Oral pathology
• Endocrinology
• Periodontology

Background:

• Long-term hyperglycemia in alloxan-treated rats has been suggested to induce periodontal disease (PD).
• Previous studies in this model identified dental caries, suggesting concurrent occurrence of both pathologies.

Purpose of the Study:

• To evaluate alloxan-induced diabetic rats as a model for periodontal disease (PD).
• To assess the efficacy of a selective COX-2 inhibitor in managing PD in this model.

Main Methods:

• Six-week-old female F344 rats were divided into control, alloxan-induced diabetic (AL), and alloxan-induced diabetic with etodolac (AL+Et) groups.
• Animals were euthanized at 26 weeks for histopathological examination of oral tissues.
• A selective COX-2 inhibitor (etodolac) was administered to assess its effect on periodontal inflammation.

Main Results:

• The AL group exhibited enhanced gingivitis, marginal periodontitis, and alveolar bone resorption alongside dental caries compared to controls.
• The COX-2 inhibitor (etodolac) did not reduce periodontal inflammation in the AL+Et group.
• Periodontitis was minimal around healthy molars, and gingivitis was only slightly worse than controls in the AL group; inflammation correlated with caries severity.

Conclusions:

• Alloxan-induced diabetic rats serve as a model for dental caries, not periodontal disease (PD).
• Hyperglycemia in this model may facilitate caries progression to apical periodontitis.
• Associated inflammation might extend to surrounding periodontal tissues, mimicking PD features.