Effect of crude extract and essential oil of Cordia verbenacea in experimental periodontitis in rats

Aim: To evaluate the effect of crude extract and essential oil of Cordia verbenacea (C.V.),systemically administered, on ligature-induced periodontitis in rats. Methods: Periodontitis wasinduced in 54 Wistar rats: one of the first mandibular molars was randomly assigned to receive aligature, whereas the contralateral molar was left unligated. Then, animals were randomly assignedto one of the following groups: non-treatment group (n=18): animals that received 10 mL/day ofvehicle; C.V. extract group (n=18): animals that received 100 mg/kg/day of crude extract of C.verbenacea; and C.V. essential oil group (n=18): animals that received 100 mg/kg/day of essentialoils free of C. verbenacea. All therapies were administered orally 3 times daily, for 11 days. Next,the animals were sacrificed, and the specimens were processed for morphometric analysis. Boneloss was determined on the buccal surface of the lower first molars by the distance of thecementoenamel junction from the alveolar bone. Results: Both extract and essential oil of C.verbenacea orally administered decreased alveolar bone loss in the ligated teeth when comparedwith the non-treated group (p<0.05). Conclusions: The present study demonstrated that systemicadministration of both formulations of Cordia verbenacea may attenuate the progression of ligatureinducedperiodontitis.

Evaluation of the effect of an organic extract obtained from Ipomoea alba L. on experimental periodontitis in rats

The aim of this study was to evaluate the effect of an organic extract obtained from Ipomoea alba L. (Convolvulaceae or OE 1493), on experimental periodontal disease in rats. Periodontitis was induced in thirty six Wistar rats: a first mandibular molar was randomly assigned to receive a ligature, whereas the contralateral molar was left unligated. Animals were randomly assigned to two groups and treated topically, three times a day, for 11 days, as follows: Control Group - vehicle-treated (n = 18), and Test Group - OE 1493-treated (n = 18). The rats were sacrificed on the 12th day. Morphometrical measurements from the cementoenamel junction to the bone crest were performed to determine alveolar bone loss, using standardized photographs. Single- and multi-dose acute toxicity assays were carried out after OE 1493 treatment. Morphometrical analysis demonstrated that topically-administered OE 1493 showed no effect on reducing bone loss when compared with the control group (p > 0.05). In addition, OE 1493 did not present toxicity. Within the limits of this investigation, it may be concluded that OE 1493 did not show any positive influence on the progression of ligature-induced periodontitis in rats, when administered according to the regimen used in the present study.