Comparison of the antigingivitis and antiplaque efficacy of the herboral [herbal extract] mouthwash with chlorhexidine and listerine mouthwashes: a clinical study

The study was done to compare the anti gingivitis and antiplaque efficacy of Herboral with CHX and Listerine and to assess the side effects of the mouthwashes, if any. It was a single-centre, double-blind, parallel group and oral hygiene controlled clinical trial. 60 participants were equally divided into 3 groups: Herboral, CHX, and Listerine. These groups were asked to rinse with their respective mouthwash 2 times daily for 15 days. Gingivitis was evaluated by using Loe and Silness index [1963], and plaque was evaluated by using the Turesky modification of the Quiely Hein index [1970]. The evaluation was carried out at the end of 15 days, 1 month, and 3 months. Intragroup comparison for plaque and gingival scores was done using [t] test. Intergroup comparison was done using ANOVA and Tukey test. At the end of 15 days, all three mouth rinses were effective in reducing the mean scores [gingivitis/ plaque]: Herboral [0.34/1.0], Chlorhexidine [0.22/1.18] and Listerine [0.86/1.67]. At the end of 30 and 90 days the plaque and gingival scores had increased in all the three groups, more in the Listerine group. The use of CHX showed brown staining, whereas Listerine gave a burning sensation. As an antiplaque and antigingivitis agent, the Herboral mouthwash is as effective as Chlorhexidine [CHX] and more effective than Listerine

Effect of axial groove and resin luting cements on the retention of complete cast metal crowns

Background: the design of the tooth preparation and the cementing medium are important considerations in the retention of crowns and fixed partial dentures. The purpose of this invitro study was to determine the effect of axial groove on the retention of complete cast metal crowns using two resin luting cements

Methods: forty freshly extracted intact human molar teeth were prepared in their long axis to receive complete cast metal crowns. The specimens were randomly divided into two groups [one control and one study group]. An axial groove of uniform size and shape was made on the prepared teeth under the study group. Axial surface area of prepared teeth specimens was measured. Complete cast metal crowns were fabricated for each specimen. Specimens of each group were divided into subgroups of 10 samples and were cemented with two resin luting cements, RelyX Unicem® and Calibra®, respectively. The cemented crowns were loaded in tension using a Universal Instron testing machine. The maximal tensile strength was recorded. Data were compared using the Mann-Whitney U test [alpha=0.05]

Results: no significant differences in the tensile stress values were noted between the control [mean: 5.76 +/- 0.392 MPa] and study [mean: 5.93 +/- 0.751 MPa] groups cemented with RelyX Unicem. No significant differences in the tensile stress values were noted between the control [mean: 4.92 +/- 0.641 MPa] and study [mean: 5.15 +/- 0.478 MPa] groups cemented with Calibra. However, significant difference in the tensile stress values was found between the two resin cements in the control and study groups

Conclusion: axial groove placed in tooth preparations for resin bonded complete cast metal crowns had no statistically significant effect on retention. The use of [RelyX Unicem®] yielded greater retention values when compared to Calibra®