To evaluate the color stability of dual cure and light cure resin cements immersed in coffee solution at different time periods (baseline, 3 days and 1 week). Materials and methods: The color stability of three light curing (Variolink Esthetic (VLC); Rely X Veneer (RLC) and Mojo Veneer (MLC)) and three dual curing (Variolink Esthetic (VDC); Rely X Ultimate (RDC) and Breeze (MDC)) resin cements were tested. A total of sixty disks (10 mm diameter and 0.5 mm thickness) were prepared using a silicone mold (n=10). The specimens were subjected to baseline color measurement using Commission Internationale de l'Eclairege L*a*b* (CIELAB) color space system with the help of a spectrophotometer (LabScan XE, HunterLab, VA, USA). Following baseline color measurements, the specimens were immersed in a staining coffee solution. The color measurement was repeated after 3 days and 1 week of immersion in coffee solution. All the data collected were statistically analyzed using repeated measures of Analysis of variance (ANOVA, P<0.05). Result: After one week of storage in coffee solution, the mean color measurement scores in light cure group were found to be higher for RLC (1.22 ± 1.51) followed by VLC (0.85 ± 0.65) and NLC (0.68 ± 0.36) whereas in dual cure group, the mean color measurement scores were found to be higher for NDC (7.45 ± 4.50) followed by RDC (1.52 ± 1.24) and VDC (0.47 ± 0.34). Repeated measures ANOVA showed a statistically significant difference for light cure group (P=.004) at different time intervals but no significant difference with respect to dual cure group (P=.26). Conclusion: There was a significant difference observed between the light-and dual-cured cements over a different period of time. The color changes of both light-and dual-cure resin cements were within clinically acceptable limits except for the dual-cured Breeze cement.
The present clinical trial aimed to assess the effectiveness of antimicrobial
photodynamic therapy versus Aloe vera gel as an adjunct to scaling and
root planing on periodontal and microbial outcomes in patients with
periodontitis. Eligible patients undergoing nonsurgical periodontal treatment
were divided into 3 groups: group 1: antimicrobial photodynamic therapy; group
2: Aloe vera gel application; and group 3: scaling and root planing only.
Clinical periodontal variables included the assessment of plaque scores,
bleeding on probing, probing depth, and clinical attachment level gain. Plaque
samples were collected to estimate microbial counts of Tannerella
forsythia (T. forsythia) and Porphyromonas gingivalis
(P. gingivalis). All measurements were recorded at baseline, 3 mo,
and 6 mo. Statistical analysis of the given data was performed using the
chi-squared test and ANOVA for clinical periodontal and microbiological data.
Eighty-seven patients completed the trial. Bleeding on probing showed a
significant reduction in group 2 compared with the other groups (p <
0.001). Group 1 showed a statistically significant reduction in probing depth
and gain in clinical attachment level when compared to group 2 and group 3 (p
< 0.05). Group 1 showed a statistically significant reduction in the
counts of T. forsythia and P. gingivalis over a period of 3 mo (p
< 0.05). The reduction was seen for T. forsythia only following 6
mo (p < 0.05). Group 2 showed a significant reduction for only T.
forsythia at 3 mo (p < 0.05). Both antimicrobial photodynamic
therapy and Aloe vera gel helped in reducing periodontal inflammation.
Aloe vera gel showed additional benefit in reducing bleeding scores,
while antimicrobial photodynamic therapy showed additional enhanced activity
against periodontal pathogens and periodontal attachment level gain.
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