Effect of malachite green, ocimum sanctum, and Er, Cr: YSGG laser on antimicrobial activity against S.mutans and CAD disinfection bonded to resin restoration

Khold Al Ahdal; Ahmed M Maawadh; Laila Al Deeb; Ahoud S Alshamrani; Thamer Almohareb; Ali Alrahlah

doi:10.1016/j.pdpdt.2023.103571

Effect of malachite green, ocimum sanctum, and Er, Cr: YSGG laser on antimicrobial activity against S.mutans and CAD disinfection bonded to resin restoration

Photodiagnosis Photodyn Ther. 2023 Jun:42:103571. doi: 10.1016/j.pdpdt.2023.103571. Epub 2023 Apr 14.

Authors

Khold Al Ahdal¹, Ahmed M Maawadh¹, Laila Al Deeb¹, Ahoud S Alshamrani¹, Thamer Almohareb¹, Ali Alrahlah²

Affiliations

¹ Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
² Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia. Electronic address: aalrahlah@ksu.edu.sa.

PMID: 37062512
DOI: 10.1016/j.pdpdt.2023.103571

Abstract

Aims: Evaluation of survival of S.mutans and shear bond strength (SBS) of adhesive restorative material bonded to carious affected dentin (CAD) after using cavity disinfectant i.e., Er, Cr: YSGG (ECYL), (Nd: YAG) (NYL), Malachite green (MG), Ocimum sanctum (OS) in comparison to the conventional control chlorhexidine gluconate (CHX).

Materials and methods: Seventy-five caries-affected mandibular third molars having ICDAS scores 4 and 5 were included. Carious infected dentin was eliminated and CAD surface was obtained. On twenty-five samples, an uncontaminated suspension of S. mutans strain ATCC 35,668 in Brain-Heart Infusion broth (BHI) was obtained after 12 h of incubation at 37 °C. Based on the disinfection regime used to sterilize the CAD surface, all the specimens were allocated into five different groups. (n = 15) Group 1: CAD disinfected with CHX, Group 2: CAD disinfected with ECYL, Group 3: CAD disinfected with NYL, Group 4: CAD disinfected with MG, and Group 5: CAD disinfected with OS. An assessment of the survival rate of S. mutans was performed. Fifty specimens were smeared with single-step adhesive bond followed by restoring the CAD surface using packable composite. SBS and failure mode were determined using a universal testing machine and stereomicroscope at 40x magnification. ANOVA and post-hoc Tukey-Kramer test was used for data analysis p = 0.05.

Results: Group 1: CHX-treated specimens displayed the lowest bacterial viability (0.11±0.03 CFU/mL). However, group 4: MG exhibited the highest bacterial survival (0.15 ± 0.09 CFU/mL). The highest and lowest SBS of resin adhesive bonded to disinfected CAD surface were exhibited by (group 5: OS) (21.48±1.39 MPa) and (group 3: NYL) (16.41±0.90 MPa) respectively (p>0.05).

Conclusion: Ocimum sanctum seems to be promising in terms of its antibacterial efficacy against S.mutans and positive impact on SBS of resin adhesive to CAD surface.

Keywords: Malachite green; Nd:YAG; Ocimum sanctum; Photodynamic Therapy; Shear bond strength.

MeSH terms

Dentin / chemistry
Disinfectants*
Disinfection
Lasers, Solid-State*
Materials Testing
Ocimum sanctum
Photochemotherapy* / methods
Photosensitizing Agents

Substances

malachite green
Photosensitizing Agents
Disinfectants
single bond