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Research Journal of Pharmacy and Technology
Year : 2020, Volume : 13, Issue : 7
First page : ( 3311) Last page : ( 3316)
Print ISSN : 0974-3618. Online ISSN : 0974-360X.
Article DOI : 10.5958/0974-360X.2020.00587.9

Comparative Effect of laser treatment on Streptococcus mutans Biofilm adhered to Dental implant surface

Dr. Ali Samar1,*, Salameh AL, Alammory Mustafa2, Hamadah Omar3

1Department of Basic Science, Faculty of Dentistry, Damascus University, Damascus, Syria

2Department of Biochemistry and Microbiology, Faculty of Pharmacy, Damascus University, Damascus, Syria

3Department of Oral Pathology, Faculty of Dentistry, Damascus University, Damascus, Syria

*Corresponding Author E-mail: alisaly474@gmail.com

Online published on 10 August, 2020.



This study examined carbon dioxide laser (CO2; 10,600nm), diodelaser (810nm), and erbium (Er): yttrium-aluminum-garnet (YAG; 2,940nm) laser applications on Streptococcus mutans contaminated sandblasted surface titanium implants and performed a comparative evaluation of the bactericidal effects.

Materials and Methods

This study was carried out in 4 groups: Er: YAG laser in short pulse (SP) emission mode, diode laser with a 320-nm fiber optic and CO2 laser. After laser irradiation, dilutions were spread on sheep blood agar plates and, after an incubation period of 24 hours, colony-forming units were counted and compared with the control group, and the bactericidal activity was assessed in relation to the colony counts.


The CO2 laser reduce bacterial count 5 logs at 4 W, the continuous-wave diode laser decrease the count of bacteria 4.66 logs at 1 W, and The Er: YAG laser reduce bacterial count 4.5 logs at 90 mJ and 10 Hz.


The results of this study show that effective elimination of surface bacteria on titanium surfaces could be accomplished in vitro using a CO2, diode, or Er: YAG laser as longas appropriate parameters are used.



CO2 laser, Er-YAGlaser, diode laser, Streptococcus mutans, biofilm, dental implant.


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