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27 July 2021: Laboratory Research

Disinfection of Infected Artificial Dental Periapical Lesions with Diode Laser: An In Vitro Study

Agron Bytyqi 1BDE , Xhevdet Aliu 2AD , Merita Barani 2BDF , David Stubljar 3CDE , Tomislav Jukic 4CDE , Andrej Starc 5CDE , Sokol Krasniqi 6ABDE*

DOI: 10.12659/MSMBR.932492

Med Sci Monit Basic Res 2021; 27:e932492

Table 1 Antimicrobial effectiveness of diode laser irradiation with mean percentage of dead Enterococcus faecalis and Streptococcus mitis cells.

Periapical lesion defectTreatment% of dead bacteriaP-value
E. faecalisS. mitis
6 mm,a Laser 5 min,b 73.65±5.8078.74±3.580.002
Laser 3 min,b 54.57±3.3952.84±2.450.285
Laser 1 min,b 46.71±3.6547.65±3.490.557
Positive control,b 26.47±1.4229.01±3.920.413
10 mm,a Laser 5 min,b 60.97±1.1259.58±2.340.387
Laser 3 min,b 47.39±2.0947.88±3.050.763
Laser 1 min,b 40.34±1.5640.18±1.330.923
Positive control,b 23.95±2.2725.28±0.990.633
14 mm,a Laser 5 min,b 49.03±3.7250.82±2.040.270
Laser 3 min,b 40.92±1.2441.68±1.920.640
Laser 1 min,b 32.71±1.8134.03±1.160.414
Positive control,b 25.44±0.7725.07±0.110.895
Superscript letters denote statistically significant differences obtained with post hoc testing.
a Lesion dimensions showed different overall results. Laser had greater disinfecting effect in smaller lesions showing higher percent of dead and cells (
b Five-minute laser irradiation showed differences in disinfection effectiveness compared to 3-min or 1-min laser irradiation in both microorganisms. Three-minute laser irradiation was more effective than 1-min irradiation. One-minute laser irradiation was the least effective, but it showed a statistically significant difference compared with the control nontreatment group;
c Interaction between lesion dimensions and laser irradiation time were correlated.
To obtain similar disinfecting efficacy as for smaller lesions, a longer irradiation time should be applied for larger lesions.

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Medical Science Monitor Basic Research eISSN: 2325-4416
Medical Science Monitor Basic Research eISSN: 2325-4416