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Bactericidal effects of different laser systems on bacteria adhered to dental implant surfaces: an in vitro study comparing zirconia with titanium
Author(s) -
HauserGerspach Irmgard,
Stübinger Stefan,
Meyer Jürg
Publication year - 2010
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2009.01835.x
Subject(s) - streptococcus sanguinis , cubic zirconia , titanium , laser , biofilm , materials science , streptococcus mutans , irradiation , bacteria , dental implant , diode , in vitro , implant , chemistry , optoelectronics , medicine , optics , composite material , biology , metallurgy , surgery , ceramic , biochemistry , physics , nuclear physics , genetics
Objectives: The purpose of this study was to examine in vitro the anti‐bacterial efficacy of two different laser systems (CO 2 and diode) applied to Streptococcus sanguinis or Porphyromonas gingivalis cells in suspensions or adhered to zirconia or titanium dental implant materials, with two different surfaces each. Materials and methods: Bacteria were irradiated at two different power settings with either a CO 2 (λ=10,600 nm) or a diode laser (λ=810 nm). The lower mode is used clinically (for CO 2 100 J/cm 2 , diode 50 J/cm 2 ) and the higher may alter the materials' surface (for CO 2 1200 J/cm 2 , diode 150 J/cm 2 ). After irradiation, the number of viable bacteria was determined by culture. Results: Planktonic cells of both species were more resistant to the laser irradiations than bacteria that adhered to surfaces. Adhered P. gingivalis were effectively killed at both wavelengths λ=10,600 and 810 nm even at the lower settings, independent of the material. S. sanguinis cells that adhered to either zirconia surface were effectively killed by the CO 2 laser at the lower setting of 100 J/cm 2 . However, the higher settings of both lasers were needed to reduce S. sanguinis that adhered to titanium surfaces. The CO 2 laser at the lower setting and the diode laser at the higher setting effectively reduced the viability of S. sanguinis or P. gingivalis that adhered to zirconia surfaces. Conclusions: Under irradiation conditions known not to alter zirconia implant surfaces in vitro , both CO 2 laser (100 J/cm 2 ) and the diode laser (150 J/cm 2 ) effectively reduced the viability of adhered S. sanguinis or P. gingivalis . To cite this article:
Hauser‐Gerspach I, Stübinger S, Meyer J. Bactericidal effects of different laser systems on bacteria adhered to dental implant surfaces: an in vitro study comparing zirconia to titanium.
Clin. Oral Impl. Res . 21 , 2010; 277–283.
doi: 10.1111/j.1600‐0501.2009.01835.x