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Journal of Oral Laser Applications

Year 2002
Volume 2 , Issue 3

Pages: 175 - 180

Reduction of Specific Microorganisms in Periodontal Pockets with the Aid of an Nd:YAG Laser—An In Vivo Study

Norbert Gutknecht/Parastoo Raoufi/Rene Franzen/Friedrich Lampert

Purpose: The application of the Nd:YAG laser as an adjuvant possibility of treating periodontitis compared to conventional treatment on its own was investigated. Materials and Methods: This clinical study comprised twenty patients; the bacterial count served as the microbiological examination parameter, and the probing depth/bleeding on probing as the clinical examination parameter. Quantitative proof of three preiodontopathogenic germs (Actinobaciallas actinomycetemcomitans, Prevotella intermedia, Porphyromonas gingivalis) was found in each case with both a digoxigenin-marked 165-rRNA probe and a genomic DNA probe. A periodontal probe was used to determine the clinical parameter. Three quadrants per patient and one periodontium in need of treatment per quadrant were chosen for the study. In each patient, one periodontium was left untreated as a control, a second was treated with conventional subgingival curettage only, and the third was treated both conventionally and with a laser. All examination parameters were determined in each quadrant prior to treatment and one, three, and six months posttreatment. Results: The average bacterial counts in the quadrants treated with the adjuvant laser were always less than the values for the quadrants treated solely conventionally. The laser method produced statistically significantly better results, especially one week and one month after treatment. The clinical parameters probing depth and bleeding on probing were positively influenced by the adjuvant laser therapy. Conclusion: The effectiveness treating periodontitis with adjuvant laser was demonstrated. In terms of bactericidal efficacy, the application of the Nd:YAG laser proves to be a sensible and complementary therapeutic measure.


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