Baehni, P Effects of ultrasonic and sonic scalers on dental plaque microflora in vitro and in vivo. [electronic resource] - Journal of clinical periodontology Aug 1992 - 455-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0303-6979 Standard No.: 10.1111/j.1600-051x.1992.tb01156.x doi Subjects--Topical Terms: AdultAgedAlveolar Bone Loss--microbiologyBacteria--classificationBacterial Physiological PhenomenaColony Count, MicrobialDental Plaque--microbiologyDental Scaling--instrumentationHumansIn Vitro TechniquesMiddle AgedPeriodontal Pocket--microbiologySpirochaetales--isolation & purificationTime FactorsUltrasonic Therapy--instrumentationVibration