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Swierkot K, Nonnenmacher CL et al. J Clin Periodontol 2009; 36: 240–249

Twenty-eight selected patients with generalised chronic periodontitis were randomly assigned to three treatment groups: the teeth of the patients in the first group were scaled quadrant-by-quadrant at one-week intervals, the second group underwent one-stage full-mouth scaling over a 24 hour period without chlorhexidine (CHX) and the third group received one-stage full-mouth scaling with CHX. Scaling was carried out using hand and ultrasonic instruments. Twenty-five patients completed the study. All three treatment approaches resulted in significant clinical improvement at 1, 2, 4, and 8 months after treatment. At 4 and 8 months, there were no differences between the treatment groups with regard to the clinical measurements.