title: Error variance and sensitivity associated with three different Periotron instruments.
mesh_terms: D001769:Blood; D002138:Calibration; D004867:Equipment Design; D005883:Gingival Crevicular Fluid / Q000378:metabolism; D005891:Gingivitis / Q000378:metabolism; D006801:Humans; D010517:Periodontics / Q000295:instrumentation*