title: The periotron gingival crevicular fluid meter. An assessment of three different instruments.
mesh_terms: D002138:Calibration; D003762:Dental Instruments / Q000592:standards*; D004867:Equipment Design; D005883:Gingival Crevicular Fluid / Q000378:metabolism*; D005891:Gingivitis / Q000378:metabolism*; D006801:Humans; D010209:Paper; D013594:Syringes