[The basic analysis of friction sounds during root planing].
D003728:Dental Calculus / Q000628:therapy; D003777:Dental Prophylaxis / Q000295:instrumentation; D012534:Dental Scaling / Q000295:instrumentation; D006801:Humans; D008855:Microscopy, Electron, Scanning; D013016:Sound; D013057:Spectrum Analysis; D014092:Tooth Root / Q000601:surgery* / Q000648:ultrastructure