title: The influence of two ultrasonic tips on root surfaces--in vivo.
authors: Department of Periodontology, Oregon Health Sciences University, School of Dentistry, Portland.
authors: S M
authors: SM
authors: Clark
mesh_terms: D012534:Dental Scaling / Q000295:instrumentation*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010518:Periodontitis / Q000628:therapy; D013499:Surface Properties; D014092:Tooth Root / Q000648:ultrastructure*; D014464:Ultrasonic Therapy / Q000295:instrumentation*