Bonner, Brian C A randomised controlled trial to explore attitudes to routine scale and polish and compare manual versus ultrasonic scaling in the general dental service in Scotland [ISRCTN99609795]. [electronic resource] - BMC oral health Jun 2005 - 3 p. digital Publication Type: Journal Article ISSN: 1472-6831 Standard No.: 10.1186/1472-6831-5-3 doi