The effects of load and toothpaste on powered toothbrush vibrations

Research output: Contribution to journalArticle

Colleges, School and Institutes


OBJECTIVES: The primary cleaning action of powered toothbrushes is the motion of the bristles in contact with the tooth surfaces. The aim of this study was to use scanning laser vibrometry to determine the effects of load and toothpaste on the bristle vibration characteristics of four powered toothbrushes (Oral-B Sonic Complete; Oral-B Professional Care 8000 Series; Sonicare Elite and Ultrasonex). METHODS: Toothbrushes were initially scanned, with the laser vibrometer, under unloaded conditions to provide baseline readings. Toothbrushes were then assessed under loaded conditions (1.00 N and 2.00 N), with and without toothpaste, to observe the effect on bristle motion. RESULTS: Application of 1.00 N load significantly reduced the displacement amplitudes of all powered toothbrushes (p0.497). With toothpaste, 1.00 N load caused a significant decrease in vibration displacement amplitude for all brushes (p


Original languageEnglish
Pages (from-to)350-354
Number of pages5
JournalJournal of Dentistry
Issue number4
Publication statusPublished - 1 Jan 2007


  • periodontology, powered toothbrush, vibration, laser vibrometry