Abstract:
The objective of this In- vitro study was whether there is a difference in signs of wear of electric powered toothbrushes of different mode of operation and price level. Three different electric powered toothbrushes ( Oral- B ProfessionalCare 1000, Oral- B Vitality D12013 and Philips Sonicare HX6711/02) were tested sequentially on a self designed test rig. Each exemplar was tested with five brushes, moving over a row of artificial Frasaco- teeth covered by a suspension of toothpaste. Each brush was tested for 280 to 340 minutes before being replaced by a new one.
The durability of the accumulator, the macroscopic decolouration of the indicating bristles, the deformation of the brushes and the microscopic changes at the tips of the bristles have been evaluated within this study.
The durability of the accumulator differed clearly from the manufacturers data in some cases.
The wear of brush mechanism of the Oral- B brushes was unremarkable.
The macroscopic decolouration of the indicating bristles and the deformation of the brushes appeared clearly before the manufacturers recommended term of replacement which would be three months.
During the tests a brown suspension appeared at the backside of the Oral-B brushes. The origin of this suspension could not be identified.
The vitality brush showed a lower rate of deformation of the bristles than the competitors models.
By the means of scanning electron microscope, the deformation during use was demonstrated, starting with a uniform rounding of the tips of the filaments and ending with a central plateau after 280 minutes of practice.
Considering the excellent durability of the accumulator of the Sonicare and the appearance of the brown suspension at the Oral- B models, the Sonicare should be preferred.
In addition, the recommendation for replacement time of the brushes should be decreased from three to two and a half months.