Effect of toothbrush bristle stiffness and toothbrushing force on the abrasive dentine wear

Hamza, Blend; Tanner, Moritz; Körner, Philipp; Attin, Thomas; Wegehaupt, Florian J

doi:10.1111/idh.12536

Cited by 22 publications

(24 citation statements)

References 13 publications

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“…These two observations contribute to the current uncertainty regarding the influence of bristle stiffness on the abrasive dentin wear. In a recent study by Hamza et al 12 , where the same soft- and medium parallel tuft toothbrushes were used as in this study (M43), same amounts of abrasive dentin wear were also observed between the two kinds of bristle stiffness at 2- and 3-N brushing force. On the other hand, another study by Bizhang et al 27 reported that soft bristle toothbrush caused statistically significantly higher abrasive dentin wear than medium bristle toothbrush, which is actually in agreement with the present findings with the crossed tuft design.…”

Section: Discussionsupporting

confidence: 64%

“…It is worth mentioning that the soft bristles in the previous study of Hamza et al 12 caused statistically significantly less abrasive dentin wear than the medium bristles when the brushing force reached 4 N. This was attributed to the fact that the soft bristles deflected much more than the medium bristles at such brushing force and dragged less abrasive particles on the samples’ surface. Considering this finding, it could theoretically be assumed that crossed tuft design would rather prevent the bristles from getting deflected in comparison to the parallel tuft design, and therefore cause more abrasive wear.…”

Section: Discussionmentioning

confidence: 76%

“…For instance, a recent study reported that soft and medium bristles caused comparable abrasive dentin wear until 3-N brushing force was reached. Soft bristles, however, caused statistically significantly less abrasive dentin wear at 4 N 12 .…”

Section: Introductionmentioning

confidence: 82%

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Effect of the toothbrush tuft arrangement and bristle stiffness on the abrasive dentin wear

Hamza

Niedzwiecki

Körner

et al. 2022

Sci Rep

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The geometrical properties of toothbrushes play a role in developing abrasive tooth wear and non-carious cervical lesions. This study investigated the interplay between the toothbrush tuft arrangement (crossed vs. parallel) and bristle stiffness (soft vs. medium) on the abrasive dentin wear using three slurries with different levels of abrasivity (RDA: 67, 121 and 174). Twelve groups of bovine dentin samples (n = 20) were brushed with a combination of the aforementioned variables. Abrasive dentin wear was recorded with a profilometer and the resulting abrasive wear of each group was calculated and compared with each other using two-way ANOVA and pairwise tests. Toothbrushes with parallel tuft arrangement caused statistically significantly higher dentin wear compared to crossed tuft arrangement, regardless of the abrasivity level of the used slurry and the bristle stiffness. Soft crossed tuft toothbrushes caused statistically significantly higher abrasive dentin wear than medium crossed tuft toothbrushes, while soft and medium parallel tuft toothbrushes caused the same amounts of dentin wear, regardless of the RDA value of the used slurry. These results could be helpful for dentists and dental hygienists when advising patients. Crossed tuft toothbrushes could be a less-abrasive choice in comparison to parallel tuft toothbrushes.

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Section: Discussionsupporting

confidence: 64%

Section: Discussionmentioning

confidence: 76%

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Effect of the toothbrush tuft arrangement and bristle stiffness on the abrasive dentin wear

Hamza

Niedzwiecki

Körner

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…An alternative strategy to reduce the force transmitted to the teeth during brushing is to use softer bristles, and previous studies have investigated the relationship between bristle stiffness and abrasive dentine wear, a correlate of transmitted force [ 23 , 26 – 30 ]. However, whilst some studies suggest that softer bristles are associated reduced dentine abrasion [ 23 , 27 , 28 ], others indicate the opposite [ 26 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

“…This article reports data from two studies that assessed experimental toothbrush designs (GSK Consumer Health), which incorporates a flexible element in their necks, designed to look like a ball joint, between the toothbrush head and handle. Manual toothbrush users typically employ brushing forces of approximately 1.5–3.25 N, [ 17 – 21 ] and previous studies have shown that higher brushing force directly correlates with higher abrasive dentine wear [ 22 , 23 ]. These experimental product designs aim to change the angle of the brushing head towards the inbetween regions of buccal and lingual/palatinal tooth surfaces, and to reduce the brushing force that is transmitted to the tooth and gum surfaces.…”

Section: Introductionmentioning

confidence: 99%

Robot and mechanical testing of a specialist manual toothbrush for cleaning efficacy and improved force control

et al. 2022

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Background Toothbrushes require flexibility to access all dental surfaces and remove plaque effectively, but they should also aim to prevent or limit overbrushing and consequent damage to teeth and gums. In two studies, the physical properties and cleaning performance of specialist test toothbrushes with flexible necks were compared to a reference rigid-necked toothbrush. Methods In Study 1, a universal testing machine (Instron E 10,000) with a specially designed setup was used to test the deflection behaviour of toothbrush head and neck. Untufted toothbrushes were fixed in a custom holder and force was applied to the head while the deflection was measured. In Study 2, one control and five test toothbrushes were assessed using a robot system to simulate the cleaning of artificial plaque from defined surfaces of artificial replicated human teeth in a model oral cavity (typodonts). Results Study 1 showed that the flexible-neck toothbrush deflected 2 to 2.5 times more than the rigid-neck reference toothbrush when same force was applied to the toothbrush head. Study 2 revealed that all five test toothbrushes showed statistically superior simulated plaque removal to the reference toothbrush. This superiority was observed for all test toothbrushes employing horizontal and rotating brushing action (all p = 0.001) but only three of the five toothbrushes when vertical brushing was employed (all p = 0.001). Cleaning efficacy of the test toothbrushes was demonstrated both interdentally and at the gumline locations. The Complete Protection toothbrush showed the most effective cleaning performance followed by the Repair and Protect and Rapid Relief toothbrushes. Conclusion The addition of a flexible-neck component to the toothbrush designs helped to reduce stiffness and may allow more effective cleaning compared to rigid designs with controlled force distribution on the teeth and gums. This may help to provide plaque control at all potential risk areas in an in vitro robot model and could support good oral hygiene in-use.

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The prevalence, clinical features, and related factors of dentin hypersensitivity in the Turkish population

et al. 2022

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Effect of toothbrush bristle stiffness and toothbrushing force on the abrasive dentine wear

Cited by 22 publications

References 13 publications

Effect of the toothbrush tuft arrangement and bristle stiffness on the abrasive dentin wear

Effect of the toothbrush tuft arrangement and bristle stiffness on the abrasive dentin wear

Robot and mechanical testing of a specialist manual toothbrush for cleaning efficacy and improved force control

The prevalence, clinical features, and related factors of dentin hypersensitivity in the Turkish population

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