Influence of different ultra-soft toothbrushes on erosive tooth wear

Pereira, Talita Portela; Vieira, Thais Abranches Franco; Júnior, Wilton Lima dos Santos; Bezerra, Sávio José Cardoso; Sobral, María Angela Pita; Scaramucci, Taís

doi:10.1016/j.jdent.2023.104502

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…Other experimental comparisons have been made on thin-bristled toothbrushes (ultrasoft toothbrushes) [6]. In this study, it is demonstrated that different types of ultra-soft toothbrushes have a different effect on the progression of erosive tooth wear as a function of the substrate (dentine or enamel).…”

Section: Introductionmentioning

confidence: 77%

Numerical and Machine-Aided Experimental Models for Simulating the 3D Compliance of a Toothbrush

Cirelli,

Cellupica,

D’Angelo

et al. 2023

Machines

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One of the most discussed topics in toothbrush design is identifying the contact force exerted by the bristles on the teeth. Each bristle must generate a contact force to ensure tooth cleaning without damaging it. Numerical simulation is a very powerful tool for understanding the influence of design parameters (bristle shape and materials). This paper proposes a flexible multibody model to efficiently simulate the 3D compliance of a toothbrush. Each bristle is modeled using a discrete, flexible approach. The contact between the bristles and the target surface is established using the penalty contact method. An experimental test bench with a Universal Robot and a flat, transparent surface is set up. Validation is provided by comparing the reaction forces of the toothbrush with the reaction forces acquired by the load cells mounted on the end effector of the Robot. The results demonstrate the accuracy of estimating normal and tangential forces in various operating situations. The discrete flexible multibody technique has also demonstrated its viability in evaluating the displacement of the bristles when the toothbrush’s base body is put through a specified motion, even when it is exposed to a sudden change in direction. As a result, the model can be effectively utilized to assess how well various brush classes remove dental plaque. Therefore, the suggested model could provide guidance for holistic modeling and advancements in toothbrush design to boost their effectiveness for thorough cleaning.

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Section: Introductionmentioning

confidence: 77%

Numerical and Machine-Aided Experimental Models for Simulating the 3D Compliance of a Toothbrush

Cirelli,

Cellupica,

D’Angelo

et al. 2023

Machines

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Effectiveness and safety of biosilicate‐enhanced bleaching gels on enamel with early erosion lesion

Dascanio,

de Oliveira Ribeiro,

Coelho

et al. 2024

J Esthet Restor Dent

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AimThis study evaluated the efficacy and cytotoxicity of 35% hydrogen peroxide (HP) gel incorporated with 10% (w/w) biosilicate (BioS) on sound enamel and early‐stage enamel erosion lesions.MethodsDiscs of enamel/dentin were selected, subjected to erosive cycles (0.3% citric acid, pH 2.6), and treated with (n = 8): HP (35% HP, positive control); HP_BioS [carboxymethyl cellulose (CMC) + HP + BioS]; BioS (CMC + BioS); CMC (negative control). The discs were adapted to artificial pulp chambers with the enamel exposed for bleaching, and the dentin facing toward the culture medium (Dulbecco's modified Eagle's medium [DMEM]). Bleaching was performed in three 30‐min sessions at 7‐day intervals. After bleaching, the diffusion product (DMEM extract + diffused HP) was pipetted onto MDPC‐23 odontoblastic cell line and inoculated. Color parameters (ΔL, Δa, Δb), color change (ΔE00), and changes in whiteness index (ΔWID) were determined before (T0) and after the last bleaching session (T3). Cell viability (MTT, %), H2O2 diffusion (μg/mL), oxidative cell stress (OxS), and cell fluorescence (live/dead assay, in confocal microscopy) were assessed (ANOVA/Tukey; α = 0.05).ResultsNo difference in ΔL, Δa, Δb, ΔE00, and ΔWID were found between HP and HP_BioS (p > 0.05). The incorporation of BioS decreased the HP diffusion into the substrates and mitigated oxidative stress in early‐stage eroded enamel (p < 0.05). HP_BioS presented significantly higher cell viability compared with HP under erosion conditions. Live/dead assay indicated that BioS_HP maintained viability with larger clusters of viable cells.ConclusionIncorporating BioS into HP maintained bleaching effectiveness, favored cell viability, reduced the oxidative stress, and the cytotoxicity in teeth with early‐stage erosion.Clinical SignificanceBioS formulation showed promising results for reducing cytotoxicity in patients seeking tooth bleaching and presenting undetectable early‐stage erosion.

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Childhood early oral ageing syndrome: prevalence and association with possible aetiological factors and consequences for the vertical dimension of occlusion: protocol for a cross-sectional study

Spinola,

Sobral,

Mandetta

et al. 2024

BMJ Open

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IntroductionChildhood early oral ageing syndrome (CEOAS) is a condition involving oral abnormalities resulting from systemic diseases of different origins that are related to the current lifestyle of the paediatric population. Enamel defects associated with intrinsic and extrinsic factors promote the early loss of tooth structure at an accelerated pace, with negative impacts on function, aesthetics and quality of life. The aim of the study is to identify the prevalence of early tooth wear in childhood and its severity using the CEOAS index, which is a tool for the diagnosis of the condition and for epidemiological surveys, involving the investigation of abnormalities of the oral cavity in the paediatric population and possible factors associated with the severity of the condition.Methods and analysisChildren aged 3–6 years will be recruited from the paediatric clinic of Universidade Nove de Julho. Children with amelogenesis imperfecta, dentinogenesis imperfecta and genetic syndromes, as well as those undergoing orthodontic treatment will be excluded. A questionnaire will be administered addressing general health, sleep quality, dietary habits, oral hygiene habits and parafunctional habits. Clinical examinations will then be performed using the novel CEOAS index to assess tooth wear (scores 0–3) and determine the occurrence of enamel defects (scores I–III). The vertical dimension of occlusion (VDO) will also be measured. The CEOAS scores will be computed for the deciduous dentition and analysed statistically, with the significance level set at 5% (p<0.05).Ethics and disseminationThis protocol has been approved by the institutional review board of Universidade Nove de Julho (process number: 6.713.724. Approved on 20 March 2024). The results will be submitted to international peer-reviewed journals and presented at international conferences.Trial registration numberwww.clinicaltrials.gov,NCT06381414. Registered 23 April 2024.

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Influence of different ultra-soft toothbrushes on erosive tooth wear

Cited by 4 publications

References 28 publications

Numerical and Machine-Aided Experimental Models for Simulating the 3D Compliance of a Toothbrush

Numerical and Machine-Aided Experimental Models for Simulating the 3D Compliance of a Toothbrush

Effectiveness and safety of biosilicate‐enhanced bleaching gels on enamel with early erosion lesion

Childhood early oral ageing syndrome: prevalence and association with possible aetiological factors and consequences for the vertical dimension of occlusion: protocol for a cross-sectional study

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