A H AlShehab1, A A AlHazoom1, M H Alowa1, H A AlAli1, A A Abdulmohsen1, I Farooq2. 1. Dental Intern, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia. 2. Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
Abstract
OBJECTIVE: To compare the brushing abrasion carried out by manual toothbrushes with different bristle types (hard and soft) on normal and demineralized human enamel. MATERIALS AND METHODS: Thirty enamel blocks (N = 30) were prepared and were randomly divided into three main groups: A, teeth kept in artificial saliva with no brushing (control, n = 2); B, teeth brushed with toothbrushes with hard bristles (n = 14); and C, teeth brushed with toothbrushes with soft bristles (n = 14). Seven teeth belonging to groups B and C were brushed normally, and the remaining seven were demineralized before brushing experiments with 6 wt.% citric acid (pH = 2.2) for 5 minutes. The brushing experiments were carried out twice a day for 2 mins for 7 days inside a toothbrush simulation machine. The changes in the surface of enamel (prebrushing and post-brushing) were evaluated using non-contact profilometry. The results were analysed statistically using Kruskal-Wallis test and the Wilcoxon signed rank test. RESULTS: For both normal and demineralized enamel, toothbrushes with soft bristles caused more abrasion. The results revealed significant differences (P = .055) in the surface roughness values between the four groups prebrushing. Within each group, the prebrushing and post-brushing surface roughness value differences were all statistically significant (P < .05). CONCLUSIONS: The results demonstrate that soft bristles caused more abrasion as compared with the hard bristles. These results could have an impact on the toothbrush recommendations for patients.
OBJECTIVE: To compare the brushing abrasion carried out by manual toothbrushes with different bristle types (hard and soft) on normal and demineralized human enamel. MATERIALS AND METHODS: Thirty enamel blocks (N = 30) were prepared and were randomly divided into three main groups: A, teeth kept in artificial saliva with no brushing (control, n = 2); B, teeth brushed with toothbrushes with hard bristles (n = 14); and C, teeth brushed with toothbrushes with soft bristles (n = 14). Seven teeth belonging to groups B and C were brushed normally, and the remaining seven were demineralized before brushing experiments with 6 wt.% citric acid (pH = 2.2) for 5 minutes. The brushing experiments were carried out twice a day for 2 mins for 7 days inside a toothbrush simulation machine. The changes in the surface of enamel (prebrushing and post-brushing) were evaluated using non-contact profilometry. The results were analysed statistically using Kruskal-Wallis test and the Wilcoxon signed rank test. RESULTS: For both normal and demineralized enamel, toothbrushes with soft bristles caused more abrasion. The results revealed significant differences (P = .055) in the surface roughness values between the four groups prebrushing. Within each group, the prebrushing and post-brushing surface roughness value differences were all statistically significant (P < .05). CONCLUSIONS: The results demonstrate that soft bristles caused more abrasion as compared with the hard bristles. These results could have an impact on the toothbrush recommendations for patients.
Authors: Caroline de F Charamba; James Needy; Peter S Ungar; Frederico B de Sousa; George J Eckert; Anderson T Hara Journal: Clin Oral Investig Date: 2021-01-19 Impact factor: 3.573
Authors: Saqib Ali; Imran Farooq; Amr Bugshan; Intisar Ahmad Siddiqui; Khalifa S Al-Khalifa; Mohammed Al-Hariri Journal: J Taibah Univ Med Sci Date: 2020-12-14
Authors: Firas K Alqarawi; Mazen F Alkahtany; Khalid H Almadi; Afnan A Ben Gassem; Faris A Alshahrani; Mohammad H AlRefeai; Imran Farooq; Fahim Vohra; Tariq Abduljabbar Journal: Polymers (Basel) Date: 2021-05-12 Impact factor: 4.329