In vitro Evaluation of Toothbrushing Abrasion by 4 Standard Toothbrushes

Abrasion is an important possible side-effect of individually used mechanical oral hygiene products which encouraged researchers to investigate products with less potential complications. This study examined brushing abrasion of 4 standard toothbrushes (Soft Oral-B, Medium Oral-B, Soft Panbeh-Riz and Medium Panbeh-Riz) in vitro. A specific mold was used to make samples by setting composite on acrylic resin. The samples were subjected to a 200 g force applied by toothbrushes connected to V8 Cross Brushing Machine for 18000 cycles in the solution of toothpaste with fluoride and distilled water. The samples were scaled before and after experiment and their weight loss measured after 3000, 6000, 9000, 12000, 15000 and 18000 cycles. Two way ANOVA and Tukey tests were used for statistical analysis. The study showed Soft Oral-B (Advantage) to produce the least abrasion among the four toothbrushes. Soft Panbeh-Riz had the most abrasion. Medium Panbeh-Riz and Medium Oral-B (Indicator) showed similar abrasion rate. The results showed that abrasion effects existed in all toothbrushes while it was increased with the increase occurred in number of cycles showing linear pattern.