Lasance Florance A, Gubler Andrea, Attin Thomas, Wegehaupt Florian J
Oral Health Prev Dent. 2024 Dec 17;22:681-688. doi: 10.3290/j.ohpd.b5883989.
To investigate the impact of manual toothbrush usage duration and associated wear on cleaning performance in a tooth model with fixed orthodontic appliances.
Black resin teeth with attached brackets were coated with a white layer of titanium dioxide and subjected to brushing using a brushing machine. Two distinct brushing motions, horizontal and circular, were tested. Following each brushing session, the percentage of cleaned areas (total and adjacent to the bracket) was measured to determine the cleaning performance of the toothbrushes. Usage was simulated using a 3D-printed tooth relief with brackets and wire. Cleaning performance was re-evaluated after simulated 2, 4, 6, 12, 18 and 24 months of usage, and toothbrush wear was quantified respectively.
Cleaning performance of all investigated brushing motions and tooth areas improved during the test period, although statistical significance was only reached for horizontal brushing. Furthermore, horizontal brushing proved more effective regarding total tooth area and the area adjacent to the bracket compared to circular brushing.
This in-vitro data shows that toothbrushes may feature sufficient or even improved cleaning performance on teeth with orthodontic appliances even after 24 months. However, direct transferability into the clinical setting is limited, as in-vivo toothbrush wear is complex and depends on individual patient habits, and other factors might necessitate an earlier toothbrush change. Nevertheless, this study suggests that cleaning performance and thus oral hygiene in patients with orthodontic appliances may not be critically dependent on usage duration and visual appearance of the toothbrush itself.
研究在带有固定正畸矫治器的牙齿模型中，手动牙刷的使用时长及相关磨损对清洁性能的影响。
带有附件托槽的黑色树脂牙表面涂覆一层白色二氧化钛，使用刷牙机进行刷牙。测试了两种不同的刷牙动作，即水平刷牙和圆周刷牙。每次刷牙后，测量清洁区域（总的及托槽附近的）百分比，以确定牙刷的清洁性能。使用带有托槽和钢丝的3D打印牙齿模型来模拟使用情况。在模拟使用2、4、6、12、18和24个月后重新评估清洁性能，并分别对牙刷磨损进行量化。
在测试期间，所有研究的刷牙动作和牙齿区域的清洁性能均有所改善，不过只有水平刷牙达到了统计学显著性。此外，与圆周刷牙相比，水平刷牙在整个牙齿区域和托槽附近区域更有效。
该体外数据表明，即使在24个月后，牙刷对带有正畸矫治器的牙齿仍可能具有足够甚至更好的清洁性能。然而，由于体内牙刷磨损情况复杂且取决于个体患者习惯，以及其他因素可能需要更早更换牙刷，因此该结果直接应用于临床的局限性较大。尽管如此，本研究表明，正畸患者的清洁性能以及口腔卫生状况可能并不严重依赖于牙刷的使用时长和外观。
