Australian Dental Council (ADC) Practice Test

Dietary fiber intake is least likely to contribute to plaque accumulation because its primary function in the diet relates to digestive health rather than directly influencing oral hygiene or plaque build-up. Fiber-rich foods tend to promote better overall health, including the potential reduction of cavity-causing bacteria by facilitating chewing and salivation, which can help wash away food particles. Additionally, dietary fiber can help in the mechanical removal of debris from teeth as food is consumed.

On the other hand, factors such as tooth surface texture, salivary flow rate, and frequency of dental visits have a more direct impact on the formation and accumulation of plaque. Tooth surface texture can influence how easily plaque can adhere to teeth, with rougher surfaces allowing for easier accumulation compared to smoother ones. Salivary flow rate is crucial as saliva helps neutralize acids, remineralize enamel, and wash away food particles and bacteria, thus reducing plaque formation when flow is adequate. Frequent dental visits contribute to better plaque control through professional cleanings and preventive care, helping to minimize plaque accumulation effectively.

Understanding these factors clarifies the role of dietary fiber in relation to oral health, establishing why it is less relevant to the process of plaque accumulation.