Xylitol, a naturally occurring five-carbon polyol sweetener, has gained significant attention for its dental health benefits. Unlike other polyol sweeteners such as sorbitol and maltitol, xylitol is not fermented by oral microbiota, leading to unique advantages in oral health. A systematic review of published data was done using various studies conducted over the past few decades to understand the caries-preventive effects of xylitol chewing gums and candies in children.
The Unique Properties of Xylitol
Xylitol stands out from other sweeteners due to its ability to promote mineralization by increasing saliva flow when used in chewing gum. Saliva plays a crucial role in neutralizing acids produced by bacteria in the mouth, thereby protecting teeth from decay. More importantly, xylitol consumption has been shown to reduce the acid production potential of dental plaque significantly. Several randomized clinical trials suggest that habitual xylitol gum consumption decreases counts of caries-associated mutans streptococci more effectively than sorbitol or other polyol gums.Clinical Evidence Supporting Xylitol
The clinical trials on xylitol date back to the 1970s with the Turku Sugar Studies, which demonstrated that substituting sucrose with xylitol resulted in virtually no new caries lesions. Subsequent studies have supported these findings:- Mutans Streptococci Reduction: Habitual xylitol gum chewing reduces counts of mutans streptococci.
- Plaque Reduction: Regular use also appears to reduce dental plaque amounts.
- Mother-Child Studies: Maternal consumption of xylitol has been linked to reduced early transmission of mutans streptococci and lower caries occurrence in children.
Key Findings from Recent Reviews
Our review aimed at evaluating literature from 1974–2022 reveals several key points:- Efficacy in High/Moderate Caries Levels:
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