Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Strontium is a naturally occurring element that is chemically similar to calcium and is found in small amounts in the human body, particularly in bones and teeth. The primary scientific interest in strontium for dental health comes from its ability to interact with hydroxyapatite, the mineral component of tooth enamel, and potentially strengthen it. Strontium salts, such as strontium chloride, have been included in certain toothpastes for decades, primarily for their ability to reduce tooth sensitivity (dentine hypersensitivity). Studies have demonstrated that strontium can occlude dentinal tubules, which helps in reducing sensitivity, but evidence for a direct benefit on tooth strength or cavity prevention is less robust. Some in vitro and animal studies suggest that strontium can enhance remineralization of enamel and dentin, and might reduce the solubility of enamel in acid, thereby offering some protection against caries. However, large-scale clinical trials specifically linking strontium supplementation or topical application to substantial improvements in human dental health are limited. The U.S. Food and Drug Administration (FDA) allows certain strontium compounds in over-the-counter desensitizing toothpastes, acknowledging their efficacy for sensitivity, but not for general dental health or cavity prevention. In summary, there is moderate scientific evidence supporting the use of strontium in dental products for reducing sensitivity, with weaker evidence for broader tooth health benefits.

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