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While it is known that oral hygiene and dietary choices promote tooth decay, a new study has found that genetics also plays a role in the cavity formation. 

According to the study, keratins, proteins associated with strong hair, are important for tooth enamel integrity.

Researchers found that individuals with mutations in hair keratin genes are prone to cavities. They also noted that tooth enamel from individuals with keratin mutations had abnormal structure that resulted in weakness.

The findings of the study reveal a link between hair disorders and cavity formation. 

The study was detailed in the Journal of Clinical Investigation.