The WBA heavyweight title fight that took place in June 1997 will always be referred to as "The Bite Fight." That’s because it's when Mike Tyson bit off part of Evander Holyfield's ear.

These days, kids are having a much tougher bite fight, as they develop so-called cheese molars —permanent teeth with a pale-yellow color and a compromised enamel coating.

Also known as molar incisor hypomineralization, or MIH, this condition causes teeth to chip and break, and it makes them very sensitive to hot and cold.

For years, dentists and pediatricians have looked for a way to prevent this condition. Finally, a team of endocrinologists in Paris may have figured it out.

They were able to trigger development of cheese molars in lab rats by experimenting with the effects of the endocrine disruptor bisphenol A (BPA), which is found in plastics and on store receipts, as well as the agricultural fungicide vinclozolin.

Avoiding those triggers may be the solution.

In 2006, vinclozolin was banned in Denmark, Finland, Norway, and Sweden. It is now being phased out in the United States as well.

But BPA and its cousin, BPS, are still widely used. So buy goods packaged in glass whenever possible, avoid handling receipts and wash your hands after touching them.

You can also opt for the safest plastics which include nylon, safe for one-time use; high-density polyethylene; low-density polyethylene; and polypropylene.