The claim is that they help prevent tooth decay, gum disease, and broken front teeth.
of the larger body of literature tend to come up short. The 2020 study published in The American Journal of Orthodontics and Dentofacial Orthopedics also analyzed 87 studies on the effects of malocclusion on oral health and didn’t find enough evidence to suggest that crooked teeth lead to poor health outcomes.
But others see things differently. “The cost-benefit [ratio] there is so low,” said Greco. “If you can readily correct a problem as a patient develops, you’d want to do that to give that patient every opportunity to develop normally, emotionally and mentally, physically,” Greco said. As a lecturer, Spassov was interested in incorporating a more critical discussion of evidence into his curriculum. However, he said that his colleagues dissuaded him. He says he was warned that incorporating evidence-based principles would confuse students. According to Spassov, it is easier and less confusing to just teach the same content each year. But that shouldn’t justify avoiding the topic entirely, he said.
Ackerman agrees that patients deserve nuanced and accurate information. In 2007 and again in 2018, he challenged the American Association of Orthodontists about specific claims on its website: namely, that malocclusion can cause loss of teeth, speech impediment, and poor nutrition. When asked for evidence to support these assertions, they dismissed the complaint with no real investigation, Ackerman said.
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