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Can wear time, material composition, and manufacturing processes affect microplastic release from clear orthodontic aligners? A multidisciplinary in vitro study
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An in vitro study found that clear orthodontic aligners release microplastic fragments during wear, with replacement after 7 days potentially limiting the quantity of smaller particles released compared to longer wear periods. This raises questions about intraoral microplastic exposure from a widely used medical device, though the clinical significance and in vivo implications require further investigation.
Replacing CAs after 7 days may help limit MP release, particularly smaller fragments; however, the clinical significance of this finding remains unclear and requires further in vivo investigation.
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Microplastic Release from Clear Aligners: a Clinical Study
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Clear teeth aligners, the plastic trays used instead of metal braces, can shed tiny plastic particles into your saliva as you wear and chew with them, according to this study. Researchers found that factors like how long you wear them each day and how you clean them affect how much plastic breaks off, meaning your daily habits could influence how much of this material ends up in your mouth. Since scientists are still learning what micro- and nanoplastics do to the body long-term, this research highlights an overlooked source of exposure worth paying attention to as more people use clear aligners for orthodontic treatment.
Experimental assessment of damage and microplastic release during cyclic loading of clear aligners
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Researchers tested three popular brands of clear orthodontic aligners under simulated chewing conditions and found that all released microplastic particles during use. Since patients wear aligners for extended periods each day, this represents a direct and ongoing source of microplastic ingestion, raising questions about the cumulative exposure from dental devices that are growing in popularity.
A spectroscopic study on orthodontic aligners: First evidence of secondary microplastic detachment after seven days of artificial saliva exposure
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Researchers investigated whether clear orthodontic aligners release microplastics when exposed to artificial saliva over seven days. The study found evidence of microplastic detachment from aligners made by multiple manufacturers, representing the first documentation of secondary microplastic release from these dental devices. The findings raise questions about potential microplastic ingestion by the millions of people who use clear aligners.
Microplastic Release from Clear Aligners: a Clinical Study
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Clear plastic teeth aligners, worn by millions to straighten teeth, can shed tiny plastic particles (microplastics and even smaller nanoplastics) into your saliva as you chew and wear them over time. This study is the first to measure this shedding directly in people's mouths, looking at how wear time and cleaning habits affect how much plastic breaks off. Since we don't yet fully know the health effects of swallowing these particles, this research is an important first step in understanding a possible hidden source of microplastic exposure in everyday dental care.
Release of Microplastics and Chemical Compounds from Clear Orthodontic Aligners: A Narrative Review of the Current Evidence
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This review summarizes existing research on clear plastic orthodontic aligners, worn in the mouth, and whether they release chemicals and tiny plastic particles as they wear down. Lab studies found that aligner surfaces can develop roughness and tiny cracks, sometimes releasing chemicals and microplastics, but most evidence comes from lab models rather than real-world use in people.
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