PCL and TPU based materials have been tried and patented for dental applications. Most notably, a PCL-based root canal filler marketed under the tradename Resilon was introduced in 2004. However, it was pulled from the market years after following anecdotal reports of poor device performance. Later clinical and retrospective studies found that Resilon-filled root canals had higher degradation rates and were 5-fold more likely to present with lesions than the conventional root canal filler material (gutta-percha). It was suggested that, at least in part, device failure was due to the degradability of PCL and the material succumbing to microbial attack in the mouth. In response to social media posts by consumers using moldable plastics to create temporary teeth, dental professionals have warned of choking hazards, inflammation, and the potential for more serious tooth decay from trapped food. Moldable plastics sold for dental applications can be considered as either "temporary crown and bridge resin" or "tooth shade resin material", 155,156 making them class II medical devices. Thus, they are regulated by the U.S. FDA via the 510(k) pathway, requiring premarket notification to "clear" the product before commercial distribution. None of the analyzed moldable plastics were listed on the U.S. FDA 510(k) premarket notification database (Tables S6-S7) nor any other FDA database as approved, cleared, or authorized medical devices. In fact, many included a legal disclaimer on their Amazon.com webpage stating their lack of U.S. FDA evaluation. Based on the number of reviews of these products and their content, many users have enjoyed having a lowcost, over-the-counter solution for their dental challenges, particularly when practiced dentistry may be out of reach. A market for these products is unsurprising as it is estimated that ~52% of Americans are missing at least one tooth. Regardless, consumers deserve transparency about the products they purchase to make an informed decision, particularly regarding their health and choice of treatment.