271 Kashering Braces or Dentures
People who are wearing braces in order to straighten their teeth or dentures should make sure not to eat hot chometz substances from twenty-four hours before the final time to eat chometz, or at least twenty-four hours before the final time when the braces or dentures are going to be kashered. The proper way to kasher the braces or dentures is the following: If they are removable, then before the final time to burn chometz, they should be cleaned very well to ensure that there is no visible trace, even the minutest trace, of chometz in every tiny crevice. Following the cleaning, boiling water should be poured on it from a kli sheini, a secondary vessel. If one is sure that the braces or dentures will not be damaged, they should pour the boiling water on them directly from the original source, i.e. the kettle or pot. A person who has braces or other dental appliances that are fixed in their mouth should clean them extremely well and ensure that not even the slightest trace of chometz is left. After this, they should drink water at the highest temperature that they can tolerate without burning themselves, so that the hot water will kasher the braces or dental appliances.