| 摘要 |
<p>A multifunction tooth sheath consists of a upper jaw tooth sheath made from a non-toxic and bio-compatible plastic film or sheet and having a form fitted with the upper jaw, and a lower jaw tooth sheath made from a non-toxic and bio-compatible plastic film or sheet and having a form fitted with the lower jaw. Said tooth sheath weared by a user who is eating can protect the tooth surface from direct contact with irritant food. The tooth sheath with perfume can eliminate foul breath, the tooth sheath with drug is helpful to cure odontia. If its colour is cream white, the tooth sheath will have a cosmetic effect.</p> |
