| 摘要 |
A dental appliance comprising at least two plies of thermoformable materi al, wherein a first ply of a first material, having a first set of character istic properties, provides a first primary surface of the dental appliance a nd wherein a second ply of a material different from the first ply, having a second set of characteristic properties, provides an opposing second primar y surface of the dental appliance. Method of making such a dental appliance. |
