| 摘要 |
<p>A dental appliance comprising at least two plies of thermoformable material, wherein a first ply of a first material, having a first set of characteristic properties, provides a first primary surface of the dental appliance and wherein a second ply of a material different from the first ply, having a second set of characteristic properties, provides an opposing second primary surface of the dental appliance. Method of making such a dental appliance.</p> |
