| 摘要 |
This invention relates to a dental appliance for displacing gingival tiss ue during a restoration procedure. The dental appliance comprises a flexible polyurethane foam pad having a central opening extending through the pad's thickness. The central opening is configured to receive a tooth therethrough , and the foam pad has a size, shape and flexibility sufficient to deflect gingiva l crest surrounding the tooth. The dental appliance can be made from an open celled foam that is effective to retain a medicament for release onto the gingival tissue. A temporary crown can be used to push the dental appliance over a prepar ed tooth and onto the gingival crest surrounding the tooth, such that the entir e gingival crest is simultaneously displaced.
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