2022 Volume 14 Issue 2 Pages 144-149
All restoration materials are foreign matters for the organism. It is necessary to consider periodontal tissue and the relations of the tooth when restoration materials install subgingival margin. When restoration materials penetrates to the deep position in periodontal tissue, circumference tissue moves to apically to rebuild periodontal tissue or slight inflammation continues that is absorption and regeneration are repeated results by the circumference tissue of the high ability to regenerate. It is necessary it is diagnosed, and to consider the biotype of periodontal tissue of the patient next. The high-risk case of the aesthetic change may change periodontal tissue environment by connective tissue graft in a classification of biotype reported in the past. In addition, teeth contour are variously and restoration contour will be change at a setting position.