本文是:评价修复方法和材料对龈的反应;全冠外形的设计理论;修复体龈端边缘放置的标准。评价龈反应的方法:临床标准为龈的颜色、结构及探查出血,可能存在着医生的主观性。目前采用测定龈沟液体流量的方法为更客观,可估计临床症状明显之前的液体流量,随着龈炎的加重,龈沟液的流量增多,研究证明全冠边缘置于龈下,龈沟液量明显增加。设计冠外形的理论:应强调冠的外形能增进生理性清洁和口腔卫生。天然牙,从龈沟萌出时,其外形是平直的,且与外形高点 This article is: Evaluation of repair methods and materials response to the gingival; crown design theory; prosthesis margin gingival margin placement standards. Evaluation of gingival response: clinical criteria for the gingival color, structure and detection of bleeding, there may be a doctor's subjectivity. At present, the method of determining the fluid flow in the gingival sulcus is more objective, and the fluid flow rate before clinical symptoms can be estimated. As the gingivitis aggravates, the flow of gingival crevicular fluid increases. Studies have shown that the margin of the full crown is placed under the subgingival margin, Significantly increased. Theory of crown design: Emphasis should be placed on the shape of the crown to promote both physiological and oral hygiene. Natural teeth, eruption from the gingival sulcus, its shape is straight, and with high profile