Klugman R, Revah A, Kohavi D, Rehany A, Stern N
Refuat Hapeh Vehashinayim. 1978 Oct;27(4):31-5, 31-4.
Ideally, all finish lines should be placed supragingivally. Due to esthetic and carious considerations, however, subgingival placement of the finish line is preferred. No one type of finish line can be used for all crown preparations. In lower anterior teeth or periodontically-treated teeth, the knife-edge finish line appears to be the treatment of choice. In short teeth and preparations for porcelain and porcelain-gold crowns, the full shoulder bevelled preparation is the treatment of choice. In full gold and acrylic veneered gold crowns, as in endodontically-treated teeth, the chamfer preparation is the treatment of choice.
理想情况下，所有边缘线都应置于龈上。然而，出于美观和龋病方面的考虑，边缘线置于龈下更为可取。并非所有类型的边缘线都适用于所有全冠预备。在下颌前牙或经过牙周治疗的牙齿中，刃状边缘线似乎是首选的治疗方式。在短牙以及烤瓷和金瓷冠的预备中，全肩台斜角预备是首选的治疗方式。在全金冠和丙烯酸树脂贴面金冠中，如同经过牙髓治疗的牙齿，肩台预备是首选的治疗方式。
