›› 2020, Vol. 40 ›› Issue (2): 188-192.

• Summary • Previous Articles    

Research progress of knife-edge margin for ceramic crown

  

  • Received:2019-07-22 Revised:2019-09-02 Online:2020-02-28 Published:2020-02-20
  • Contact: Fu-Ming HE E-mail:hfm@zju.edu.cn

Abstract: The relationship between the knife-edge margin of the all-ceramic crowns and periodontal tissues is deeply comprehended through the related literature and the effect of knife-edge margin on the fracture strength of all kinds of all-ceramic crowns is understood according to in-vitro test. An array of in-vivo clinical trial follow-up studies have revealed that crowns with knife-edge margin can obtain similar mechanical and periodontal tissue properties to other margin forms in the short- medium term, but the long-term properties still remain to be observed. This paper has some reference values for the future tooth preparation methods of the clinical all-ceramic restoration, and can give some guidance for obtaining fitter, healthier, and more lasting relationships between the restoration and periodontal tissue.

Key words: Knife-edge, Feather-edge, Crowns, Ceramics, Periodontics

CLC Number: