Department of Restorative Dentistry, University of Washington, Bellevue, WA, USA.
J Esthet Restor Dent. 2012 Aug;24(4):246-54. doi: 10.1111/j.1708-8240.2011.00473.x. Epub 2011 Sep 20.
This article describes a novel technique with the addition of a pressed porcelain abutment margin capable of bonding to the porcelain margin of an implant crown restoration. This allows for supragingival margin placement, reduces the potential effect of excess cement-induced peri-implant disease, and provides a controlled environment for the bonding process. Another advantage is the matching esthetics of the crown and supporting abutment, which in the event gingival recession occurs, the restoration appears as a longer tooth without the risk of exposing an underlying abutment margin with different esthetic properties.
The transition margin from an implant abutment to a crown is challenging to manage especially esthetically. Placing the abutment margin in a subgingival position helps hide the unesthetic transition, however, this reduces the ability to clean excess cement, increases the risk of peri-implant disease and the inability to control gingival sulcular fluids may affect the cement bond. The implant crown with an esthetic adhesive margin provides for supragingival bonded margins that can aid in complete removal of excess cement at the same time providing an esthetically pleasing result.
本文描述了一种新的技术，增加了一个压瓷基台边缘，能够与种植体冠修复体的瓷边缘结合。这允许龈上边缘放置，减少了过多的水泥引起的种植体周围疾病的潜在影响，并为粘结过程提供了一个可控的环境。另一个优点是冠和支持基台的匹配美学，如果发生牙龈退缩，修复体看起来像一个更长的牙齿，而不会有暴露基底边缘不同美学特性的风险。
种植体基台到冠的过渡边缘特别在美学方面很难处理。将基台边缘置于龈下位置有助于隐藏不美观的过渡，但这会降低清除多余水泥的能力，增加种植体周围疾病的风险，并且无法控制牙龈沟液可能会影响水泥粘结。带美容粘结边缘的种植体冠提供了龈上粘结边缘，可以帮助完全清除多余的水泥，同时提供美观的效果。
