Broderson S P
Quintessence Int. 1994 Aug;25(8):535-9.
A new concept for tooth preparation design for complete- and partial-coverage all-ceramic restorations is presented. Because of the efficacy of third-generation dentinal bonding agents, the preparations for complete-coverage and partial-coverage restorations can be made with less emphasis on retentive form. For partial-coverage restorations, cavosurface angles should be large so that the resultant configuration of the enamel rods is conducive to optimal bonding. The new preparations are simple, with extremely tapered axial walls, to allow maximum thickness of the ceramic material. These types of preparations result in finished restorations that are stronger and have better margins and less chance of microleakage. Long-term success of these types of restorations will be determined by the success or failure of the dentinal bonding agent and resin cement system used.
本文提出了一种用于全冠和部分冠全瓷修复体牙体预备设计的新概念。由于第三代牙本质粘结剂的有效性，全冠和部分冠修复体的预备可以较少强调固位形。对于部分冠修复体，洞缘角应较大，以使釉柱的最终形态有利于最佳粘结。新的预备方法很简单，轴向壁极度内聚，以允许陶瓷材料有最大厚度。这些类型的预备可使最终修复体更坚固，边缘更好，微渗漏的可能性更小。这些类型修复体的长期成功将取决于所使用的牙本质粘结剂和树脂水门汀系统的成败。
