Lambert R L, Goldfogel M H
J Prosthet Dent. 1985 Jul;54(1):10-2. doi: 10.1016/s0022-3913(85)80058-5.
The principles of cavity preparation, retention, pin placement, and finishing of the pin amalgam restoration differ in several respects when applied to the pin amalgam when it is intended to serve as a foundation for a cast restoration. A more conservative extension and removal of undermined enamel is indicated because the amalgam will be covered with a cast restoration. The axial reduction required during crown preparation frequently reduces retention of the pin amalgam foundation; therefore, it is necessary to plan for those alterations during the cavity preparation. The degree of finishing and polishing required is determined by the length of time the pin amalgam foundation is expected to function as an interim restoration.
当银汞桩修复体用作铸造修复体的基础时，其窝洞预备、固位、钉道设置和修整的原则在几个方面有所不同。由于银汞合金将被铸造修复体覆盖，因此建议采用更保守的扩展方式并去除无基釉质。牙冠预备时所需的轴向磨除常常会降低银汞桩基础的固位力；因此，在窝洞预备期间有必要针对这些改变进行规划。所需的修整和抛光程度取决于银汞桩基础作为临时修复体预期发挥功能的时间长度。
