Ackerman M B
University of Pennsylvania School of Dental Medicine, Philadelphia, USA.
Compend Contin Educ Dent. 1997 Nov;18(11):1131-8, 1140; quiz 1142.
The full coverage restoration (FCR) and its effect on the periodontium have been the subject of much controversy over the last half century. The conflict relates to whether the margin of the FCR should be placed at or above the gingival crest, or into the gingival crevice. Clinicians and researchers alike have focused their attention primarily on the mechanistic aspects of fixed prosthetic design (i.e., marginal configuration and fit). Although marginal quality and form are factors in the fabrication of the FCR, they alone will not determine periodontal health and restorative success. What determines the success of the FCR is its ability to restore form and function to the masticatory system without adversely affecting its biology. Each technical phase of treatment (i.e., tooth preparation, impression-taking, the provisional restoration, and the final restoration) must be performed within the limits of biologic adaptation. This literature review discusses the scientific evidence regarding FCR margin placement and periodontal health.
全冠修复（FCR）及其对牙周组织的影响在过去半个世纪一直是诸多争议的主题。争议点在于FCR的边缘应置于龈嵴处或龈嵴上方，还是应进入龈沟。临床医生和研究人员都主要将注意力集中在固定修复体设计的机械方面（即边缘形态和贴合度）。尽管边缘质量和形态是FCR制作中的因素，但仅凭它们并不能决定牙周健康和修复的成功与否。决定FCR成功的是其在不对咀嚼系统生物学产生不利影响的情况下恢复其形态和功能的能力。治疗的每个技术阶段（即牙体预备、取印模、临时修复和最终修复）都必须在生物适应性的限度内进行。这篇文献综述讨论了关于FCR边缘位置与牙周健康的科学证据。
