Marginal discrepancy in base metal alloys: A systematic review and meta analysis

The marginal fit is one of the most important criteria for long-term success of all-ceramic restorations.[1] When considered clinically, a casting becomes acceptable only when the marginal gap between the prepared tooth and the casting is indiscernible both visually and also while probing. The marginal gap may lead to increased retention of plaque. This changes the distribution of microflora as the marginal gap becomes a protective space for microorganisms. This paves way for secondary caries and periodontal disease. Furthermore, microleakage under the restoration may cause endodontal inflammation and hypersensitivity.[2-4] The marginal fit of restorations is governed by many factors such as perceptive tooth preparation, accurate impressions, type of casting metal used, precision casting, and careful finishing.[3] The crowns and copings are manufactured either from base metal alloys ABSTRACT