A rationale for comparison of plaque-retaining properties of crown systems.

The sequence of the initiation, formation, development, and maturation of dental plaque was reviewed. The gingival response to plaque formation was identified to control plaque growth for prolonged gingival health. A strong implication has been established between rough, overcontoured metal ceramic restorations and periodontal disease. Unsightly soft tissue around crowns result from increased plaque accumulation. In comparing esthetic crowns, three critical variables are considered. The factors that mediate plaque accumulation and influence gingival health at the tissue-restoration interface are (1) surface roughness, (2) marginal fit, and (3) contour. Minimizing plaque accumulation is crucial for gingival health.

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