This article describesa common gum issue that occurs as a result of fixed prosthodontics therapy, this common gumissueis called gum inflammation (gingivitis).Effective oral hygiene practices can help reduce gingival inflammation, even if improper crown and bridge margins can contribute to biofilm development, gingival sulcus fluid flow, and alveolar bone loss. These conditions can result in micro leakage, recurrent caries, and fixed dental prosthesis failure. The article highlights how the preparation of crown, contour, and appearance of fixed dental restorations can impact the surrounding gingival tissues. Rough, irregular surfaces and marginal gaps create a favorable environment to bacterial colonization and plaque formation. Additionally, the impression quality and internal fit of the dental prosthesis are critical for retention and longevity. Supragingival crown margins are shown to have more favorable effects on the gingival tissues compared to subgingival crown margins. The research highlights the significance of identifying the biologic width, which is roughly 2 mm, and suggests preserving at least 3 mm of intact tooth structure between the alveolar bone and the dental prosthesis edge. Failure to maintain these dimensions can lead to increased gum inflammation, attachment loss, and gingival recession, finally impacting the success and longevity of the fixed dental prosthesis.