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Sometimes when a cavity progresses or a tooth is fractured past the gum tissue and a filling or crown needs to be placed, revealing more of the tooth structure is necessary. This is done by reflecting the gingival tissue around a tooth and, after temporarily displacing the soft tissue, predictably removing a given height of bone from around the tooth or teeth being treated. Biomechanical considerations: Biologic Width, Crown-to-root Ratio and Treatment Planning. Biologic width is the distance established by “the junctional epithelium and connective tissue attachment to the root surface” of a tooth. This distance is important to consider when fabricating dental restorations, because they must respect the natural architecture of the gingival attachment if harmful consequences are to be avoided.
