Radiographic interpretation can identify interproximal violations of biologic width
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However, with the more common locations on the mesiofacial and distofacial line angles of teeth, radiographs are not diagnostic because of tooth superimposition
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positive assessment can be made clinically by measuring the distance between the bone and the restoration margin using a sterile periodontal probe
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Vacek et al. reported biologic widths as narrow as 0.75 mm in some individuals, whereas others had biologic widths as tall as 4.3 mm