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sulcus bleeding index


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(SBI)

An index of gingival inflammation in which bleeding is measured from four gingival units (mesial and distal papillary units and labial and lingual marginal units), using a periodontal probe with a 0.5mm diameter tip. The scoring range around eight anterior teeth (four maxillary and four mandibular) is from 0 (healthy appearance and no bleeding on probing) to 5 (spontaneous bleeding with a marked swelling, and a change in colour).


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