Reliability of bleeding and non-bleeding on probing to gingival histological features.
Given the extensive use in periodontal diagnosis of the clinical sign of bleeding on probing, the reliability of the technique in relation to gingival histological features and the need for a better understanding of its significance was investigated. Bleeding (B) and non-bleeding (NB) buccal gingival tissues, were measured through manual probing during gingivectomy procedures. The histological evidence of inflammation was used as the gold standard. The established histological descriptive patterns showed statistically significant differences between B and NB sites (chi2 = 20.842, p < 0.05). The reliability scores were found to be of high sensitivity (90.9%) and negative predictive value (89.5%) as well as of fair specificity (77.3%) and positive predictive value (80%). The accuracy was found to be 84.1%. The histological quantitative analysis showed no statistically significant difference for any HGI (Histological Gingival Index). B sites presented HGI = 1 in 72.8%, close to the NB sites, which showed 63.4% for the same histological score. Furthermore, Pearson's analysis showed a low correlation between the studied clinical signs and the histological quantitative analysis (r = 0.265, p > 0.05). We conclude that the clinical parameter of bleeding on probing is a reliable tool for diagnosing gingival inflammation, whereas the clinical sign of non-bleeding on probing is not a safe criteria for evaluating gingival health.
de Souza
Patrícia Helena Rodrigues
PH
Discipline of Periodontology, Dentistry School, Educational Foundation of Barretos, São Paulo, Brazil. patricia@barretos.com.br
de Toledo
Benedicto Egbert Corrêa
BE
Rapp
Gisela Estela
GE
Zuza
Elizangela Partata
EP
Neto
Carlos Benatti
CB
Mendes
Ary José Dias
AJ
D000328:Adult; D016009:Chi-Square Distribution; D003238:Connective Tissue / Q000473:pathology; D004846:Epithelial Attachment / Q000473:pathology; D004848:Epithelium / Q000473:pathology; D005260:Female; D005884:Gingival Hemorrhage / Q000145:classification*; D005890:Gingivectomy; D005891:Gingivitis / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity