C-reactive protein associated with periodontitis in a Thai population
: Blackwell Synergy
Aim: We have recently tested a surface detection system based on a conventional
dental ultrasonic scaler in vitro. The aim of the present study was to investigate
sensitivity and the specificity of the detection device in vivo.
Material and Methods: Subgingival buccal surfaces of 63 arbitrarily selected
periodontally compromised teeth were scanned intra-orally, while the supragingival
positions of the insert, along with the corresponding signals of the detection system,
were saved as separate files. After extraction, the surface detection results were
evaluated by re-positioning the insertsÃ¢â‚¬â„¢ position on the tooth in vitro and comparing the
detection results with visual findings.
Results: On the scanned tooth surfaces, there were 44 calculus spots, which covered
22.3% of all scanned surfaces (prevalence). The calculus-free surface was divided into
Ã¢â‚¬ËœÃ¢â‚¬ËœspotsÃ¢â‚¬â„¢Ã¢â‚¬â„¢ mathematically. The device correctly classified 40 calculus and 125
cementum spots, whereas four calculus and 28 cementum spots were classified
incorrectly. Calculus and cementum were discriminated with a sensitivity of 91% and
a specificity of 82%. The positive and negative predictive values were 0.59 and 0.97.
Conclusion: The surface detection device was able to clinically differentiate
cementum and calculus in vivo. Therefore, this method may support the decision of
whether continued subgingival scaling could damage the cementum.
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