Meissner Grit, Oehme Bernd, Strackeljan Jens, Kocher Thomas
Department of Restorative Dentistry, Periodontology and Pediatric Dentistry, School of Dentistry, Unit of Periodontology, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany.
J Clin Periodontol. 2008 Feb;35(2):126-32. doi: 10.1111/j.1600-051X.2007.01177.x.
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.
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 inserts' position on the tooth in vitro and comparing the detection results with visual findings.
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 "spots" 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.
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.
我们最近在体外测试了一种基于传统牙科超声洁牙机的表面检测系统。本研究的目的是在体内研究该检测装置的敏感性和特异性。
对63颗任意选取的牙周受损牙齿的龈下颊面进行口内扫描，同时将探头的龈上位置以及检测系统的相应信号保存为单独的文件。拔牙后，通过在体外将探头重新定位在牙齿上并将检测结果与视觉检查结果进行比较，来评估表面检测结果。
在扫描的牙齿表面上，有44个牙石斑点，占所有扫描表面的22.3%（患病率）。无牙石表面在数学上被划分为“斑点”。该装置正确分类了40个牙石和125个牙骨质斑点，而4个牙石和28个牙骨质斑点被错误分类。区分牙石和牙骨质的敏感性为91%，特异性为82%。阳性和阴性预测值分别为0.59和0.97。
该表面检测装置能够在体内临床上区分牙骨质和牙石。因此，这种方法可能有助于决定继续进行龈下刮治是否会损伤牙骨质。
