Martin P, D'Aoust P, Landry R G, Valois M
Royal Victoria Hospital, Montreal.
J Can Dent Assoc. 1994 Oct;60(10):895-8.
The aim of this study was to evaluate if the presence of supragingival plaque can influence measurements of gingival crevicular fluid flow (CFF) taken with the Periotron 6000 unit. Sixty-seven experimental sites and 67 contralateral control sites were randomly chosen. Crevicular fluid was collected on a filter paper strip for 15 seconds and the CFF was measured using the Periotron 6000 unit: CFF1. The supragingival plaque was removed from the experimental site with a Gracey curette and the plaque index (PI) was estimated. Five minutes later, a second CFF measurement was taken: CFF2. On the control tooth, the plaque was not removed, and the PI was established after the second CFF measurement. There was no significant difference between the CFF1 and the CFF2 values for the control teeth. In the experimental teeth, a PI of 3.0 increased the CFF1 (pre-plaque removal) compared to the CFF2 (post-plaque removal) value by 20.6 Periotron units (PU) (p = 0.0004). A PI of 2.0 caused a 7.3 PU increase (p = 0.0370). There were no significant changes for a PI of 1.0 or 0. In this type of experimental protocol, the results also indicated that CFF differences were not affected by the gingival index (GI) for either the experimental or control groups. These results indicate that large amounts of supragingival plaque can significantly elevate CFF measurements, as determined by the Periotron 6000 unit.
本研究的目的是评估龈上菌斑的存在是否会影响使用Periotron 6000装置测量的龈沟液流量（CFF）。随机选择了67个实验部位和67个对侧对照部位。用滤纸条收集龈沟液15秒，并使用Periotron 6000装置测量CFF：CFF1。用Gracey刮匙从实验部位去除龈上菌斑，并评估菌斑指数（PI）。五分钟后，进行第二次CFF测量：CFF2。在对照牙上，不去除菌斑，并在第二次CFF测量后确定PI。对照牙的CFF1和CFF2值之间没有显著差异。在实验牙中，PI为3.0时，与CFF2（去除菌斑后）值相比，CFF1（去除菌斑前）增加了20.6个Periotron单位（PU）（p = 0.0004）。PI为2.0时导致增加7.3个PU（p = 0.0370）。PI为1.0或0时没有显著变化。在这种实验方案中，结果还表明，无论是实验组还是对照组，CFF差异均不受牙龈指数（GI）的影响。这些结果表明，大量龈上菌斑可显著提高Periotron 6000装置测定的CFF测量值。
