The establishment of site-specific oral environment by the pH monitoring

1.在pH计的开发中，没有完成弱无线安装的性能。缺点是尺寸（24mm × 24.5mm）太大，不适合放入口中，并且在内置该无线电模块和pH传感器的设备上，当电力降低时，噪声增加。为了在小型锂离子电池中覆盖传感器模块和传输模块的消耗电力，存在限制。这一点的改进似乎是未来的必要性。通过唾液流速的变化，同时监测口腔中3个位置的pH，并检查唾液对pH变化的影响。检查唾液的流速、pH、缓冲能力的个人变化，并在牙斑沉积后，监测糖溶液降低pH后的恢复情况。用酸性饮料漱口后，pH值降至3.3，然后逐渐恢复。在LALi区域，恢复到原始pH的平均时间为92.2 ± 89.1秒，但在UPB和UAB区域的pH恢复到原始pH非常缓慢，并且在冲洗后30分钟，UPB和UAB的平均pH分别为5.1 ± 0.3和4.7 ± 0.3。两者均与LALi位点的pH值有显著差异（p<0.001）。结果表明，通过在口腔中的一个地方安装pH传感器来监测咀嚼口香糖时唾液pH的结果显示，在咀嚼口香糖期间，pH在2分钟内达到最大值（8.2），在5分钟内福尔斯下降到pH 7或更低，然后逐渐福尔斯下降。

1. On the development of the pH meter, there was no performance on completing the weak wireless installation. It was disadvantageous that the size (24mmx24.5mm) was to big for set in the mouth and the noise increased when the electric power was decresed on the equipment which built in this radio module and pH sensor. There was a limit in order to cover the consumed electric power of sensor module and transmission module in a small lithium ion battery. The improvement of this point seemed to be the necessity in future.2. The pH of 3 positions in the oral cavity is monitored simultaneously, by the change of the salivary flow rate, and also examined the effect of saliva on the change of pH. Flow velocity, pH, personal change of buffer capacity of the saliva are examined and after the plaque deposits, the aspect of the recovery after pH decrease by sugar solution is monitored, After rinsing the mouth with the acid beverage, the pH dropped to 3.3, and it gradually recovered. At the LALi region, the mean time of recovery to the original pH was 92.2 ± 89.1 seconds but the pHs at the UPB and UAB regions recovered to the original pH very slowly and at 30 minutes after rinsing, the mean pHs of UPB and UAB were 5.1 ± 0.3 and 4.7 ± 0.3, respectively. Both were significantly different (p<0.001) from the pH at the LALi sites.3. It was shown that in the result of monitoring saliva pH under gum chewing by installing pH sensor in one place in the oral cavity, durring gum chewing the pH became to largest (8.2) in two minutes and it falls to pH7 or less in 5 minutes and gradually falls.