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

1.在PH值测定仪的研制上，没有完成弱无线安装的表现。采用该无线电模块和pH传感器的设备，存在尺寸(24 mm×24.5 mm)过大，安装在口腔中的缺点，降低了电源功率，增加了噪声。在小型锂离子电池中，覆盖传感器模块和传输模块的功耗是有限度的。这一点的改善似乎是未来的必然。通过唾液流率的变化，同时监测口腔3个部位的pH值，并观察唾液对pH值变化的影响。检测唾液流速、pH、唾液缓冲容量的个人变化，菌斑沉积后，监测糖液降低pH后恢复的情况，用酸性饮料漱口后，pH降至3.3，并逐渐恢复。在Lali区，PHS恢复到初始pH的平均时间为92.2±89.1秒，而UPB和UAB区的PHS恢复到初始pH的速度很慢，在漂洗后30min，UPB和UAB的平均PHS分别为5.1±0.3和4.7±0.3。两者都与拉利站点的PH值有显著差异(p&lt；0.001)。结果表明，在口腔内一处安装pH传感器监测咀嚼口香糖时唾液的pH值，在2分钟内达到最大值(8.2)，5分钟后降至7以下，然后逐渐下降。

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.