Compare The Influence Of Two Explorers On The Enamel Of Artificial Initial Caries And The Difference Of Them In Caries Sampling Survey

ObjectiveTo compare the influence of two explorers on the enamel of artificial initial caries and the demineralization condition of two experimental areas. To compare the difference between two explorers in caries sampling survey.Methods1. Built an artificial initial caries model in vitro. Compare the influence of two explorers on the enamel of artificial initial caries through qualitative and quantitative experiments. In the qualitative experiment, we had used two explorers aided by INSTRON-1342 machine to probe the experimental areas of artificial initial caries enamel separately with 350 gram by 0.09mm speed per second before observed the probed holes under scanning electron microscope. In the quantitative experiment, experimental areas of artificial initial caries were probed in the same way as described above. Then we statistically analyzed the probing depths and volumes in enamel caused by two explorers.2. Observed the remineralization condition of probed holes under scanning electron microscope.3. Made a caries sampling survey on the oral health condition among the same 12-year-old children in Fujian Province with two explorers separately. Then we got the results and did the statistical analysis.Results1. The holes probed by sharp explorer are deep and narrow. The holes probed by CPI explorer are shallow and wide. 2. The average depth probed by the sharp explorer is deeper than by CPI explorer(t=-7.4684,P<0.0000). The average strain energy caused by CPI explorer is larger than by sharp explorer(Z=-2.021,P=0.043).3. The remineralization condition of probed experimental areas by two explorers has similar result observed under scanning electron microscope. The remineralization condition of two holes are not so well as the remineralization condition of areas which were not probed.4. The sampling survey shows: The caries detection rate of sharp explorer was 56.06 percent and of CPI explorer was 32.83 percent .The detection rate of sharp explorer are higher than that of CPI explorer by 23.23 percent.ConclusionThe influence on enamel of artificial initial caries caused by using sharp explorer is not more than that caused by using CPI explorer, and the caries detection rate of sharp explorer are higher than CPI explorer. So we suggest we can still use the sharp explorer in clinical examination and sampling survey. But we should be gentle whether we use CPI explorer or the sharp explorer.