| Summary: | 碩士 === 高雄醫學大學 === 口腔衛生學系碩士在職專班 === 105 === One of the reasons causing acid corrosion of tooth is acidic beverages. The tooth corroded immediately when drinking acidic beverages and it is irreversible even brush tooth in time. There are many studied about tooth erosion, but there are few pieces researches provided the suggestion to reduce tooth damage.
The purpose of this in-vitro study is to investigate if washing tooth by an available solution which simulated gargle behavior and then brushing tooth after tooth corroded can reduce the wear of tooth more effective than brushing tooth right away or not. The results could be a suggestion to avoid tooth erosion after drinking acidic beverages in the future.
We collected the tooth samples which were no tooth decay or breakage, then separate into 4 groups and 10 samples for each group. The control group was brushing the tooth immediately after utilizing acidic beverages. The experiment groups were washing the tooth by different solution after utilizing acidic beverages, running water, green tea and mouthwash, respectively. We used Vickers hardness test and atomic force microscope to measure hardness (Hv), depth of indentation (nm) and surface roughness (nm) of all the untreated tooth. Soaked in coke which simulated acidic beverages 3 minutes, then put into different solution and shook 1 minute, but no washing tooth group are dried out directly by nitrogen.
According to the results, the changes of the tooth were tested by different mouthwash method. After using utilizing acidic beverages and brushing tooth, the depth of nick was significant to become shallower (p<0.001). In which fluoride mouthwash group can effectively reduce the loss of dentin by etching solution erosion (p<0.001), and there was also a significant difference (p<0.001) in the surface roughness change after acid erosion. In which, the fluoride mouthwash group showed the smallest roughness increase, and exist a statistically significant difference between non-mouthwash, running water and the green tea group (p<0.001, p <0.001, p=0.004). The difference of hardness was significantly decreased after using utilizing acidic beverages and brushing tooth (p=0.002). In which, the green tea group showed the maximum hardness change, and the results showed that there was a significant difference between the non-mouthwash and the green tea group (p=0.005).
According to the previous studies, the dietary acid intake is the most important risk factor in tooth wear. However, using the mouth-rinse and then brushing teeth after acid drinking intake that can reduce the tooth wear by brushing teeth and acid subsequent drinking. The purpose is to keep and extend the tooth healthy.
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