우유, 모유, 두유의 치아 법랑질 탈회력에 대한 생체외 비교 연구 = IN VITRO COMPARISON OF THE TOOTH ENAMEL DEMINERALIZING POTENTIAL OF BOVINE MILK, HUMAN MILK, AND SOY MILK

다국어 초록 (Multilingual Abstract)

The purpose of this study was to compare the tooth enamel demineralizing potential of bovine milk, human milk, and soy milk in vitro.
Sucrose and saliva were added to each kind of milk separately or together.
Therefore, there were twelve experimental solutions in total.
Tooth enamel specimens which were cut from extrated permanent teeth were embedded in the resin blocks and polished.
The surface microhardness of specimens was measured by the microhardness tester, and the specimens which have the surface microhardness from 300 VHN to 370 VHN selected for the study.
Streptococcus sobrinus and the bacteria which were sampled from the caries dentin were inoculated to the experimental solutions and the solutions were incubated at 37。C for 24 hours.
After the incubation the surface hardness was measured again, and the difference between before and after incubation was regarded as demineralizing potential.
The obtained results were as follows:
1. The demineralizing potential of the soy milk was greater than that of the bovine milk or of the human milk (p<0.01).
2. The demineralizing potential of the human milk was slightly greater than that of the bovine milk but the difference was not significant.
3. Sucrose increased the demineralizing potential of the bovine milk and the human milk but decreased that of the soy milk.
4. Among the all experimental solutions, the soy milk with no sucrose or saliva showed the highest demineralizing potential, and the soy milk with surose and saliva showed the highest acid production.
5. Among the all experimental solutions, the bovine milk with no sucrose or saliva showed the lowest demineralizing potential and acid production.