교합면 소와 및 열구에서 산부식 제재의 효과적인 침투 방법에 대한 고찰

Abstract

The prevention of dental caries in the child is one of the fields of the greatest interest to dental clinicians. Permanent molars in a short time after their eruption or primary molars have complicated pit and fissure forms on their occlusal surface and show the low level of calcification, leading to high susceptibility to dental caries. Therefore, the preventive measures of dental caries in these regions have been studied vigorously. Pit and fissure sealing together with fluoride application has been supported as the most reliable method to prevent the pit and fissure dental caries in the child. It is very important that resin sealants should penetrate into tooth surface effectively as well as be retained for a longed time to maximize the prevent effect of pit and fissure sealing. To induce these results, the effective penetration of acid etching agents is considered to be of great importance. The purpose of this study was to investigate the effective penetration methods of acid etching agents in the pit and fissures on the occlusal surface. Extracted maxillary 1st and 2nd premolars were divided into 4 groups : to group 1 only acid etching agent was applied, to group 2 ultrasonic scaler as well as acid etching agent were applied, to group 3 after fissurotomy acid etching agent was applied, and to group 4 after fissurotomy the same process performed with group 2. The comparison between the 4 groups by the use of scanning electron microscope showed the results as follows : 1. Comparing each groups with regard to the penetration rate(%) of acid etching agents, group 3 and group 4 showed improved penetration rate(%) compared with group 1. Group 2 made no significant different results from group 1, but had somewhat better penetration rate(%). There was no significant difference between group 2, group 3, and group 4. 2. Comparing each groups with regard to the penetration rate(%) of acid etching agents according to regions within fissures, group 3 and group 4 showed more improved penetration rate than group 1 in the mesial pit and distal pit. However, no significant difference between each groups was showed in the middle fissure.