A comparative study of the susceptibility of cut and uncut enamel to erosive demineralization

作者：Wa Than Lin; Kitasako Yuichi^*; Nakashima Syozi; Tagami Junji

来源：Dental Materials Journal, 2017, 36(1): 48-53.

DOI：10.4012/dmj.2016-239

• Enamel
• Erosion
• Surface hardness
• Surface loss
• FIB-TEM

This study aimed to evaluate the susceptibility of cut and uncut enamel surfaces to an erosive challenge and to examine the resultant characteristics/morphological changes. Ten extracted human incisors were used for preparation of enamel samples, and samples were immersed in citric acid. After 3 (total 3 min) and 6 cycles (total 6 min) of erosive challenges, surface loss (SL) and morphological changes were measured using scanning microscopy and FIB-TEM. Ca release (CA) and surface hardness (SH) were measured using a calcium-sensitive electrode and hardness tester respectively. Mean values of all measurements were statistically analyzed by using a t-test. Uncut enamel samples had significantly lower SL and greater SH than cut enamel (p<0.01). Cut enamel samples after 3 cycles showed higher CA compared with those from uncut enamel samples (p<0.05). Cut enamel was shown to be more susceptible to acidic dissolution and deeper acid penetration than uncut enamel after erosive demineralization.

• 出版日期2017-2