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Microhardness and Cutting Resistance in Enamel of Primary Molars Among Various Caries Experience Groups In Vitro |
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| รหัสดีโอไอ | |
| Creator | Varisara Sirimaharaj |
| Title | Microhardness and Cutting Resistance in Enamel of Primary Molars Among Various Caries Experience Groups In Vitro |
| Contributor | Nawaporn Khositphanthawong, Sitthichai Wanachantararak |
| Publisher | Faculty of Dentistry, Chiang Mai University |
| Publication Year | 2565 |
| Journal Title | Chiang Mai Dental Journal |
| Journal Vol. | 43 |
| Journal No. | 1 |
| Page no. | 49-56 |
| Keyword | caries experience, cutting resistance, enamel, hardness, primary tooth |
| URL Website | http://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/index |
| Website title | Chiang Mai Dental Journal |
| ISSN | 2773-921X |
| Abstract | Objectives: To investigate cutting resistance, microhardness, and their correlations with primary teeth enamel, from different caries experience groups.Methods: Forty-five extracted primary molars were divided equally into three groups using the dmft/dmft+DMFT index: low, moderate, and high caries experience groups. Each tooth was divided into 2 parts to test cutting resistance and microhardness. All data were compared statistically between groups with different caries experiences using the one-way ANOVA. The correlations were investigated using the Spearman’s and the Pearson’s correlation.Results: The high caries experience group had significantly lower microhardness of enamel (295.8±12.73 Vickers Hardness Number (VHN)) than the moderate and low caries experience groups (315.01±16.13 VHN; p=0.001 and 325.96±9.91 VHN; p<0.001, respectively). The cutting resistance of enamel from the high caries experience group (87.23±15.06 grams) was also significantly less than those from the moderate and low caries experience groups (112.78±16.02 grams; p=0.002, and 111.67±24.75 grams; p=0.003, consecutively). There were negative correlations between caries experience and cutting resistance (r=-0.46; p=0.002) and between caries experience and microhardness (r=-0.71; p<0.001) but a positive correlation between cutting resistance and microhardness (r=0.39; p=0.009).Conclusions: Enamel of primary teeth from the high caries experience group had less microhardness and cutting resistance than those of the moderate and low caries experience groups. |
