Abstract
This study was conducted to observe surface morphology changes of dentin surface coated with potassium doped nano hydroxyapatite (K-nHA) on the surface of isolated teeth. The surface morphology of isolated molars was coated with K-nHA, nano-hydroxyapatite (nHA), and Gluma desensitizers to observe changes in surface morphology. The effects ofK-nHA, nHA, and Gluma desensitizers on microleakage of pure titanium crowns after bonding with zinc polycarboxylate cement (ZPCC) were measured. Three different treatment methods can effectively close the dentin tubules. Depth into the dentin tubule of K-nHA was higher than the other two groups. K-nHA reduces the microleakage of ZPCC bonded pure titanium crown. The microleakage value of the K-nHA group was lower than that of the nHA group, but there was no statistical difference. K-nHA is better than the simple nHA in closing the dentinal tubules. It has better curative effect on dentin hypersensitivity, and has a better sealing effect.
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