422 - Effect of Light Cure on Silver Diamine Fluoride Treatment on Dentinal Hardness in Young Permanent Teeth​

Purpose: Silver diamine fluoride (SDF) can halt the progression of the carious lesion and has been used as an interim treatment for uncooperative, young, challenging, and special health care needs patients. Few studies have investigated the effects of light curing on SDF penetration depth. The purpose of this study is to compare dentine microhardness of SDF treatment with and without light curing (LC) on non-carious teeth.

Methods: Ten extracted human permanent teeth will be sectioned into two halves. Specimens were distributed into two groups (n=10 sectioned teeth). (1) SDF: Dentin treated with 38% SDF. (2) SDF/LC: Dentin treated with SDF with LC for 20 seconds. The micro-hardness test, each specimen obtained Vickers Hardness Number (VHN) in three phases. (1) Sound dentin: After exposing the dentin surface. (2) Demineralized dentin: After immersing the specimens into the demineralized solution for three days. (3) Treated dentin: After one week of application of dentin treatment agent to demineralized dentin surface.

Results: Treatment by SDF and SDF+ LC show significant higher surface microhardness than demineralized dentin. There is no significant effect of light curing treatment effect on surface microhardness than no light curing.

Conclusion: Light curing after SDF application has no effect on surface microhardness of young permanent tooth.