ผลของระยะเวลาที่ใช้ในการทาซิลเวอร์ไดเอมีนฟลูออไรด์ต่อความแข็งแรงยึดเฉือนของเนื้อฟันที่มีการสลายแร่ธาตุกับวัสดุกลาสไอโอโนเมอร์ ซีเมนต์: การศึกษานอกร่างกาย

Abstract

Objective: The aim of this in vitro study was to assesses the effect of application times of SDF on the bond between glass ionomer cement and the dentin of primary teeth. Methods: Forty-eight dentin specimens were prepared from the extracted primary teeth. Artificial dentin carious lesions were created by a pH-cycling procedure. All of specimens were divided into four groups (n=12/group); Group 1 apply with deionized water, Group 2, 3 and 4 apply SDF 10, 30 and 60 seconds, respectively. After that, glass ionomer cement (Fuji IX GP extra) was bonded onto specimens and stored in deionized water. After 48 hours, the specimens (N=11/group) were prepared for shear bond strength testing and the failure mode was assessed with a 3D-profilometer. One specimen from each group were prepared for mineral density and penetration depth assessment using micro-CT µ35 and scanning electron microscope (SEM QUANTA). Results: In relation to the shear bond strength effect, no statistically significant differences were observed among the groups (p=0.66). The shear bond strength (mean±SD) after treatment with deionized water, 10 seconds SDF, 30 seconds SDF and 60 seconds SDF were 2.39 ± 1.36 MPa, 2.51 ± 1.00 MPa, 2.95 ± 0.99 MPa and 2.47 ± 1.12 MPa, respectively. Most common failure mode was the mixed failure mode in all groups. The dentin mineral density was increased in the SDF groups. The penetration depth of silver ion into dentinal tubule was upto 1,000 µm. in all SDF groups. Conclusion: The bond strength between glass ionomer cement and demineralized primary dentin and the penetration depth of silver ion into dentinal tubule have been neither affected by the application of silver diamine fluoride nor the various of application times.