Effect of fluoride pretreatment on primary and permanent tooth surfaces by acid-etching.
This study observed the effect of fluoride application on a 37% phosphoric acid etching for 20 s of the enamel surfaces of primary and permanent teeth based on a clinical protocol employed in dental hospitals, through atomic force microscopy and scanning electron microscopy. Enamel samples were prepared from 84 exfoliated and noncarious teeth. Primary (groups 1-4) and permanent (groups 5-8) tooth samples were assigned randomly to one of eight groups based on the timing of acid-etching with 37% phosphoric acid after an acidulated phosphate fluoride (APF) treatment. Groups 1 and 5 received no fluoride application. Groups 2-4 and 6-8 were pretreated with fluoride and received acid-etching 2 weeks later (groups 2 and 6), 1 week later (groups 3 and 7), and immediately (groups 4 and 8). The acid-etching process led to a significant increase in roughness (p<0.0001), and the APF treatment led to a decrease in primary and permanent tooth surface roughness (p<0.005). An acid-etching procedure 2 weeks after performing an APF pretreatment might be recommended to obtain the maximum enamel adhesion of a resin composite.
Department of Biomedical Engineering & Healthcare Industry Research Institute, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
Samjin
S
Choi
Youjin
Y
Cheong
Gi-Ja
GJ
Lee
Hun-Kuk
HK
Park
D000134:Acid Etching, Dental / Q000379:methods* / Q000592:standards; D000149:Acidulated Phosphate Fluoride / Q000737:chemistry*; D006801:Humans; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D011897:Random Allocation; D014070:Tooth / Q000737:chemistry* / Q000187:drug effects* / Q000648:ultrastructure
D000149:Acidulated Phosphate Fluoride