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J Korean Acad Pediatr Dent. 2005;32(3): 427-436.
CHANGES IN ADHESION OF STREPTOCOCCUS MUTANS TO NANOCOMPOSITE RESINS AFTER ACIDULATED PHOSPHATE FLUORIDE GEL APPLICATION
Young-Jung Jung, Young-Jae Kim, Jung-Wook Kim, Ki-Taeg ang
Department of Pediatric Dentistry, College of Dentistry and Dental research Institute, Seoul National University Topical
Corresponding Author: Ki-Taeg ang ,Tel: 02-2072-2682, Email: jangkt@snu.ac.kr
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ABSTRACT
Topical application of APF gel can increase the surface roughness of resin composites and the roughened surfaces may allow increased bacterial accumulation and surface staining. Resin specimens of two proprietary resin composites, Filtek Z250(FZ) and Filtek Supreme Universal(FS), and experimental resin composites containing 0%, 3%, 6% nanofillers(E0, E3, E6) were fabricated and divided into two groups of the same number; APF treatment group and no treatment group. The amount of S. mutans adhered to specimens and the mean surface roughness(Ra) were measured. The results were as follows; 1. In no treatment group, the amount of S. mutans adhered to FS was the smallest. It was significantly different from those of FZ, E3, E6(p<0.05) although it was not significantly different from that of E0(p>0.05). 2. For all resin composites used, the amount of S. mutans adhesion in APF treatment group was significantly greater than that in no treatment group(p<0.05). 3. In APF treatment group, the amount of S. mutans adhesion was significantly different between materials(p<0.05), and increased in order of FS, FZ, E0, E3 and E6. 4. Difference of the surface roughness(Ra) between materials was not statistically significant in both no treatment group and APF treatment group(p>0.05)
Keywords: Nanofiller | APF gel | Streptococcus mutans adhesion | Surface roughness
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