Nano Biomedicine
Mechanical Properties and Ions Release of S-PRG Filler-containing Pit and Fissure Sealant

Masayuki KAGA1, Junko MASUTA1, Megumi HOSHINO1, Michi GENCHOU1, Hajime MINAMIKAWA1, Masanori HASHIMOTO1, and Yasutaka YAWAKA1

1Department of Dentistry for Children and Disable Persons,
Division of Oral Functional Science, Graduate School of Dental Medicine,
Hokkaido University, Sapporo, Japan
2Division of Biomaterials and Bioengineering, School of Dentistry,
Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan

Nano Biomedicine 2011;3(1): 191-199, (Jun 30)

The purpose of this study was to clarify the properties of functional filler-containing pit and fissure sealants (FS). Seventy-two specimens were prepared and divided into three groups of three resin sealants ( S-PRG filler-containing FS, DELTON and Teethmate F1-2.0) and one glass-ionomer sealant (Fuji III LC). Each of six discs (6 mm in diameter~3 mm in thickness) was used for 24-h, 4-week and 12-week experiments. Diametral tensile strength (DTS) and ion release were measured. S-PRG FS and Delton showed high values of DTS (23.2 MPa and 23.5 MPa, respectively) after 24 hours of storage. The DTS values of each sealant remained relatively constant. A large amount of fluoride was initially released from the sealants. However, fluoride release did not influence on DTS. S-PRG filler-containing FS released large amounts of strontium, boron and fluoride ions. Filler-containing sealants release large amounts of ions, contributing to antibacterial effects.

Key words: S-PRG fillers, pit and fissure sealants, diametral tensile strength, ion release <

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