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The Application of Fluorinated Aromatic Dimethacrylates to Experimental Light-cured Radiopaque Composite Resin, Containing Barium-Borosilicate Glass Filler

1993; Japanese Society for Dental Materials and Devices; Volume: 12; Issue: 1 Linguagem: Inglês

10.4012/dmj.12.1

1881-1361

Jirō Tanaka, Kohichi Inoue, Hiroyuki MASAMURA, Kazuyoshi Matsumura, Hiroyuki Nakai, Kiyoshi Inoue,

Radiation Shielding Materials Analysis

This study investigated the durability, especially the nonwaterdegradable qualities, of experimental lightcured composite resin containing barium-borosilicate glass filler. For this purpose, Bis-GMA, a typical component of base monomer in conventional composite resin, was replaced by Bis-GMA-F which is water-repellent. After over 20, 000 thermal cycles, the composite resin containing Bis-GMA retained only 60∼70% of its initial compressive, diametral tensile, flexural strength and flexural elastic modulus. However, the experimental composite resin containing Bis-GMA-F as a resin matrix showed no loss of compressive, diametral tensile strength or flexural elastic modulus, although flexural strength showed some deterioration. It was considered that the difference between Bis-GMA-F and Bis-GMA, as resin matrix, caused variation in the characteristics of water sorption.