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Radiopacity and Physical Properties of Titanium-polymethacrylate Composite

Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, 7-1, Sakamoto-machi, Nagasaki-city, 852, Japan

M. Sueyoshi

Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, 7-1, Sakamoto-machi, Nagasaki-city, 852, Japan

M. Atsuta

Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, 7-1, Sakamoto-machi, Nagasaki-city, 852, Japan

Titanium-polymethacrylate composite was prepared as an x-ray-opaque filler for composite core materials. The base monomers of the composite were 2,2-bis [4-(3-methacryloyloxy-2-hydroxy propoxy) phenyl]propane (Bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA). Pure titanium powder was used as a radiopaque element. Two functional methacrylates-isopropyl dimethacryloyl isostearoyl titanate (KR-7) and 4-methacryloyloxyethyl trimellitate anhydride (4-META)—were adopted as couplers of titanium powder. The radiopacity of composites was determined in terms of their equivalent thickness of aluminum per unit thickness of material. Compressive and transverse strengths of the composites were measured by use of coupled and untreated titanium fillers. The composites that contained 70% and 80% titanium by weight showed more radiopacity than enamel and less than amalgam. Radiopacity was controlled by the content of titanium filler in the composite. The decrease in compressive and transverse strengths of the composites was 0.7 to 15.9% and 43.7 to 52.9%, respectively, after one year's immersion in water. The decrease in transverse strength was remarkable; however, this deterioration was diminished by use of both KR-7 and 4-META as couplers for titanium. Thus, prepared titanium-polymethacrylate composite may be used as a radiopaque composite filler for self-curing composite core materials.

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Journal of Dental Research, Vol. 71, No. 1, 2-6 (1992)
DOI: 10.1177/00220345920710010201


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Matsumura, H. Articles by Atsuta, M. Search for Related Content PubMed PubMed Citation Articles by Matsumura, H. Articles by Atsuta, M. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB TITANIUM TRIETHYLENE GLYCOL DIMETHACRYLATE Social Bookmarking                         What's this?