A Study on Crown and Bridge Resin using PNC-EMA Monomer

• Published in: Journal of Nihon University School of Dentistry Vol. 28; no. 4; pp. 240 - 248
• Main Authors: ANZAI, Misaki, HOYA, Ken, TORIYAMA, Fumito, IDE, Kohzo, KIKUCHI, Hisaji, HIROSE, Hideharu, YUDA, Masashi, OHASHI, Masayoshi
• Format: Journal Article
• Language: English
• Published: Japan Nihon University School of Dentistry 1986
• Subjects: Chemical Phenomena; Chemistry, Physical; Composite Resins; crown and bridge resin; Crowns; Dentistry; Denture, Partial; Methacrylates; Methylmethacrylates; PNC-EMA monomer; Polyethylene Glycols; Polymethacrylic Acids; Stress, Mechanical; Surface Properties
• ISSN: 0029-0432; 1884-2984
• DOI: 10.2334/josnusd1959.28.240

The present study investigated the development of crown and bridge resin using a new PNC-EMA monomer. MMA monomer has long been used for crown and bridge resins, but the polymer prepared with MMA monomer has certain demerits such as low mechanical strength and abrasion resistance. The authors prepared a polymer by mixing 3PNC-EMA monomer having a P=N bond in its skeleton, previously synthesized by ANZAI et al., with a monomer currently available on the market, in proportions of 14-70% (wt), using PMMA as the polymer. Both the compressive strength and hardness increased in accordance with increased amounts of the mixed 3PNC-EMA monomer, but water sorption reached 1.86 mg/cm2 when the mixed amount of 3PNC-EMA was 28%. The degree of abrasion decreased in accordance with the increase in the mixed amount of 3PNC-EMA, showing a value 1/3 that of PM MA, when mixed in a proportion of 70%.