Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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A Study on new Photoinitiator of Visible Light Dental Composite Resin

치과용 가시광선 중합형 복합수지의 새로운 광개시제에 관한 연구

  • Choi, Yong-Seok (Dept. of Dental Laboratory Technology, Mokpo Science College) ;
  • Sun, Gum-Ju (Dept. of Polymer Engineering, College of Engineering, Junnam University)
  • 최용석 (목포과학대학 치기공과) ;
  • 선금주 (전남대학교 공과대학 고분자 공학과)
  • Published : 2002.01.30
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Abstract

The photopolymerization efficiency and surface hardness of composite resin containing 1,2-phenylpropanedione (PD) and diacetyl (DA) as photoinitiators were studied by IR and Vickers hardness and the results were compared with that of camphorquinone (CQ). Relative photopolymerization efficiency of the photoinitiators increased in the order of DA < CQ < PD. Vickers hardness of composite resin containing the photoinitiators increased in the order of CQ < PD < DA. Thus, PD is a new visible light photoinitiator for dental composite resin with higher photopolymerization efficiency and surface hardness than that of CQ. Mechanical properties such as Vickers hardness, diametral tensile strength, and flexural strength of the experimental resin composite prepared by addition of the photosensitizer into a resin of bis-GMA improved with increasing the photosensitizer content and irradiation time. The resin composite of bis-GMA containing DA or PD shows better mechanical properties than that of CQ.

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