The applicability of DPSS laser for light curing of composite resins.
The applicability of diode-pumped solid state (DPSS) laser for light curing the composite resins was tested with a quartz-tungsten-halogen lamp-based unit and a light emitting diode unit. The emission spectra of the light-curing systems used match with the absorption spectrum of camphorquinone. Among the light-curing systems, DPSS laser showed the narrowest emission bandwidth. The light intensity of DPSS laser was approximately 64% of the other two light-curing units. In most specimens, DPSS laser showed the least attenuation of the number of incident photons. On the top surface, specimens cured with DPSS laser showed similar microhardness values compared to the specimens cured with the other two light-curing units. During the light curing, DPSS laser induced the lowest temperature rise (25.5-35.5 degrees C) in the specimens compared to the other two light-curing units (34.2-41.7 degrees C). In conclusion, DPSS laser has high potential to be an alternative to the other light-curing units or a new light-curing unit.
Kwon
Yong Hoon
YH
Department of Dental Materials, Medical Research Institute and College of Dentistry, Pusan National University, Busan 602-739, Korea. y0k0916@pusan.ac.kr
Jang
Chang-Min
CM
Shin
Dong-Hee
DH
Seol
Hyo-Joung
HJ
Kim
Hyung-Il
HI
D003188:Composite Resins / Q000737:chemistry / Q000528:radiation effects*; D003793:Dental Restoration, Permanent / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D053844:Lasers, Solid-State; D008027:Light; D011108:Polymers / Q000737:chemistry / Q000528:radiation effects*; D013729:Terpenes
D003188:Composite Resins; D011108:Polymers; D013729:Terpenes; C048339:camphoroquinone