The effects of blocking the oxygen in the air during the polymerization of sealant

Oh, You-Hyang; Lee, Nan-Young; Lee, Sang-Ho

Journal of the Korean Academy of Pediatric Dentistry 2006;33(3):365-376.
Published online August 31, 2006.

The effects of blocking the oxygen in the air during the polymerization of sealant

You-Hyang Oh, Nan-Young Lee, Sang-Ho Lee

광중합 시 공기 중 산소의 차단이 치면열구전색제의 중합에 미치는 영향

오유향, 이난영, 이상호

조선대학교 치과대학 소아치과학교실

Correspondence: Sang-Ho Lee,

Abstract

The purpose of this study was to evaluate the efficacy of blocking the oxygen in the air during the polymerization of sealant. All curing were performed with various light curing units under the application of oxygen gel barrier, stream of nitrogen and carbon dioxide gas for inhibition of oxygen diffusion into sealant surface. The results of present study can be summarized as follows : 1. The amount of eluted TEGDMA form the specimens cured with all the three different light units in the stream of N₂ and CO₂ gas and application of Oxygen gel barrier(DeOx^®) were significantly lower than in the room-air atmosphere (Control) (p<0.05). 2. In the DeOx^® application, the amount of eluted TEGDMA the specimen cured with PAC light for 10seconds was less than that cured in the stream of N₂ and CO₂ atmospheric conditions (p<0.05) 3. In the LED using 10 or 20sec irradiation times under the stream of N₂ and CO₂, the eluted TEGDMA showed to be no statistically significant difference (p>0.05). 4. The microhardness from the specimens cured with all the three different light units under each treated conditions were significantly higher than in the room-air atmosphere (p<0.05). 5. The surface treatment by DeOx^®, N₂ and CO₂ reduces the thickness of oxygen inhibited layer by sp proximately 49% of the untreated control value.

Key Words: Oxygen inhibited layer, Light sources, TEGDMA(triethyleneglycol dimethacrylate)