Rueggeberg F A, Dlugokinski M, Ergle J W
Department of Oral Rehabilitation, Medical College of Georgia, School of Dentistry, Augusta 30912-1260, USA.
J Am Dent Assoc. 1999 Dec;130(12):1751-7. doi: 10.14219/jada.archive.1999.0132.
The authors conducted research to examine the effectiveness of six surface treatments in reducing the oxygen-inhibited layer of a commercially available, freshly polymerized, light-cured unfilled dental sealant.
Surface treatments of a light-cured sealant (Delton Light Curing Pit & Fissure Sealant, Dentsply Ash) included no treatment (the control treatment), a 20-second exposure to an air/water syringe spray, 20 seconds' manual application of a wet or dry cotton roll, 20 seconds' manual application of pumice with a cotton pellet, and 20 seconds' application of a water/pumice slurry using a prophy cup on a slow-speed handpiece. The authors used high-pressure liquid chromatography to analyze the amount of monomers--bisphenol A glycidyl dimethacrylate, or Bis-GMA; triethylene glycol dimethacrylate, or TEGDMA; and bisphenol A dimethacrylate, or Bis-DMA--remaining after each treatment.
A one-way analysis of variance indicated that use of only an air/water spray removed the least (P = .0001) amount of all monomers (only 68.3 percent of the control value). Application of wet or dry cotton reduced equivalent amounts of monomers (86.1 to 88.9 percent of the control value), and the amount of monomer remaining was less than that for the air/water syringe treatment (P = .0001). The use of pumice on either a cotton ball or in a prophy cup achieved the greatest reduction (P = .0001) in total amount of residual monomer (92.9 to 95.3 percent of the control value).
Treatment that used pumice eliminated the greatest amount (from 93 percent to 95 percent of the untreated control values) of any type of residual monomer. A slurry of pumice is significantly more effective in removing the oxygen-inhibited layer from freshly cured sealants than either an air/water spray or wet or dry cotton alone.
Clinicians can most effectively reduce patients' exposure to the uncured components in the oxygen-inhibited layer of sealants by using a mild abrasive, such as pumice, either on a cotton applicator or in a prophy cup.
作者开展研究，以检验六种表面处理方法对减少一种市售的、新聚合的、光固化无填料牙科密封剂的氧抑制层的效果。
光固化密封剂（Delton光固化窝沟封闭剂，登士柏公司）的表面处理方法包括不处理（对照处理）、用空气/水注射器喷雾20秒、用湿或干棉卷手动涂抹20秒、用棉球手动涂抹浮石粉20秒，以及用低速手机上的洁治杯涂抹水/浮石粉糊剂20秒。作者使用高压液相色谱法分析每种处理后剩余的单体——双酚A缩水甘油醚二甲基丙烯酸酯（Bis-GMA）、三乙二醇二甲基丙烯酸酯（TEGDMA）和双酚A二甲基丙烯酸酯（Bis-DMA）——的量。
单因素方差分析表明，仅使用空气/水喷雾去除的所有单体的量最少（P = 0.0001）（仅为对照值的68.3%）。使用湿或干棉卷去除的单体量相当（为对照值的86.1%至88.9%），且剩余的单体量少于空气/水注射器处理（P = 0.0001）。在棉球上或洁治杯中使用浮石粉，残留单体总量的减少幅度最大（P = 0.0001）（为对照值的92.9%至95.3%）。
使用浮石粉的处理方法能去除任何类型的残留单体中的最大量（从未处理对照值的93%至95%）。浮石粉糊剂在从新固化的密封剂上去除氧抑制层方面比单独使用空气/水喷雾或湿或干棉卷显著更有效。
临床医生通过在棉棒上或洁治杯中使用温和磨料（如浮石粉），可以最有效地减少患者接触密封剂氧抑制层中未固化成分的机会。
