Jefferies Steven R, Boston Daniel W
Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA.
J Clin Dent. 2010;21(1):20-3.
To evaluate the effect ofa nanofilled resin surface sealer (Seal&Protect) on the surface roughness of a hybrid composite resin.
Twelve 15 mm x 2 mm disc composite resin specimens (TPH Spectrum Shade C-2) were fabricated and light-cured under controlled conditions. Specimens were divided into six groups of two discs each. The positive control group was no finishing (Mylar Surface-MS); the remaining five group specimens were all standardized by finishing with an Enhance Finishing Disc prior to a final polishing/surface treatment step or sequence, which included: (1) polishing with a 1 micron aluminum oxide polishing paste; (2) polishing with a sequence of 1 micron and 0.3 micron aluminum oxide polishing pastes; (3) polishing with a one-step diamond polishing cup; (4) application and curing of the nanofiller resin surface sealer; and (5) no further treatment-Enhance finishing disc surface (negative control). Surface roughness (Ra) values (6 Ra values per specimen; 12 Ra values per group) were measured using a Surfcorder SE 1700 profilometer. Data were analyzed by a one-way ANOVA (p < or = 0.05).
Polishing or surface treatment techniques significantly affected the surface roughness (Ra) values of the "finished" hybrid composite resin. Enhance Finishing Disc gave the highest Ra values; Mylar Surface gave the lowest. Application of the nanofilled resin surface sealer, after finishing with the elastomeric bonded-abrasive finishing disc, resulted in significantly lower surface roughness (Ra) values (p < 0.001). Other polishing techniques also significantly reduced the surface roughness of the composite resin surface.
Use of a nanofilled, low-viscosity surface sealer may, after additional laboratory and clinical testing, present an alternative/adjunctive technique in final "polishing"/surface treatment of certain composite resin restoratives.
评估一种纳米填充树脂表面封闭剂（Seal&Protect）对混合复合树脂表面粗糙度的影响。
制作12个15毫米×2毫米的圆盘状复合树脂标本（TPH Spectrum Shade C-2），并在受控条件下进行光固化。标本分为六组，每组两个圆盘。阳性对照组不进行修整（聚酯薄膜表面-MS）；其余五组标本在最终抛光/表面处理步骤或程序之前，均先用Enhance修整盘进行标准化修整，其中包括：（1）用1微米氧化铝抛光膏抛光；（2）依次用1微米和0.3微米氧化铝抛光膏抛光；（3）用一步式金刚石抛光杯抛光；（4）应用并固化纳米填料树脂表面封闭剂；（5）不进行进一步处理-Enhance修整盘表面（阴性对照）。使用Surfcorder SE 1700轮廓仪测量表面粗糙度（Ra）值（每个标本6个Ra值；每组12个Ra值）。数据通过单因素方差分析进行分析（p≤0.05）。
抛光或表面处理技术显著影响“修整后”混合复合树脂的表面粗糙度（Ra）值。Enhance修整盘得到的Ra值最高；聚酯薄膜表面得到的Ra值最低。在用弹性粘结磨料修整盘修整后应用纳米填充树脂表面封闭剂，表面粗糙度（Ra）值显著降低（p<0.001）。其他抛光技术也显著降低了复合树脂表面的粗糙度。
经过更多的实验室和临床测试后,使用纳米填充的低粘度表面封闭剂可能会成为某些复合树脂修复体最终“抛光”/表面处理的一种替代/辅助技术。
