Jacobsen N L, Mitchell D L, Johnson D L, Holt R A
Department of Removable Prosthodontics, University of Oklahoma, College of Dentistry, Oklahoma City, USA.
J Prosthet Dent. 1997 Aug;78(2):153-8. doi: 10.1016/s0022-3913(97)70119-7.
Adhesive failure between the liner and the denture base creates an environment for potential bacterial growth and accelerated breakdown of the soft liner resulting in a deteriorating prosthesis.
This study evaluated the effects of a specific sandblasted or lased preparation on the interfacial bonding of polymethyl methacrylate and silicone and polyethyl methacrylate resilient liners.
Polymethyl methacrylate test specimens were fabricated and received one of three surface treatments: untreated (control), sandblasted (250 microns aluminum oxide particles), and lased (carbon dioxide). Polyethyl methacrylate and silicone resilient lining materials were applied to these surfaces and the peel strengths were determined with the American Society for Testing and Materials peelin-adhesion test.
Altering the polymethyl methacrylate surface by sandblasting significantly reduced the peel strengths for the polymethyl methacrylate/polyethyl methacrylate and polymethyl methacrylate/silicone specimens. Altering the polymethyl methacrylate surface by delivering carbon dioxide laser energy to form a grid pattern produced lower peel strengths that were statistically significant from the controls for the polymethyl methacrylate/polyethyl methacrylate specimens, but not so for the polymethyl methacrylate/silicone specimens. Untreated polymethyl methacrylate/polyethyl methacrylate peel strengths were significantly higher than polymethyl methacrylate/silicone.
Results of this study imply that mechanical surface preparation of denture bases before application of a resilient liner may not be warranted.
衬垫与义齿基托之间的粘结失败会为细菌生长创造潜在环境，并加速软衬垫的分解，从而导致义齿恶化。
本研究评估了特定的喷砂或激光处理对聚甲基丙烯酸甲酯与硅树脂以及聚乙基丙烯酸甲酯弹性衬垫界面粘结的影响。
制作聚甲基丙烯酸甲酯测试样本，并对其进行三种表面处理之一：未处理（对照）、喷砂（250微米氧化铝颗粒）和激光处理（二氧化碳）。将聚乙基丙烯酸甲酯和硅树脂弹性衬里材料应用于这些表面，并通过美国材料与试验协会的剥离粘结试验测定剥离强度。
通过喷砂改变聚甲基丙烯酸甲酯表面显著降低了聚甲基丙烯酸甲酯/聚乙基丙烯酸甲酯和聚甲基丙烯酸甲酯/硅树脂样本的剥离强度。通过输送二氧化碳激光能量形成网格图案来改变聚甲基丙烯酸甲酯表面，对于聚甲基丙烯酸甲酯/聚乙基丙烯酸甲酯样本，产生了比对照低的剥离强度，且具有统计学意义，但对于聚甲基丙烯酸甲酯/硅树脂样本则不然。未处理的聚甲基丙烯酸甲酯/聚乙基丙烯酸甲酯的剥离强度显著高于聚甲基丙烯酸甲酯/硅树脂。
本研究结果表明，在应用弹性衬垫之前对义齿基托进行机械表面处理可能没有必要。
