Mongkolnam P, Tyas M J
School of Dental Science, University of Melbourne, Australia.
Dent Mater. 1994 May;10(3):196-202. doi: 10.1016/0109-5641(94)90032-9.
The purpose of this study was to compare seven light-cured lining materials (four glass ionomer and three non-glass ionomer), with a chemical-cured glass ionomer lining material.
Specimens were prepared and tested according to the methods prescribed in Australian/International Standards for compressive strength, diametral tensile strength, depth of cure, radiopacity, and acid erosion. Other tests were adhesion to dentin and adhesion to resin composite.
Compressive strengths ranged from 48.6 MPa to 307.1 MPa, and diametral tensile strengths from 5.8 MPa to 34.8 MPa. Most of the light-cured materials were stronger than the chemical-cured glass ionomer. Depth of cure increased with increased irradiation times, with values of 0.63 mm to 6.43 mm for 60 s irradiation. Radiopacity was in the range of 0.91 mm Al to 1.07 mm Al. All materials were unaffected or only slightly affected by acid erosion. Adhesion to dentin was effectively zero for the non-glass-ionomer products. Adhesion to composite was from 6.23 MPa to 25.1 MPa, and thermocycling affected only three light-cured and the one chemical-cured glass ionomer.
All products complied with the requirements of standards, where available. Incremental placement and curing is necessary for some products. Adhesion to dentin is better with glass ionomers, whereas their adhesion to composite may be unreliable.
本研究旨在比较七种光固化衬层材料（四种玻璃离子体和三种非玻璃离子体）与一种化学固化玻璃离子体衬层材料。
根据澳大利亚/国际标准规定的方法制备并测试样本的抗压强度、径向拉伸强度、固化深度、射线不透性和耐酸腐蚀性。其他测试包括与牙本质的黏附力和与树脂复合材料的黏附力。
抗压强度范围为48.6兆帕至307.1兆帕，径向拉伸强度范围为5.8兆帕至34.8兆帕。大多数光固化材料比化学固化玻璃离子体更强。固化深度随照射时间增加而增加，照射60秒时的值为0.63毫米至6.43毫米。射线不透性在0.91毫米铝至1.07毫米铝范围内。所有材料均未受酸蚀影响或仅受到轻微影响。非玻璃离子体产品与牙本质的黏附力实际上为零。与复合材料的黏附力为6.23兆帕至25.1兆帕，热循环仅影响三种光固化材料和一种化学固化玻璃离子体。
所有产品均符合现有标准要求。某些产品需要分层放置和固化。玻璃离子体与牙本质的黏附力更好，而它们与复合材料的黏附力可能不可靠。
