J Adhes Dent. 2024 Mar 11;26:79-86. doi: 10.3290/j.jad.b5053367.
This investigation aimed to assess the impact of additive manufacturing-generated surface textures on zirconia bond strength.
Zirconia samples (n = 144) fabricated using digital light-processing (DLP) technology were categorized into 6 groups according to the type of surface conditioning (group NN: no designs, no air abrasion; group NY: no designs, with air abrasion; group GN: groove designs, no air abrasion; group GY: groove designs with air abrasion; group HN: hexagon grid, no air abrasion; group HY: hexagon grid, with air abrasion). Composite resin cylinders were cemented to the treated zirconia surfaces with dual-curing, self-adhesive resin cement (Clearfil SA Luting). The shear bond strength (SBS) was tested after water storage for 3 days or 3 days with an additional 10,000 thermocycles.
The zirconia samples fabricated using DLP technology have high accuracy. The SBS of the NY, GY, and HY groups did not significantly differ after 3 days, and neither did the SBS of the NN, GN, and HN groups. The NN, NY, and HY groups exhibited reduced SBS compared to their initial values following artificial aging, while the SBS of the remaining three groups were not diminished. The GY group obtained the highest SBS value after aging.
Printing grooves with air abrasion can improve the bond strength.
本研究旨在评估增材制造生成的表面纹理对氧化锆结合强度的影响。
使用数字光处理（DLP）技术制造的氧化锆样本（n = 144）根据表面处理类型分为 6 组（组 NN：无设计，无喷砂；组 NY：无设计，有喷砂；组 GN：槽型设计，无喷砂；组 GY：槽型设计，有喷砂；组 HN：六边形网格，无喷砂；组 HY：六边形网格，有喷砂）。用双固化自粘接树脂水泥（Clearfil SA Luting）将复合树脂圆柱粘结到处理后的氧化锆表面上。水储存 3 天后或水储存 3 天后再加 10,000 次热循环后测试剪切结合强度（SBS）。
使用 DLP 技术制造的氧化锆样本具有高精度。在 3 天后，NY、GY 和 HY 组的 SBS 没有显著差异，NN、GN 和 HN 组的 SBS 也没有显著差异。在人工老化后，NN、NY 和 HY 组的 SBS 与初始值相比降低，而其余三组的 SBS 没有降低。在老化后，GY 组获得了最高的 SBS 值。
喷砂形成的槽型可以提高结合强度。
