Aoki Ryota, Takamizawa Toshiki, Hayashi Kana, Arai Yuiko, Ishii Ryo, Shoji Mone, Kamimoto Atsushi, Miyazaki Masashi
Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
Dent Mater. 2024 Feb;40(2):379-385. doi: 10.1016/j.dental.2023.12.016. Epub 2024 Jan 4.
This study aimed to investigate the immediate dentin bond performance and bond durability of self-adhesive resin luting cements (RLCs) in combination with universal adhesives in different curing modes.
Two self-adhesive RLCs were used with universal adhesives as primers. They were also used alone as self-adhesive RLCs. Two multiple-step RLC systems were used as comparison materials. To measure the shear bond strength (SBS) in different curing modes, 12 specimens were prepared for each group. Stainless-steel rods were bonded to bovine dentin, and the bonded specimens were assigned to the baseline group (stored for 24 h) and artificially aged group (thermal cycling [TC], 10,000 cycles). After each storage period, the SBS of the bonded specimens was measured. The Knoop hardness number (KHN) of the cured RLCs was measured with or without primer application in different curing modes at 24 h and after 10,000 TC. The representative RLC/dentin interfaces were observed using scanning electron microscopy (SEM).
Dentin SBS was significantly influenced by the RLC system but not by the curing mode. Self-adhesive RLCs alone showed significantly lower SBS values than self-adhesive RLCs with primer regardless of the curing mode or storage period. The storage period, curing mode, and RLC system significantly influenced the KHN.
The use of universal adhesives as a primer may help enhance the immediate dentin bond performance and bond durability of self-adhesive RLCs.
本研究旨在探讨自粘接树脂水门汀（RLC）与通用型粘接剂联合使用在不同固化模式下的即时牙本质粘接性能和粘接耐久性。
使用两种自粘接RLC与通用型粘接剂作为底涂剂，同时也单独作为自粘接RLC使用。使用两种多步骤RLC系统作为对照材料。为测量不同固化模式下的剪切粘接强度（SBS），每组制备12个样本。将不锈钢棒粘接至牛牙本质，粘接后的样本分为基线组（储存24小时）和人工老化组（热循环[TC]，10000次循环）。在每个储存期后，测量粘接样本的SBS。在24小时以及10000次TC后，测量固化的RLC在有无使用底涂剂的不同固化模式下的努氏硬度值（KHN）。使用扫描电子显微镜（SEM）观察代表性的RLC/牙本质界面。
牙本质SBS受RLC系统显著影响，但不受固化模式影响。无论固化模式或储存期如何，单独使用自粘接RLC的SBS值均显著低于使用底涂剂的自粘接RLC。储存期、固化模式和RLC系统对KHN有显著影响。
使用通用型粘接剂作为底涂剂可能有助于提高自粘接RLC的即时牙本质粘接性能和粘接耐久性。
