不同处理方案后树脂复合树脂核的表面特性及其与CAD/CAM树脂基玻璃陶瓷修复体的粘结强度。
Surface characteristics of resin composite cores and bond strength to CAD/CAM resin matrix glass-ceramic restorations after different treatment protocols.
作者信息
Pereira Leandro Maruki, de Melo Bárbara Inácio, Netto Verena Paula Stern, Bernardes Paola, Raposo Luís Henrique Araújo, Prudente Marcel Santana, das Neves Flávio Domingues
机构信息
Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlandia, Av. Pará, 1720, Bloco 4L, Anexo A, sala 4LA-42, Campus Umuarama, Uberlândia, Minas Gerais, 38405-320, Brazil.
Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil.
出版信息
Odontology. 2024 Dec 4. doi: 10.1007/s10266-024-01034-9.
The purpose of this study was to evaluate the impact of various mechanical surface treatments on the surface roughness and microtensile bond strength (µTBS) of aged composite resin cores bonded to CAD/CAM restorations. Composite resin specimens (Filtek Z350 XT, 3M-ESPE/Solventum) were thermally aged and subsequently divided into four groups (n = 36) according to surface treatments: UI-cleaning with ultrasonic diamond tip; AO-sandblasting with 50 µm AlO; DB-cleaning with diamond burs; and CG-positive control group, without aging or surface treatment. Surface roughness was assessed using a profilometer and interferometer, with measurements taken on both sides of each specimen (n = 12). The surface characteristics were further analyzed through scanning electron microscopy (SEM) (n = 12). In addition, PMMA blocks were temporarily cemented (n = 12) onto the resin blocks, and after surface treatments, resin matrix glass-ceramic blocks were adhesively luted with dual-cure resin cement (RelyX Ultimate, 3 M-ESPE/ Solventum, St. Paul, MN, USA) to the resin composite substrates. The CG specimens were adhesively luted to the indirect restorations without temporary restorations or surface treatment. After luting, the specimens were sectioned and tested for µTBS. The results (p = 0.05) from the profilometry and interferometry analyses indicated the highest surface roughness values for the DB group, followed by AO, UI, and CG. SEM analysis revealed marked morphological differences among the groups. Regarding µTBS, the GC specimens (25.78 ± 5.70 MPa) and UI specimens (25.56 ± 11.36 MPa) exhibited statistically similar values, which were superior to those of the AO (12.25 ± 4.34 MPa) and DB (13.16 ± 5.59 MPa) groups (p < 0.001), which showed comparable results. In conclusion, the use of ultrasonic diamond tips resulted in the most favorable outcomes in terms of cleaning effectiveness, surface roughness, and bond strength among the surface treatments analyzed for resin composite cores.
本研究的目的是评估各种机械表面处理对与CAD/CAM修复体粘结的老化复合树脂核的表面粗糙度和微拉伸粘结强度（µTBS）的影响。复合树脂标本（Filtek Z350 XT，3M-ESPE/ Solventum）进行热老化，随后根据表面处理分为四组（n = 36）：使用超声金刚石尖进行超声清洁（UI）；用50 µm氧化铝进行喷砂处理（AO）；用金刚石车针进行清洁（DB）；以及CG阳性对照组，未进行老化或表面处理。使用轮廓仪和干涉仪评估表面粗糙度，在每个标本的两侧进行测量（n = 12）。通过扫描电子显微镜（SEM）进一步分析表面特征（n = 12）。此外，将聚甲基丙烯酸甲酯（PMMA）块临时粘结（n = 12）到树脂块上，在表面处理后，用双固化树脂粘结剂（RelyX Ultimate，3M-ESPE/ Solventum，美国明尼苏达州圣保罗）将树脂基质玻璃陶瓷块粘结到树脂复合基质上。CG标本粘结到间接修复体上，未进行临时修复或表面处理。粘结后，将标本切片并测试µTBS。轮廓测量和干涉测量分析的结果（p = 0.05）表明，DB组的表面粗糙度值最高，其次是AO、UI和CG。SEM分析显示各组之间存在明显的形态差异。关于µTBS，CG标本（25.78±5.70 MPa）和UI标本（25.56±11.36 MPa）表现出统计学上相似的值，优于AO组（12.25±4.34 MPa）和DB组（13.16±5.59 MPa）（p < 0.001），AO组和DB组结果相当。总之，在所分析的树脂复合核表面处理中，使用超声金刚石尖在清洁效果、表面粗糙度和粘结强度方面产生了最有利的结果。
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