Soliman Sebastian, Casel Carolin, Krug Ralf, Krastl Gabriel, Hahn Britta
University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Pleicherwall 2, 97070 Würzburg, Germany.
Dent Mater. 2022 Apr;38(4):601-612. doi: 10.1016/j.dental.2021.10.007. Epub 2021 Nov 15.
To evaluate the influence of filler geometry and viscosity of luting composites on marginal adhesive gap width (MGW) and occlusal surface height (OSH) of all-ceramic partial crowns.
Forty-eight all-ceramic partial crowns (Celtra Duo, Dentsply) were created and divided into six groups (n = 8). Restorations were bonded using universal adhesive (Prime & Bond Active, Dentsply) in combination with low-viscosity composites (LV) containing amorphous fillers (Calibra Ceram, Dentsply) (LV-AF), heterogeneous fillers (Tetric EvoFlow, Ivoclar Vivadent) (LV-HF) vs. high-viscosity composites (HV) containing spherical fillers (Ceram.x, Dentsply) (HV-SF) or heterogeneous fillers (Tetric EvoCeram, Ivoclar Vivadent) (HV-HF). HV materials were used either with or without sonication. MGW [µm] was measured by SEM. Displacements of the restorations after luting, such as changes (Δ) in OSH [µm], tilting and rotation [°], were measured using a dial gauge and 3D-analytical software (OraCeck, Cyfex). Statistical analysis was by Mann-Whitney U-test and t-test with α = 0.05.
MGW (p = 0.002) and tilting (p = 0.001) were significantly smaller with LV (228.0 ± 112.35 µm; 0.89 ± 1.25°) than with HV (338.1 ± 97.26 µm; 1.95 ± 1.26°). Sonication had no effect on MGW in HV-HF (332.32 ± 91.39 µm) and HV-SF (343.85 ± 105.48 µm; p = 0.74). Sonication decreased ΔOSH by ~50% with HV-SF (64.21 ± 27.90 µm) but remained unchanged with HV-HF (39.06 ± 14.08 µm; p = 0.004). There was no difference in rotation between HV (0.82 ± 0.81°) and LV (0.61 ± 0.74°; p = 0.29). The LV-AF and LV-HF groups showed no statistical differences in MGW, ΔOSH, tilting or rotation (p > 0.05).
Irrespective of filler geometry and insertion technique, the use of high-viscosity composites for the adhesive cementation of modern all-ceramic partial crowns increases displacement, marginal misfit and occlusal surface height.
评估粘接性复合树脂的填料几何形状和粘度对全瓷部分冠边缘粘接间隙宽度（MGW）和咬合面高度（OSH）的影响。
制作48个全瓷部分冠（Celtra Duo，登士柏），并分为六组（n = 8）。使用通用粘接剂（Prime & Bond Active，登士柏）结合含有无定形填料的低粘度复合树脂（LV）（Calibra Ceram，登士柏）（LV-AF）、异质填料（Tetric EvoFlow，义获嘉伟瓦登特）（LV-HF）与含有球形填料的高粘度复合树脂（HV）（Ceram.x，登士柏）（HV-SF）或异质填料（Tetric EvoCeram，义获嘉伟瓦登特）（HV-HF）进行修复体粘接。HV材料使用或不使用超声处理。通过扫描电子显微镜测量MGW[μm]。使用百分表和3D分析软件（OraCeck，Cyfex）测量粘接后修复体的位移，如OSH[μm]的变化（Δ）、倾斜和旋转[°]。采用Mann-Whitney U检验和t检验进行统计分析，α = 0.05。
LV组（228.0±112.35μm；0.89±1.25°）的MGW（p = 0.002）和倾斜（p = 0.001）显著小于HV组（338.1±97.26μm；1.95±1.26°）。超声处理对HV-HF组（332.32±91.39μm）和HV-SF组（343.85±105.48μm；p = 0.74）的MGW无影响。超声处理使HV-SF组（64.21±27.90μm）的ΔOSH降低约50%，但HV-HF组（39.06±14.08μm；p = 0.004）保持不变。HV组（0.82±0.81°）和LV组（0.61±0.74°；p = 0.29）在旋转方面无差异。LV-AF组和LV-HF组在MGW、ΔOSH、倾斜或旋转方面无统计学差异（p>0.05）。
无论填料几何形状和插入技术如何，使用高粘度复合树脂进行现代全瓷部分冠的粘接固位都会增加位移、边缘不密合和咬合面高度。
