Özcan Berna, Özcivelek Tuğgen
Department of Prosthodontics, Gülhane Faculty of Dentistry, University of Health Sciences, Türkiye Gen Dr Tevfik Saglam St. No: 1 Kecioren, Ankara, Türkiye, Turkey.
BMC Oral Health. 2025 Sep 24;25(1):1425. doi: 10.1186/s12903-025-06854-x.
Bonding between silicone elastomers and rigid substructures is critical to clinical success of extraoral maxillofacial prostheses. This study aimed to investigate the bond strength of silicone elastomers to conventional and alternative 3-dimensional printing resin materials and the effect of artificial aging.
The bond strength of seven resin substructure materials to a maxillofacial silicone was tested using the 180° peel test without artificial aging and after artificial aging in 14 groups. Test specimens composed of a silicone elastomer bonded to a substructure which were prepared according to ASTM D903-98 standard. A total of 70 specimens were prepared with a maxillofacial silicone bonded with a primer to substructures made of chemically polymerized clear acrylic, heat-polymerized clear acrylic and heat-polymerized pink acrylic, 3-dimensional surgical guide, 3-dimensional denture base, 3-dimensional polyetherketoneketone, and 3-dimensional polyetheretherketone resins (n = 10). Half of the specimens (n = 5 per group) were aged in an environmental chamber (Ci4400 Weather-Ometer, Atlas, Inc., USA) to assess the impact of 360 h of accelerated artificial aging. Peel bond strength values were analyzed using two-way ANOVA and post-hoc comparisons with Bonferroni correction (α = 0.05). Bond failures were classified using confocal microscopy.
Substructure material, artificial aging, and their interaction significantly affected peel bond strength (p < 0.001). Polyetherketoneketone and polyetheretherketone exhibited significantly lower mean bond strength in non-aged groups (p < 0.05). Within the aged groups, surgical guide and denture base resins demonstrated significantly higher bond strength (p < 0.05). The most common failure type was mixed (71.4%), followed by adhesive (20%), cohesive (9%).
Three-dimensional printed surgical guide resin and denture base resin specimens showed higher mean bond strength after artificial aging compared to commonly used conventional resin substructures and three- dimensional printed polyetherketoneketone and polyetheretherketone.
硅橡胶弹性体与刚性支撑结构之间的粘结对于口腔外颌面修复体的临床成功至关重要。本研究旨在调查硅橡胶弹性体与传统及替代的三维打印树脂材料之间的粘结强度以及人工老化的影响。
在14个组中，使用180°剥离试验测试了七种树脂支撑结构材料与颌面硅橡胶之间在未进行人工老化以及人工老化后的粘结强度。测试样本由粘结到支撑结构上的硅橡胶弹性体组成，根据ASTM D903-98标准制备。总共制备了70个样本，将颌面硅橡胶与底漆粘结到由化学聚合透明丙烯酸树脂、热聚合透明丙烯酸树脂和热聚合粉色丙烯酸树脂、三维手术导板、三维义齿基托、三维聚醚酮酮和三维聚醚醚酮树脂制成的支撑结构上（n = 10）。一半的样本（每组n = 5）在环境试验箱（Ci4400老化试验箱，美国阿特拉斯公司）中进行老化，以评估360小时加速人工老化的影响。使用双向方差分析和经Bonferroni校正的事后比较（α = 0.05）分析剥离粘结强度值。使用共聚焦显微镜对粘结失败进行分类。
支撑结构材料、人工老化及其相互作用对剥离粘结强度有显著影响（p < 0.001）。在未老化组中，聚醚酮酮和聚醚醚酮的平均粘结强度显著较低（p < 0.05）。在老化组中，手术导板和义齿基托树脂的粘结强度显著较高（p < 0.05）。最常见的失败类型是混合型（71.4%），其次是粘附型（20%）、内聚型（9%）。
与常用的传统树脂支撑结构以及三维打印的聚醚酮酮和聚醚醚酮相比，三维打印的手术导板树脂和义齿基托树脂样本在人工老化后显示出更高的平均粘结强度。
