Department of Oral Implantology, Discipline of Dental Technology, Faculty of Dental Medicine, University of Medicine and Pharmacy "Grigore T. Popa", 700115 Iasi, Romania.
Department of Surgery, Discipline of Community Dentistry, Faculty of Dental Medicine, University of Medicine and Pharmacy "Grigore T. Popa", 700115 Iasi, Romania.
Medicina (Kaunas). 2022 Jun 16;58(6):811. doi: 10.3390/medicina58060811.
Background and Objectives: The surface condition of the materials that are used for temporary prostheses influences their microbial colonization, with a direct impact on the oral tissues. This study aims at a comparative analysis of three types of resins for temporary bridges using conventional and digital technologies. The attention was focused on the analysis of the surface characteristics and mechanical strength of these materials. Materials and Methods: The surface condition was assessed for three distinct materials both before and after polishing- heat-curing resin Superpont C + B (SpofaDental, Jicin, Czech Republic) used unconventional technology, Zotion dental milling polymethyl methacrylate (PMMA) block (Zotion, Chongqing, China) for provisional crowns/bridges used in digital subtractive technologies and Freeprint Temp (Detax GmbH & Co. KG, Ettlingen, Germany) resin for temporary crowns and bridges that are used in 3D printing technologies. The two-way ANOVA analysis indicated that polishing leads to a statistically significant increase in roughness coefficients for all the three resins that were tested (p < 0.001). While the highest roughness coefficients were displayed in the 3D cured sample, the largest decrease was reported by the milled sample Results: The results revealed that surface roughness was significantly influenced by both the type of resin that was used (p < 0.001) and the treatment that was induced by finishing and polishing (p < 0.001). Similar p-values were obtained for each of the three resins. Conclusions: The results demonstrated a significant optimization of the surfaces after finishing and polishing and statistically significant differences between the surface parameters and the mechanical properties of the samples. The low values of the roughness and the acceptable values of the mechanical resistance for the conventional samples indicate these materials for the long-term temporary bridge’s realization, allowing the correct restoration of the functions and the rehabilitation at the oral level.
用于临时义齿的材料表面状况会影响其微生物定植，从而直接影响口腔组织。本研究旨在对三种使用传统和数字技术的临时桥用树脂进行比较分析。重点分析了这些材料的表面特性和机械强度。
对三种不同材料的表面状态进行了评估，分别是未经抛光和经抛光后的热固化树脂 Superpont C + B（SpofaDental，捷克共和国 Jicin）、用于数字减法技术的临时冠/桥的 Zotion 牙科铣削聚甲基丙烯酸甲酯（PMMA）块（Zotion，中国重庆）和用于临时冠/桥的 3D 打印技术的 Freeprint Temp（Detax GmbH & Co. KG，德国埃特林根）树脂。双向方差分析表明，抛光会导致所有三种测试树脂的粗糙度系数均有统计学显著增加（p < 0.001）。虽然 3D 固化样品显示出最高的粗糙度系数，但铣削样品报告的粗糙度系数下降最大。
结果表明，表面粗糙度受到所使用的树脂类型（p < 0.001）和精整与抛光所引起的处理（p < 0.001）的显著影响。三种树脂均获得了相似的 p 值。
研究结果表明，经精整和抛光后表面得到了显著优化，且样品的表面参数和机械性能之间存在统计学显著差异。常规样品的粗糙度值较低且机械强度值可接受，表明这些材料适用于长期临时义齿的实现，能够正确恢复功能和口腔水平的修复。
