Czechowski Łukasz, Dejak Beata, Konieczny Bartłomiej, Krasowski Michał
Department of Prosthodontics MU of Łódź, 92-213 Łódź, Poland.
University Laboratory of Materials Research, Medical University of Łódź, 92-213 Łódź, Poland.
Materials (Basel). 2023 Aug 31;16(17):6006. doi: 10.3390/ma16176006.
Pathological tooth wear is an escalating social problem. Occlusal veneers can be an alternative to traditional prosthetic restorations such as crowns, inlays, and onlays.
The aim of this study is to assess the fracture resistance of occlusal veneers made of various materials depending on their thickness.
In total, 120 occlusal veneers were examined. The restorations were made of four ceramics: leucite LC (IPS Empress Esthetic), hybrid HC (Vita Enamic), lithium disilicate LDC (IPS e.max Press), and zirconium oxide ZOC (Ceramill Zolid HT). A total of 30 veneers were made of each material, 10 for each of the three thicknesses: 1 mm, 1.5 mm, 2 mm. The restorations were cemented on identical abutments duplicated from the developed phantom tooth 35 (KaVo) with composite cement (All Bond Universal). The samples prepared in this way were subjected to a compressive strength test in a universal testing machine. Statistical analysis of the results was performed.
The average fracture resistance of occlusal veneers made of zirconium oxide ceramic was 1086-1640 N, of lithium disilicate ceramics 456-1044 N, of hybrid ceramics 449-576 N, and of leucite ceramics 257-499 N.
Occlusal veneers made of ceramics, zirconium oxide and lithium disilicate, had the highest resistance to fractures. Restorations made of leucite ceramics turned out to be the least resistant to forces. The greater the thickness of the ceramic occlusal veneers, the greater their fracture resistance.
病理性牙齿磨损是一个日益严重的社会问题。咬合贴面可作为牙冠、嵌体和高嵌体等传统修复体的替代方案。
本研究旨在评估不同材料制成的咬合贴面在不同厚度下的抗折性。
共检查了120个咬合贴面。修复体由四种陶瓷制成：白榴石LC（IPS Empress Esthetic）、混合陶瓷HC（Vita Enamic）、二硅酸锂LDC（IPS e.max Press）和氧化锆ZOC（Ceramill Zolid HT）。每种材料制作30个贴面，三种厚度（1毫米、1.5毫米、2毫米）各10个。使用复合树脂粘结剂（全粘结通用型）将修复体粘结在从35号模型牙（卡瓦）复制的相同基台上。将以这种方式制备的样本在万能试验机上进行抗压强度测试。对结果进行统计分析。
氧化锆陶瓷制成的咬合贴面平均抗折力为1086 - 1640牛，二硅酸锂陶瓷为456 - 1044牛，混合陶瓷为449 - 576牛，白榴石陶瓷为257 - 499牛。
由陶瓷、氧化锆和二硅酸锂制成的咬合贴面具有最高的抗折性。白榴石陶瓷制成的修复体抗外力能力最差。陶瓷咬合贴面厚度越大，其抗折性越强。
