Biomaterials and Technology, Department of Reconstructive Dentistry, University Center for Dental Medicine, University of Basel, Basel, Switzerland.
J Prosthodont Res. 2021 Oct 15;65(4):502-508. doi: 10.2186/jpr.JPR_D_20_00051. Epub 2021 Apr 9.
Purpose To test if resin CAD/CAM materials should be considered for zirconia implants and how their mechanical properties affect the fracture load.Methods Fracture load of molar crowns of CAD/CAM materials (VITA CAD-Temp [CT], Cerasmart [CS], Lava Ultimate [LU], Pekkton Ivory [PK]) on zirconia implants (ceramic.implant, 4.0 mm) fixed either with no cement, temporary cement (Harvard Implant semi-permanent [HIS]), self-adhesive (VITA Adiva S-Cem [VAS]) or either one of two adhesive cements (Multilink Automix [MLA], VITA Adiva F-Cem [VAF]) was analyzed. The restorative materials were characterized by their flexural strength, fracture toughness, elemental composition and organic/inorganic ratio while compressive strength of the cements was measured.Results For the fracture load significantly highest mean values were found overall for PK (2921 ±300 N) > LU (2017 ±499 N) > CS (1463 ±367 N) = CT (1451 ±327 N) (p > 0.05). When analyzing the effect of the cement on the fracture load the overall ranking was VAF (2245 ±650 N) ≥ MLA (2188 ±708 N) ≥ VAS (2017 ±563 N) > HIS (1757 ±668 N) = no cement (1595 ±757 N) (p <0.05), meaning fracture load increased with the compressive strength of the cements. Additionally, a linear trend was found between the fracture load and the fracture toughness of the restorative materials.Conclusions All restorative materials exhibited fracture load values similar or higher than lithium disilicate tested previously. Fracture load of CT, CS and LU can be significantly increased when an adhesive cement with a high compressive strength is used.
测试树脂 CAD/CAM 材料是否可用于氧化锆种植体，以及其机械性能如何影响断裂载荷。
分析 CAD/CAM 材料（VITA CAD-Temp [CT]、Cerasmart [CS]、Lava Ultimate [LU]、Pekkton Ivory [PK]）制成的磨牙冠在氧化锆种植体（陶瓷植入物，4.0mm）上的断裂载荷，种植体的固定方式有无粘结剂、临时粘结剂（Harvard Implant semi-permanent [HIS]）、自粘结剂（VITA Adiva S-Cem [VAS]）或两种粘结剂（Multilink Automix [MLA]、VITA Adiva F-Cem [VAF]）中的任意一种。通过弯曲强度、断裂韧性、元素组成和有机/无机比来描述修复材料的特性，同时测量粘结剂的抗压强度。
对于断裂载荷，总体上 PK（2921±300N）>LU（2017±499N）>CS（1463±367N）=CT（1451±327N）（p>0.05）的平均值最高。当分析粘结剂对断裂载荷的影响时，整体排序为 VAF（2245±650N）≥MLA（2188±708N）≥VAS（2017±563N）>HIS（1757±668N）=无粘结剂（1595±757N）（p<0.05），即断裂载荷随粘结剂抗压强度的增加而增加。此外，还发现修复材料的断裂韧性与断裂载荷之间存在线性趋势。
所有修复材料的断裂载荷值均与先前测试的锂硅玻璃陶瓷相似或更高。当使用具有高抗压强度的粘结剂时，CT、CS 和 LU 的断裂载荷可显著提高。
