Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
Department of Fixed Prosthodontics, Faculty of Dentistry, Horus University, New Damietta, Egypt.
BMC Oral Health. 2023 Sep 5;23(1):636. doi: 10.1186/s12903-023-03365-5.
Successful ceramic restorations depend on the strong bonding with resin cement and even stress distribution. The aim of this study was to evaluate the impact of adding MDP-containing zirconia primer before self-adhesive resin cements with different functional acidic monomers on fracture resistance of monolithic zirconia crown.
Eighty defect-free human maxillary premolars were divided according to the cement type and application of MDP-containing zirconia primer into eight groups (n = 10): Calibra Universal (C), Calibra Universal combined with zirconia primer (CZ), RelyX U200 (R), RelyXU200 combined with zirconia primer (RZ), Panavia SA Cement Plus (P), Panavia SA Cement Plus combined with zirconia primer (PZ), Multilink Speed (M), and Multilink Speed combined with zirconia primer (MZ). After teeth preparation and fabrication of zirconia crowns, each crown was bonded to its corresponding tooth. All specimens were subjected to 10,000 thermocycles between 5 and 55°C, followed by cyclic load (50 N) for 240,000 cycles. Each specimen was subjected to a static axial load until fracture using universal testing machine and the fracture load was recorded. The fracture mode studied and recorded. The fracture load results were analyzed using two-way ANOVA test (α = 0.05).
A significant interaction (P = 0.038) of combining MDP-containing zirconia primer and cement type on fracture resistance of monolithic zirconia crown was detected. The mean fracture load values of zirconia crown were significantly influenced by the combined application of the MDP-containing zirconia primer with Calibra Universal (P = 0.01), RelyX U200 (P < 0.001), and Multilink Speed (P = 0.038), while there was no significant difference with Panavia SA Cement Plus (P = 0.660). There was significant difference (F = 20.69, P < 0.001) between the mean fracture loads of groups with self-adhesive cements (C, R, P, and M groups). The highest fracture load was recorded with RZ group (2446.90 ± 126.72 N) while the lowest fracture load was recorded with C group (1623.18 ± 149.86 N).
The self-adhesive resin cement with different acidic functional monomer affects the fracture resistance of monolithic zirconia crown. Application of MDP-containing primer could improve the fracture resistance of monolithic zirconia crown with most self-adhesive cements. The application of an MDP-containing primer had no impact on the fracture resistance of monolithic translucent zirconia crown bonded by MDP-containing self-adhesive resin cement.
成功的陶瓷修复依赖于与树脂水门汀的牢固结合以及均匀的应力分布。本研究的目的是评估在不同功能酸性单体的自粘接树脂水门汀中添加含有 MDP 的氧化锆底漆对整体氧化锆冠抗断裂性能的影响。
将 80 颗无缺陷的上颌前磨牙根据水门汀类型和含有 MDP 的氧化锆底漆的应用情况分为 8 组（n=10）：Calibra Universal（C）、Calibra Universal 联合氧化锆底漆（CZ）、RelyX U200（R）、RelyX U200 联合氧化锆底漆（RZ）、Panavia SA 水泥加（P）、Panavia SA 水泥加联合氧化锆底漆（PZ）、Multilink Speed（M）和 Multilink Speed 联合氧化锆底漆（MZ）。牙齿制备和氧化锆冠制作完成后，将每个冠与相应的牙齿粘结。所有样本均在 5 至 55°C 之间进行 10,000 次热循环，然后进行 240,000 次循环负载（50 N）。使用万能试验机对每个样本施加静态轴向载荷直至断裂，并记录断裂载荷。研究并记录了断裂模式。使用双向方差分析检验（α=0.05）对整体氧化锆冠抗断裂性能的含有 MDP 的氧化锆底漆和水门汀类型的组合的影响进行了分析。
检测到含有 MDP 的氧化锆底漆与水门汀类型的组合对整体氧化锆冠抗断裂性能有显著的交互作用（P=0.038）。氧化锆冠的平均断裂载荷值受到含有 MDP 的氧化锆底漆与 Calibra Universal（P=0.01）、RelyX U200（P<0.001）和 Multilink Speed（P=0.038）联合应用的显著影响，而与 Panavia SA 水泥加（P=0.660）无显著差异。自粘接水门汀（C、R、P 和 M 组）之间的平均断裂载荷存在显著差异（F=20.69，P<0.001）。RZ 组记录的断裂载荷最高（2446.90±126.72 N），C 组记录的断裂载荷最低（1623.18±149.86 N）。
不同酸性功能单体的自粘接树脂水门汀会影响整体氧化锆冠的抗断裂性能。含有 MDP 的底漆的应用可以提高大多数自粘接水门汀的整体氧化锆冠的抗断裂性能。含有 MDP 的底漆的应用对含有 MDP 的自粘接树脂水门汀粘结的整体半透明氧化锆冠的抗断裂性能没有影响。
