Teja Obulareddy Vishnu, Dixit Arti, Takhellambam Violeta, Verma Rajnish K, Kumar Sandeep, Kumar Amit
Dentistry, United Smiles, Colonial Heights, USA.
Public Health Dentistry, Vaidik Dental College and Research Centre, Daman, IND.
Cureus. 2024 Feb 21;16(2):e54624. doi: 10.7759/cureus.54624. eCollection 2024 Feb.
Implant-supported restorations have gained popularity in modern dentistry, and the choice of abutment material is crucial for their long-term success. This in vitro study aimed to evaluate the fracture resistance and failure mode of implant-supported restorations using different abutment materials.
Ninety standardized implant-supported restorations were included in the study. Abutments made of titanium, zirconia, and a hybrid material (titanium base with a zirconia veneer) were evaluated. Standardized abutments were fabricated, and screw-retained restorations were fabricated using a resin-based composite material. Cyclic loading was applied using a universal testing machine to simulate masticatory forces. Fracture resistance was measured in terms of the number of cycles to failure (NCF), and failure modes were analyzed.
The findings indicate that zirconia abutments exhibited higher fracture resistance compared to titanium and hybrid abutments. Longer implants demonstrated higher fracture resistance, suggesting improved stability and resistance to mechanical forces. Increased loading angles resulted in decreased fracture resistance of implant-supported restorations, emphasizing the need for proper occlusal adjustment. Central loading showed higher fracture resistance than lateral and posterior loading locations. The distribution of failure modes varied among the abutment materials, with bulk prosthesis fracture being the most common in the titanium group, while abutment fracture was predominant in the zirconia and hybrid groups.
This in vitro study demonstrated that the choice of abutment material significantly influenced the fracture resistance and failure mode of implant-supported restorations. Zirconia abutments exhibited the highest fracture resistance, followed by hybrid and titanium abutments. The failure mode analysis revealed different patterns of failure for each abutment material.
种植体支持的修复体在现代牙科中越来越受欢迎，基台材料的选择对其长期成功至关重要。本体外研究旨在评估使用不同基台材料的种植体支持修复体的抗折性和失效模式。
本研究纳入了90个标准化的种植体支持修复体。对由钛、氧化锆和混合材料（钛基加氧化锆贴面）制成的基台进行了评估。制作了标准化基台，并使用树脂基复合材料制作了螺丝固位修复体。使用万能试验机施加循环载荷以模拟咀嚼力。通过失效循环次数（NCF）测量抗折性，并分析失效模式。
研究结果表明，与钛基台和混合基台相比，氧化锆基台表现出更高的抗折性。更长的种植体显示出更高的抗折性，表明稳定性和对机械力的抵抗力有所提高。加载角度增加导致种植体支持修复体的抗折性降低，强调了适当咬合调整的必要性。中心加载显示出比侧向和后向加载位置更高的抗折性。失效模式的分布在基台材料之间有所不同，钛组中整体修复体骨折最为常见，而氧化锆组和混合组中基台骨折占主导地位。
本体外研究表明，基台材料的选择显著影响种植体支持修复体的抗折性和失效模式。氧化锆基台表现出最高的抗折性，其次是混合基台和钛基台。失效模式分析揭示了每种基台材料不同的失效模式。
