Angeles Maslucan Romy, Dominguez John Alexis
School of Dentistry, Universidad Peruana Cayetano Heredia, Lima 15037, Peru.
Department of Social Dentistry, School of Dentistry, Universidad Peruana Cayetano Heredia, Lima 15037, Peru.
Materials (Basel). 2022 May 20;15(10):3680. doi: 10.3390/ma15103680.
Conical implant-abutment connections are popular for their stability; however, in other conditions, such as excessive force, implants and abutments can absorb all the stress. Some connections with three points of support can resist more than conical connections. In recent years, different studies has shown that the design of a connection affects its stability. The aim of this study was to analyze and compare the stresses in finite elements (FEs) in a newly proposed conical triangular connection in implants with hexagonal and conical connections. A nonlinear 3D FE parametric model was developed using SOLIDWORKS 2017. All the connections, i.e., external and internal hexagons, morse taper, conical connection, and the new conical triangular proposal were compared when axial forces of 150, 250, and 350 N were applied to the occlusal. The maximum stress was found in the external hexagon. The maximum stress was concentrated at the level of the neck of the abutment, implant, and bone, except for the morse taper; at the level of the crown and abutment, the lowest stress occurred in the new proposal. Conclusions: The new conical triangular (CT) connection and the conical connection (CC) generate similar stress in the implant, abutment, and crown. However, the CT connection improves the CC by reducing stress at the bone level, adding an advantage to having three retention points.
锥形种植体-基台连接因其稳定性而广受欢迎；然而，在其他情况下，如受到过大的力时，种植体和基台会承受所有的应力。一些具有三点支撑的连接比锥形连接能承受更大的应力。近年来，不同的研究表明连接的设计会影响其稳定性。本研究的目的是分析和比较新型锥形三角形连接种植体与六边形和锥形连接种植体在有限元中的应力。使用SOLIDWORKS 2017开发了一个非线性三维有限元参数模型。当向咬合面施加150、250和350 N的轴向力时，对所有连接，即外部和内部六边形、莫氏锥度、锥形连接以及新的锥形三角形连接进行了比较。最大应力出现在外部六边形中。除了莫氏锥度外，最大应力集中在基台、种植体和骨颈部水平；在冠部和基台水平，新设计的应力最低。结论：新型锥形三角形（CT）连接和锥形连接（CC）在种植体、基台和牙冠中产生的应力相似。然而，CT连接通过降低骨水平的应力改进了CC连接，增加了具有三个固位点的优势。
