Abstract：
OBJECTIVE: Studies have not been done to evaluate the peri-implant stress exerted by materials(like PEEK and resin matrix ceramics) in different osseointegration conditions. To investigate the effect of different occlusal materials on peri-implant stress distribution with different osseointegration condition using finite element analysis.
METHODS: Eighteen different 3D FEA models of implant fixed with abutment were created involving 6 different occlusal materials (Heat cured temporary acrylic resin (PMMA), Bis-GMA, PEEK, Lithium disilicate, Resin matrix ceramics and translucent Zirconia) and different osseointegrated conditions (50%, 75%, 100%).
METHODS: Models were subjected to loading vertically and obliquely followed by evaluation of stress distribution.
METHODS: The results of the simulation obtained were analysed in terms of Von mises, maximum principal and minimal principal stresses using descriptive stastistics.
RESULTS: PMMA (40.14 MPa on vertical loading and 66 MPa on oblique loading) resulted in the highest stresses and lithium disilicate (24 MPa on vertical loading and 52.40 MPa on oblique loading) resulted in least stresses among all the crown materials. Upon oblique loading, von Mises stress increases except for translucent zirconia and lithium disilicate (52.444 MPa on 50%, 47.733 MPa on 75%, and 43.973 MPa on 100% osseointegration). Minimal principal stress values decreased with increase in osseointegration upon oblique loading for PMMA, BisGMA, and PEEK.
CONCLUSIONS: Translucent zirconia and lithium disilicate offer a better stress transmission. Minimal principal stress values of PEEK and BisGMA decreased with increasing osseointegration.
METHODS: Eighteen different 3D FEA models of implant fixed with abutment were created involving 6 different occlusal materials (Heat cured temporary acrylic resin (PMMA), Bis-GMA, PEEK, Lithium disilicate, Resin matrix ceramics and translucent Zirconia) and different osseointegrated conditions (50%, 75%, 100%).
METHODS: Models were subjected to loading vertically and obliquely followed by evaluation of stress distribution.
METHODS: The results of the simulation obtained were analysed in terms of Von mises, maximum principal and minimal principal stresses using descriptive stastistics.
RESULTS: PMMA (40.14 MPa on vertical loading and 66 MPa on oblique loading) resulted in the highest stresses and lithium disilicate (24 MPa on vertical loading and 52.40 MPa on oblique loading) resulted in least stresses among all the crown materials. Upon oblique loading, von Mises stress increases except for translucent zirconia and lithium disilicate (52.444 MPa on 50%, 47.733 MPa on 75%, and 43.973 MPa on 100% osseointegration). Minimal principal stress values decreased with increase in osseointegration upon oblique loading for PMMA, BisGMA, and PEEK.
CONCLUSIONS: Translucent zirconia and lithium disilicate offer a better stress transmission. Minimal principal stress values of PEEK and BisGMA decreased with increasing osseointegration.
摘要：
目的：尚未进行研究来评估材料（如PEEK和树脂基质陶瓷）在不同骨整合条件下施加的种植体周围应力。采用有限元分析方法研究不同咬合材料对不同骨结合条件下种植体周围应力分布的影响。
方法：创建了18种不同的基牙固定种植体3DFEA模型，涉及6种不同的咬合材料（热固化临时丙烯酸树脂（PMMA），Bis-GMA,PEEK,二硅酸锂，树脂基体陶瓷和半透明氧化锆)和不同的骨结合条件(50%，75%,100%）。
方法：对模型进行垂直和倾斜加载，然后评估应力分布。
方法：根据Vonmises，使用描述性统计的最大主应力和最小主应力。
结果：PMMA（垂直载荷为40.14MPa，倾斜载荷为66MPa）产生的应力最高，二硅酸锂（垂直载荷为24MPa，倾斜载荷为52.40MPa）产生的应力最小在所有牙冠材料中。在倾斜加载时，vonMises应力增加，除了半透明氧化锆和二硅酸锂(50%时52.444MPa，在75%时47.733MPa，和43.973MPa的100%骨整合)。PMMA的最小主应力值随骨结合的增加而降低，BisGMA,还有PEEK.
结论:半透明氧化锆和二硅酸锂提供更好的应力传递。PEEK和BisGMA的最小主应力值随骨结合的增加而降低。
方法：创建了18种不同的基牙固定种植体3DFEA模型，涉及6种不同的咬合材料（热固化临时丙烯酸树脂（PMMA），Bis-GMA,PEEK,二硅酸锂，树脂基体陶瓷和半透明氧化锆)和不同的骨结合条件(50%，75%,100%）。
方法：对模型进行垂直和倾斜加载，然后评估应力分布。
方法：根据Vonmises，使用描述性统计的最大主应力和最小主应力。
结果：PMMA（垂直载荷为40.14MPa，倾斜载荷为66MPa）产生的应力最高，二硅酸锂（垂直载荷为24MPa，倾斜载荷为52.40MPa）产生的应力最小在所有牙冠材料中。在倾斜加载时，vonMises应力增加，除了半透明氧化锆和二硅酸锂(50%时52.444MPa，在75%时47.733MPa，和43.973MPa的100%骨整合)。PMMA的最小主应力值随骨结合的增加而降低，BisGMA,还有PEEK.
结论:半透明氧化锆和二硅酸锂提供更好的应力传递。PEEK和BisGMA的最小主应力值随骨结合的增加而降低。
