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Abstract：
This study aims to analyse, using a finite element analysis, the effects of Ti-base abutment height on the distribution and magnitude of transferred load and the resulting bone microstrain in the bone-implant system. A three-dimensional bone model of the mandibular premolar section was created with an implant placed in a juxta-osseous position. Three prosthetic models were designed: a 1 mm-high titanium-base (Ti-base) abutment with an 8 mm-high cemented monolithic zirconia crown was designed for model A, a 2 mm-high Ti-base abutment with a 7 mm-high crown for model B, and a 3 mm-high abutment with a 6 mm-high crown for model C. A static load of 150 N was applied to the central fossa at a six-degree angle with respect to the axial axis of the implant to evaluate the magnitude and distribution of load transfer and microstrain. The results showed a trend towards a direct linear association between the increase in the height of the Ti-base abutments and the increase in the transferred stress and the resulting microstrain to both the prosthetic elements and the bone/implant system. An increase in transferred stress and deformation of all elements of the system, within physiological ranges, was observed as the size of the Ti-base abutment increased.
摘要：
本研究旨在分析,使用有限元分析，钛基基牙高度对转移载荷的分布和大小以及骨植入物系统中产生的骨微应变的影响。创建下颌前磨牙部分的三维骨骼模型，并将植入物放置在骨近处。设计了三种假体模型：为模型A设计了1mm高的钛基（Ti基）基牙和8mm高的水泥整体式氧化锆冠，型号B的2毫米高的钛基基台，冠高7毫米，以及用于模型C的3mm高的基牙和6mm高的冠部。以相对于植入物的轴向轴成6度角的方式向中央窝施加150N的静载荷，以评估载荷传递和微应变的大小和分布。结果表明，Ti基基台高度的增加与传递应力的增加以及对假体元件和骨/植入物系统产生的微应变之间存在直接线性关联的趋势。系统所有元素的转移应力和变形的增加，在生理范围内，随着Ti基基台尺寸的增加而观察到。
