Faculty of Mechanical Engineering, Technion, 32000, Haifa, Israel.
Sci Rep. 2017 May 17;7(1):2051. doi: 10.1038/s41598-017-02282-2.
Dental implants interact with the jawbone through their common interface. While the implant is an inert structure, the jawbone is a living one that reacts to mechanical stimuli. Setting aside mechanical failure considerations of the implant, the bone is the main component to be addressed. With most failure criteria being expressed in terms of stress or strain values, their fulfillment can mean structural flow or fracture. However, in addition to those effects, the bony structure is likely to react biologically to the applied loads by dissolution or remodeling, so that additional (strain-based) criteria must be taken into account. While the literature abounds in studies of particular loading configurations, e.g. angle and value of the applied load to the implant, a general study of the admissible implant loads is still missing. This paper introduces the concept of failure envelopes for the dental implant-jawbone system, thereby defining admissible combinations of vertical and lateral loads for various failure criteria of the jawbone. Those envelopes are compared in terms of conservatism, thereby providing a systematic comparison of the various failure criteria and their determination of the admissible loads.
种植牙通过其共同界面与颌骨相互作用。虽然种植体是一种惰性结构，但颌骨是一种有生命的组织，会对机械刺激产生反应。除了考虑种植体的机械失效因素外，骨骼是主要需要解决的部分。由于大多数失效标准都是用应力或应变值来表示的，所以它们的满足可能意味着结构流动或断裂。然而，除了这些影响之外，骨结构很可能会通过溶解或重塑对施加的负荷产生生物反应，因此必须考虑额外的（基于应变的）标准。虽然文献中充斥着对特定加载配置的研究，例如施加到种植体上的角度和负载值，但对可接受的种植体负载的一般性研究仍然缺乏。本文引入了种植牙-颌骨系统失效包络的概念，从而为各种颌骨失效标准定义了可接受的垂直和侧向负载组合。根据保守性对这些包络进行了比较，从而对各种失效标准及其对可接受负载的确定进行了系统比较。
