Vertucci V, Montani M, Arcuri C, Cardelli P
PHD Material for Health, Environment and Energy, University of Rome "Tor Vergata", Rome, Italy.
Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Rome, Italy.
Oral Implantol (Rome). 2017 Apr 10;10(1):53-58. doi: 10.11138/orl/2017.10.1.053. eCollection 2017 Jan-Mar.
It is well known by previous important studies that mandible flexes during different jaw movements. According to this assumption it is very important to know how implant supported fixed partial dentures could restrict mandibular movements and, could lead to excess strain accumulation that could modify the resolution of implant treatment. The aim of our project is to create a bio-faithful model able to recreate mandibular movements, during three point bending test methods of (FIXED -PARTIAL -DENTURES) FPDs, to avoid a not flexible metal base, where models' properties doesn't allow to obtain a bio-faithful simulation during testing phases.
2 implants (premium Sweden and Martina®) were embedded in mandible resin section to mimic osteointegrated implants in premolar and molar areas, in order to recreate a Kennedy Class II configuration. Our mandible test simulator was creating according to the measurement obtained according to the study of Schwartz-Dabney and Dechow (2002). Sample so created is tested with testing machine (Instron 5566, UK) adopting the three point bending mechanical tests configuration.
We can admit that oral cavity is a bio-dynamic system, where different variables incurr, so it's very important that experimental conditions simulate clinical environment. Experimentation should be based on the correlation between the failure mechanisms exhibited for samples and those observed in fractured clinical prostheses made of the same composition and processing conditions. A bio-faithful model could reduce this wide range between and study experimentation.
以往的重要研究已充分表明，下颌骨在不同的颌骨运动中会发生弯曲。基于这一假设，了解种植体支持的固定局部义齿如何限制下颌运动，以及是否会导致过度应变积累从而影响种植治疗效果，具有重要意义。我们项目的目的是创建一个生物逼真的模型，该模型能够在固定局部义齿（FPDs）的三点弯曲测试方法中重现下颌运动，以避免使用不灵活的金属基底，因为在测试阶段，这种模型的特性无法实现生物逼真的模拟。
将2颗种植体（瑞典高端和Martina®）植入下颌树脂切片中，以模拟前磨牙和磨牙区域的骨整合种植体，从而重现肯尼迪II类牙列缺损情况。我们的下颌骨测试模拟器是根据施瓦茨 - 达布尼和德乔（2002年）的研究所得测量数据制作而成。如此制作的样本采用三点弯曲力学测试配置，通过测试机（英国Instron 5566）进行测试。
我们可以承认口腔是一个生物动力系统，存在多种变量，因此实验条件模拟临床环境非常重要。实验应基于样本所表现出的失效机制与在相同成分和加工条件下制作的临床断裂假体中观察到的失效机制之间的相关性。一个生物逼真的模型可以缩小研究与实验之间的这种巨大差距。
