Goiato Marcelo Coelho, de Medeiros Rodrigo Antonio, da Silva Emily Vivianne Freitas, Sônego Mariana Vilela, Dos Santos Daniela Micheline
a Department of Dental Materials and Prosthodontics , Aracatuba Dental School, São Paulo State University (UNESP) , Aracatuba , Brazil.
J Med Eng Technol. 2017 May;41(4):309-313. doi: 10.1080/03091902.2017.1299230. Epub 2017 Mar 29.
New systems are released in the odontological market with the objective of bringing improvements and advancements in the clinical success of implants and implant-supported prostheses. The distribution of tension for the bone/implant system of these new systems is important. The purpose of this work was to evaluate, by photoelastic analysis and strain gauges, the distribution of tension for the bone/implant system, using the Slim system. A photoelastic cast with an external hexagon implant was manufactured and a metal prosthesis was screwed below it, with or without the tested system. For the photoelasticity methodology, a photoelastic cast, with or without the tested system, was positioned in a circular polariscope, and axial loads of 100 N were applied to the centre of the crown. The pattern of tension generated was photographed and analysed qualitatively in an imaging programme. For the extensometry methodology, two extensometers were placed in the mesial and distal region of the implant in the photoelastic cast. The axial loads were applied to the group again, with or without the system (n = 10). The t test of independent samples with a significance level of 5% was used for this analysis. This study demonstrated greater tension values for both the photoelastic and extensometry methods when the tested system was used. Clinical studies must be performed to evaluate the tested system because the results might not be clinically significant to a bone reabsorption.
牙科市场推出了新系统，旨在改善和推进种植体及种植体支持的修复体的临床成功率。这些新系统的骨/种植体系统的张力分布很重要。本研究的目的是通过光弹性分析和应变片，使用Slim系统评估骨/种植体系统的张力分布。制作了带有外六角种植体的光弹性模型，并在其下方旋入金属修复体，有或没有测试系统。对于光弹性方法，将有或没有测试系统的光弹性模型置于圆偏振光镜中，在牙冠中心施加100 N的轴向载荷。在成像程序中对产生的张力模式进行拍照并定性分析。对于引伸计方法，在光弹性模型中的种植体的近中和远中区域放置两个引伸计。再次对有或没有该系统的组施加轴向载荷（n = 10）。本分析采用显著性水平为5%的独立样本t检验。本研究表明，使用测试系统时，光弹性和引伸计方法的张力值都更高。必须进行临床研究以评估测试系统，因为结果可能对骨吸收没有临床意义。
