Abstract
Craniofacial bone defects that produce morphological and functional disabilities can bring alteration of the quality of patient’s life. For this reason, the collaboration between the field of medicine with engineering, lead to the manufacture of custom implants from biocompatible materials. In the last years it was shown that Additive Manufacturing methods are very helpful to achieve customized medical implants. All the customized implants made of biocompatible materials have to be tested for mechanical properties, in order to have the optimal characteristics for the area were will be used. This paper presents the results for bending and compression tests for a biocompatible material, PA 2200. The samples were achieved using Selective Laser Sintering method and were obtained with different laser power, starting with 4 W. Maximum load, maximum stress, specific deformation and Young's modulus were analysed. The study showed that different mechanical properties can be obtained, depending on the laser power used. At bending tests, increasing values were obtained for the investigated parameters along with laser power increasing, but at compression tests a different trend was observed.
Highlights
A successful result for repairing of complex craniofacial bone defects depends on the defect size, the quality of the soft tissue covering the defect, and the choice of reconstructive method
The complex craniofacial skeleton is involved with various specific functions, such as protection of the brain and optic tracts, breathing, mastication, speech, and hearing [1,2].For this reason is very important to know the forces and which are the required mechanical properties for the future implant that will take over all the forces from the area
2 and 3 are presented the mechanical properties obtained at the bending tests for PA 2200 samples obtained at 4W, 4.5W and 6W.For samples manufactured at 4W, analysing the results obtained for each characteristics, it was observed that the values were close to each other and were determined standard deviations 4.906 for maximum load, 3.098 for maximum stress and 77.464 for Young's modulus
Summary
A successful result for repairing of complex craniofacial bone defects depends on the defect size, the quality of the soft tissue covering the defect, and the choice of reconstructive method. Generation of contoured 3D prostheses for craniofacial reconstruction [2].Computer technology has moved forward with the advent of Additive Manufacturing techniques which allow both the production of models of the hard tissues and custom-made prostheses from computerised scanning data [3]. For a future cranial implant are very important the bending and compression tests, that can show the stresses in normal and accidental situations. These stresses are much closer to the real situation from the human body. In the OLWHUDWXUH WKHUH DUH IHZ VWXGLHV WKDW UHSRUWHG WKH SURSHUWLHV RI FUDQLDO ERQH DW. SURSHUWLHV IRU DQ DGXOW FUDQLDO ERQH 7KH LQIDQW FUDQLDO ERQH ZDV DQDO\VHG E\ RWKHU
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