Papers by Keyword: Titanium Mesh

Abstract: Calvarial bone defects are due to cranial bone removal at the end of the surgery (decompressive craniectomy), either because of bone involvement of the tumor or as a method to relieve intracranial pressure caused by important cerebral edema secondary to large tumors or traumas. With the progress of biomedical technology, new materials are available for use by surgeons. The titanium mesh implant is a plating platform with a matrix design and MRI compatibility that can be easily shaped, cut, and bent by the surgeon according to the bone defect. It is locked in place by several screws tapped into the bone. Although may different type of materials are currently available there is no consensus for the best method to be used. The aim of this study was to report our experience with titanium mesh implants for cranial repair and reconstruction of bone anatomy.Twenty four patients with decompressive craniectomies that required reconstruction of the calvarial bone defect for which a titanium mesh cranioplasty was used, operated in our Neurosurgery Department between January 2013 and April 2016 where included in this retrospective study. Of the 24 patients, only one had a localized infection complication for which the patient was re-operated and the implant removed with no other complications. No other neurological, infectious and functional complications were observed during or after surgery. All other patients had excellent anatomic and functional results with a positive feedback for the aesthetic aspects of the implant. The use of these bio-compatible materials is a viable, safe and reliable solution for the management of cranial bone defects offering the surgeon a large array of options for the benefit of the patient. It has a proven cost-effectiveness when compared to other customized prosthetics with the same outcomes. The MRI compatibility was proven very useful, especially for neoplasm patients who required frequent cranial imaging follow-ups, and reduced operating time was particularly beneficial to elderly patients.

Abstract: . In order to obtain suitable titanium mesh MEA (membrane electrode assembly) for direct methanol fuel cell (DMFC) molding temperature conditions, titanium mesh was used as electrode substrate material, Nafion 117 membrane was used as proton exchange membrane, PtRu/XC-72R and Pt/XC-72R were used as anode catalyst and cathode catalyst respectively, anode and cathode of titanium mesh MEA were prepared by drop-coating method. When the MEAs were molded by hot-pressing under 5 MPa for 180 s with different temperatures of 115°C, 135°C and 155°C, respectively, the maximum power density of Ti mesh-based MEAs increases firstly, after the first peak, it gradually decreases along with the increase of molding pressure conditions, and the maximum power density appears at the molding temperature of 135°C, so conclude that molding temperature of 135°C is more appropriate for making the titanium mesh MEA.

Abstract: Multi-point holder forming (MPHF) adopts series of coupled holder punches, arranged between forming punches, to clamp the whole sheet in the forming zone. The multi-point holder forming processes of spherical parts of titanium mesh plate were simulated by finite element code, and the results were compared with those of multi-point die forming (MPDF). The influence of holder punch load on the deformation of spherical part in multi-point holder forming was investigated. The shape error analysis of titanium mesh formed by MPHF was performed in finial. The results showed that the spherical part had more excellent performance in multi-point holder forming, and the more deformation the titanium mesh was, the larger force of holder punch would be needed. In addition, there was a small shape error for titanium mesh part formed by MPHF before springback.