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Implants, Artificial -- Usage, Prosthesis -- Usage, and Titanium alloys -- Chemical properties

Author(s): Xiaopeng Wen[sup.1], Shan Gao[sup.1], Jinteng Feng[sup.1], Shuo Li[sup.1], Rui Gao[sup.1] and Guangjian Zhang[sup.1] Background Customized chest implants are widely used in the repair of chest-wall bony defects. The fixing [...]
Background As 3D printing technology emerge, there is increasing demand for a more customizable implant in the repair of chest-wall bony defects. This article aims to present a custom design and fabrication method for repairing bony defects of the chest wall following tumour resection, which utilizes three-dimensional (3D) printing and rapid-prototyping technology. Methods A 3D model of the bony defect was generated after acquiring helical CT data. A customized prosthesis was then designed using computer-aided design (CAD) and mirroring technology, and fabricated using titanium-alloy powder. The mechanical properties of the printed prosthesis were investigated using ANSYS software. Results The yield strength of the titanium-alloy prosthesis was 950 [+ or -] 14 MPa (mean [+ or -] SD), and its ultimate strength was 1005 [+ or -] 26 MPa. The 3D finite element analyses revealed that the equivalent stress distribution of each prosthesis was unifrom. The symmetry and reconstruction quality contour of the repaired chest wall was satisfactory. No rejection or infection occurred during the 6-month follow-up period. Conclusion Chest-wall reconstruction with a customized titanium-alloy prosthesis is a reliable technique for repairing bony defects. Keywords: 3D printing, Titanium-alloy prosthesis, Chest-wall bony defect, Rapid prototyping

Implants, Artificial -- Usage, Implants, Artificial -- Health aspects, Prosthesis -- Usage, Prosthesis -- Health aspects, Rapid prototyping -- Usage, Cardiovascular diseases -- Research, Cardiovascular diseases -- Care and treatment, and Cardiovascular diseases -- Complications and side effects

Author(s): Opas Satdhabudha[sup.1] Background/Introduction The innovation from merging computed tomography (CT) measurement data to rapid prototyping, that now allow the production of solid copies of the patient's bones, has presented [...]

Chest -- Diseases, Chest -- Diagnosis, Chest -- Care and treatment, Chest -- Case studies, Chest -- Surgery, Chest -- Usage, and Chest -- Health aspects

Author(s): Tong Qiu[sup.1], Yandong Zhao[sup.1], Jianfang Song[sup.2], Bo Fu[sup.1], Yunpeng Xuan[sup.1] and Wenjie Jiao[sup.1] Background Carina resection and reconstruction is a challenging procedure for thoracic surgeons. The surgical method is [...]
Background Carina resection and reconstruction is a challenging procedure for thoracic surgeons. We describe a novel technique of thoracoscopic carina reconstruction using the natural bifurcation, following pulmonary resection of the lung neoplasm. To our knowledge, it is the first report of this kind. Case presentation A 71-year-old male diagnosed of squamous cell lung cancer received two-port approached video-assisted thoracoscopic right bilobectomy with carina resection after 2 cycles of neoadjuvant therapy. After the removal of right lower lobe and middle lobe, the 7 station lymph nodes were resected with the invaded carina and bronchial walls in an en-bloc fashion. The neocarina was reconstructed by the natural bifurcation between the right upper bronchus and the bronchus intermedius. Intraoperative blood loss was about 220 mL, and operative time was about 225 min. The postoperative course was uneventful. The pathological TNM stage was pT3N2M0, IIIA. Adjuvant chemotherapy using gemcitabine and cisplatin was administered for 4 cycles. Follow-up 6 months after surgery confirmed no stenosis and no signs of local recurrence by bronchoscopy and CT scan. Conclusions We consider that the surgical procedure described here is a new alternative strategy for carina resection and reconstruction in the similar situation. The minimally invasive method is safe and effective for this challenging operation. Keywords: Lung cancer surgery, Tracheal carina, Mediastinal lymph nodes, Minimally invasive surgery, Rapid prototyping