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705 results on '"Tu, Chongqi"'

3. Characteristics and patient-reported outcomes of long-term cancer survivors after apatinib-based therapy: an online survey

Author

Zhang, Tingting, Meng, Chao, He, Wei, Xu, Tao, Yang, Yi, Tu, Chongqi, Zhang, Ling, Sun, Xiaofeng, Zhu, Chunrong, Dang, Xueyi, Wang, Ke, Chen, Chuan, Yan, Xiong, Xu, Huiting, Huang, Le, Jiang, Enlai, Xia, Feng, Zhou, Xinming, Zhou, Shunkai, Zang, Weidong, Li, Xifeng, Zhang, Jin, Zheng, Jiaping, Xin, Jianjun, Huang, Bin, Zhu, Guopei, Zhu, Jiexiang, and Liang, Jun

Published
2024
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29. Modular Hemipelvic Prosthesis Preserves Normal Biomechanics and Showed Good Compatibility: A Finite Element Analysis.

Author

Luo, Yuanrui, Sheng, Hongtao, Zhou, Yong, Min, Li, Tu, Chongqi, and Luo, Yi

Subjects
PROSTHESIS design & construction, STRESS concentration, SACROILIAC joint, FINITE element method, MECHANICAL failures
Abstract

This study aimed to evaluate the biomechanical compatibility of a modular hemipelvic prosthesis by comparing stress distributions between an implanted pelvis and a healthy pelvis. Finite element analysis was used to simulate bilateral standing loads on both models, analyzing critical regions such as the sacroiliac joints, iliac crest, acetabulum, and prosthesis connection points. Six models with varied displacements of the hip joint rotational center were also introduced to assess the impact of deviations on stress distribution. The implanted pelvis had a stress distribution closely matching that of the intact pelvis, indicating that the prosthesis design maintained the biomechanical integrity of the pelvis. Stress patterns in displacement models with deviations of less than 10 mm were similar to the standard model, with only minor changes in stress magnitude. However, backward, upward, and inward deviations resulted in stress concentrations, particularly in the prosthesis connection points, increasing the likelihood of mechanical failure. The modular hemipelvic prosthesis demonstrated good biomechanical compatibility with minimal impact on pelvic stress distribution, even with moderate deviations in the hip joint's rotational center; outward, forward, and downward displacements are preferable to minimize stress concentration and prevent implant failure in cases where minor deviations in the rotational center are unavoidable during surgery. [ABSTRACT FROM AUTHOR]

Published
2024
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37. Intercalary Prosthetic Reconstruction with Three‐Dimensional‐Printed Custom‐Made Porous Component for Defects of Long Bones with Short Residual Bone Segments After Tumor Resection

Author

Li, Zhuangzhuang, primary, Lu, Minxun, additional, Zhang, Yuqi, additional, Wang, Jie, additional, Wang, Yitian, additional, Gong, Taojun, additional, He, Xuanhong, additional, Luo, Yi, additional, Zhou, Yong, additional, Min, Li, additional, and Tu, Chongqi, additional

Published
2023
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45. Intercalary Prosthetic Reconstruction with Three‐Dimensional‐Printed Custom‐Made Porous Component for Defects of Long Bones with Short Residual Bone Segments After Tumor Resection.

Author

Li, Zhuangzhuang, Lu, Minxun, Zhang, Yuqi, Wang, Jie, Wang, Yitian, Gong, Taojun, He, Xuanhong, Luo, Yi, Zhou, Yong, Min, Li, and Tu, Chongqi

Abstract

Background: Intercalary reconstruction for patients with short residual bone segments remains challenging. Three‐dimensional (3D)‐printed custom‐made porous implants are a promising technique for short‐segment fixation in these patients. This study aims to evaluate the efficiency of 3D‐printed custom‐made porous components (3DCPCs) for short‐segment fixation, focusing on prosthesis survivorship, radiographic results, and potential complications. Methods: This retrospective study involved 39 patients who underwent intercalary prosthetic reconstruction with 3DCPCs after tumor resection of the femur, tibia, or humerus from June 2015 to October 2020. Segment bone loss involved the femur (n = 15), tibia (n = 16), and humerus (n = 8), leaving 78 residual bone segments. There were 46 short segments requiring 46 3DCPCs and 32 segments with the ability to accommodate 32 off‐the‐shelf standard uncemented stems for prosthesis fixation. Clinical and functional outcomes were evaluated. Prosthesis‐overall survivorship and prosthesis‐specific survivorship were analyzed using Kaplan–Meier survival analysis. Radiographic results and modes of failure of using this technique were also examined. Results: The mean follow‐up was 41 months. The prosthesis‐overall survivorship was 87.2% and 84.6% at 2 and 5 years, respectively. The prosthesis‐specific survivorship was 92.1% and 89.5% at 2 and 5 years, respectively. There was not a substantial difference in prosthesis survivorship among the femur, tibia, and humerus. The average MSTS score was 26.2, ranging from 22 to 28. The radiographic evaluation results revealed excellent or good interface (38/46) in most of the 46 porous components. A total of 38 of 46 bone segments' remolding demonstrated no change. In total, seven patients (16.3%) had complications requiring further surgery. Conclusion: The prosthesis survivorship of using 3DCPCs for short‐segment fixation is similar or better compared to other studies involving intercalary prosthetic reconstruction with short‐segment fixation. Radiographic evaluation revealed good osteointegration and avoidance of stress shielding. Overall, intercalary prosthetic reconstruction with 3DCPC is a feasible modality for patients with short residual bone segments after tumor resection. [ABSTRACT FROM AUTHOR]

Published
2024
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