|Table of Contents|

Effect of prosthetic offset angle on lower limb biomechanics in patients with bone tumor-type knee arthroplasty

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2023 20
Page:
3849-3854
Research Field:
Publishing date:

Info

Title:
Effect of prosthetic offset angle on lower limb biomechanics in patients with bone tumor-type knee arthroplasty
Author(s):
WANG Hanghui1; 2; 3; SONG Yixin4; HAN Weihua4; ZHANG Minli2; ZHU Zhengfei5; ZHU Wenxia3
1.Xi'an International Medical Center Hospital,Shaanxi Xi'an 710100,China;2.Medical College of Xi'an International University,Shaanxi Xi'an 710077,China;3.Medical College of Yan'an University,Shaanxi Yan'an 716000,China;4.Honghui Hospital,Xi'an Jiaotong University,Shaanxi Xi'an 710054,China;5.School of Mechanical Engineering,Xi'an Jiaotong University,Shaanxi Xi'an 710054,China.
Keywords:
prosthetic offset angle; bone tumor-type knee arthroplasty; biomechanics
PACS:
R738.1
DOI:
10.3969/j.issn.1672-4992.2023.20.025
Abstract:
Objective:By stepwise changing the offset angle of the total knee prosthesis for malignant bone tumors around the knee joint in the coronal and sagittal planes,we explored the biomechanical impact of the offset angle of the total knee prosthesis for bone tumors on the lower limb joints of patients,with a view to quantifying the installation permission range of the total knee prosthesis for bone tumors in the sagittal and coronal planes.Methods:From September 2010 to March 2020,24 patients with bone tumors underwent total knee replacement surgery in Xijing Hospital Affiliated to Air Force Medical University (6 months after surgery).Constructe a multibody dynamic FDK model for bone and muscle of individual artificial knee joint.Adjust the femoral coronal anatomical valgus angle(FCAVA) offset angle and femoral sagittal mechanical anatomical angle(FSMAA) offset angle of the knee prosthesis component of the patient's individualized skeletal muscle model in the Anybody software,gait analysis and obtain the joint load and joint force curves corresponding to different deflection angles.Range ratio was used to measure the influence of component offset on joint force.Results:The average FCAVA and FSMAA of the prosthesis components were (-0.22±0.97)°,(0.23±1.46)° respectively.When the offset angle of the prosthesis in the coronal plane exceeded 2°,the maximum increase of the hip and knee joint force of the lower limb on the replacement side can reach 25% and 164%.For the standard joint force curve,the peak values of hip and knee joint forces on the healthy side were 4.87 BW and 6.07 BW respectively.The peak force of hip and knee joint on the replacement side was 4.30 BW and 5.40 BW respectively.The allowable offset range of prosthesis installation in the coronal plane was ±2°.The offset angle of the prosthesis in the sagittal plane had no significant effect on the biomechanics of the lower limb joints.Conclusion:The offset angle of the total knee prosthesis of bone tumor in the coronal plane has an obvious impact on the biomechanics of the replacement side.It is suggested that surgeons should try to ensure that the allowable range of the offset angle is ±2° when installing the prosthesis during the operation.

References:

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Memo

Memo:
中国博士后项目（编号：2016M600804)；陕西省博士后项目（编号：2016BSHEDZZ92）；陕西省重点研发计划（编号：2023-YBSF-402，2023-YBSF-250）；延安大学横向科研项目（编号：YAU202212342）；西安国际医学中心医院面上项目（编号：2022MS06）
Last Update: 1900-01-01