Abstract
Abstract Three-dimensional (3D) printing technology has the advantages of fast design and fabrication in clinical orthopedics. This study proposed the application of 3D-printed personalized reverse shoulder prosthesis in a reverse total shoulder arthroplasty for a patient with tuberculosis of the shoulder joint. Traditional and personalized shoulder prostheses were compared and studied. The mechanical simulation analysis was conducted on the individualized prosthesis and scapula. A personalized reverse total shoulder prosthesis was fabricated by 3D printing technology. Finite element analyses were conducted for implantation of traditional and personalized prostheses. The numerical results show that the maximum equivalent stress of screws inserted into bone tissue is 43.23 MPa in the personalized prosthesis. But in traditional prostheses, the maximum equivalent stress of screws performing the same function is 246.50 MPa. The structural advantages of the personalized prosthesis effectively reduce the local pressure of the screws to ensure the safety and effectiveness of the material during service. At the same time, the scapula paired with the personalized prosthesis also shown a smaller mean equivalent stress that can reduce patient stress. The postoperative evaluation of implant stability and patient status was good. The results indicated that 3D printing technology has important application value in orthopedic surgery.
Highlights
Bone tuberculosis (TB) is a destructive disease caused by the invasion of bone or joints by Mycobacterium tuberculosis, which is generally divided into two types of articular and spinal TB
Similar scientific research usually simulates the local stress distribution after shoulder prosthesis implantation through finite element analysis, and its research generally focuses on the influence of the fine-tuning of prosthesis structure or implantation mode on the simulation results
Prosthesis and scapula models were designed based on the computed tomographic (CT) data of the patient
Summary
Bone tuberculosis (TB) is a destructive disease caused by the invasion of bone or joints by Mycobacterium tuberculosis, which is generally divided into two types of articular and spinal TB. The titanium alloy artificial shoulder prosthesis was customized design based on the SLM technology, and the structure of traditional prosthesis was innovatively improved. Similar scientific research usually simulates the local stress distribution after shoulder prosthesis implantation through finite element analysis, and its research generally focuses on the influence of the fine-tuning of prosthesis structure or implantation mode on the simulation results. This fine-tuning, such as screw size and angle, basically does not change the gross structure of the prosthesis and is only applicable to the general situation of total shoulder joint replacement surgery. It is necessary to redesign the prosthesis structure according to the characteristics of disease lesions and evaluate its theoretical effectiveness through simulation analysis, which is the innovation of this research
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