Finite element analysis to verify the rationality of bone cement combined with plate internal fixation for benign proximal femoral lesions
10.3969/j.issn.2095-4344.2632
- Author:
Zhaoxin YANG
1
Author Information
1. Department of Orthopedic Trauma, Affiliated Hospital of Chengde Medical College
- Publication Type:Journal Article
- Keywords:
Benign lesion;
Bone defect;
Finite element;
Internal fixation;
Proximal femur;
Steel plate;
Tumor
- From:
Chinese Journal of Tissue Engineering Research
2020;24(15):2368-2373
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: For the patients with benign osteopathy, the patients usually get a good life cycle after surgical treatment. Through continuous improvement of the operation mode, the stress of the proximal femur after the operation of benign osteopathy is studied by using the finite element analysis. The risk of pathological fracture and secondary fracture is predicted and reduced. To explore the best operation and prognosis is of great significance for prolonging and improving the quality of life of patients. OBJECTIVE: Three-dimensional finite element technique was used to analyze the different surgical models of benign proximal femoral lesions. The differences of different surgical models were compared and the rationality and effectiveness of internal fixation were verified. The reliability of the finite element model was verified in the follow-up of patients after operation. METHODS: Preoperative CT examination was conducted in 10 patients with benign proximal femoral lesions who met the inclusion criteria. Three models of limbs scraping (group A), cavity internal nail re-infusion bone cement (group B) and intracavitary bone cement joint plate screw (group C) were established by MIMICS. The maximum stress values of the left and right side windows of the cortical model of group A, B and C were measured under simulated conditions, and the stress values of the three groups were compared. All patients signed the informed consent. This study was approved by the Hospital Ethics Committee. RESULTS AND CONCLUSION: (1) The comparison of the maximum stress values of the anterior and posterior sides of the cortical fenestration in the three groups of models was group A > group B > group C (P < 0.05). The risk of fracture was high in group A, and the risk of fracture in group B was large. The stress in group C was controlled within a reasonable range, and the risk of fracture was low. (2) Therefore, 10 subjects underwent the treatment in group C. The prognosis was good and there were no secondary fractures. The Musculoskeletal Tumor Society score was 27-30 points 1 year after surgery. (3) The model stress is prone to increase the local stress after opening the window. After adding bone cement and steel plate, the stress value of the model window is significantly reduced. After the benign lesions of the proximal femur are scraped, the stress of the fenestration can be effectively reduced by placing the bone cement and the steel plate, and the fracture probability at the surgical site is significantly reduced. Steel plate placement is reasonable.
