Three dimensional finite element analysis of nitinol patellar concentrator in treatment of patellar fracture
- VernacularTitle:镍钛聚髌器治疗髌骨骨折的三维有限元分析(英文)
- Author:
Shuogui XU
;
Chuncai ZHANG
;
Jiacan SU
;
Xiaohua LIU
;
Yinong WU
- Publication Type:Journal Article
- Keywords:
nitinol patellar concentrator;
three dimensional finite element analyses;
patellar fracture
- From:
Academic Journal of Second Military Medical University
2001;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To analyze the design of Nitinol Patellar Concentrator (NT-PC) and its biomechanic characteristics for treating comminuted patellar fractures.Methods:NT-PC and patellar was analyzed by ANSYS software,the finite element was three dimension brick unit with 20 nodes, 8 faces, and the degree of freedom was 6.In NT-PC,10 483 units were divided and the number of nodes was 17 959;In Patellar,8 775 units were divided and the number of nodes was 15 847.The patellar model was loaded according to the 5 converging directions of NT-PC.Results:NT-PC had tension force on its internal face and pressure force in its external face.The maximum value was 195.8 MPa and -18 MPa,which was far from its utmost stress and fatigue limit.The memory converging force of NT-PC was 134 N.The stress (0.8 MPa) was evenly distributed on the patellar surface.Stress calculation of every node indicated that positive stress was the main stress.Conclusion: The design of NT-PC is reasonable and has good reusing character.After fixation, exercise is allowed immediately after operation.The continual positive stress is good for the stability of fracture end and fracture healing.
