Angulated versus parallel headless cannulated screw fixation for type 1 capitellum fracture: A finite element study
Year: 2020
Type: article
Abstract: Aim: The unique shape and vascularization make capitellar fractures challenging to treat. In such cases, screw inclination is crucialto achieve stable fixation. In the present study, we aimed to evaluate the mechanical outcome of the different fixation angles formedby headless cannulated screws for treatment of type 1 capitellum fracture and compared interfragmentary displacement (IFD) usingfinite element analysis (FEA).Material and Methods: In our study, three-dimensional finite element stress analysis was applied using the isotropic materials andstatic linear analysis. Stochastic screw inclination scenarios (Case 1, Case 2, Case 3, and Case 4) were generated, and perpendicularapplication of loads were simulated with magnitudes between 50 and 300 N on the elbow at angulations from 0º to 145º. The IFD inthe four different screw inclination pairs were listed in the ANSYS general end processor. Relative IFD was calculated by measuringthe total displacements in the X/Y/Z planes from 16 different points.Results: According to the modeling, the magnitude of IFD was significantly different in terms of the force and the case factorsunder four altered forces. Analysis of displacement exhibited a significant difference in the force values of ‘100N/200N/300N’ andin the screw inclinations of Case 2 only. Although the interaction effect between the Force*Case was observed to be low, the mostnoticeable results were obtained from the “300N*Case 2.” pair compared to the others (p<0.05).Conclusion: Screws used for fracture fixation must maintain an anatomical correction, until it heals. Following a complex traumasuch as a capitellar fracture, the elbow joint needs a stable fixation and early mobilization
Source: Annals of Medical Research
Authors: Nazmi Alp, Tugba Efendigil, Ozgur Demir, Kerem Bilsel, Onur Kalay, Fatih Karpat, Oguz Dogan, Gokhan Akdag
Language: English
Subfield: Rehabilitation
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
OpenAlex ID: W3095299737