Finite element analysis of Puddu and Tomofix plate fixation for open wedge high tibial osteotomy

Raja Izaham, R.M.A. and Abdul Kadir, M.R. and Abdul Rashid, A.H. and Hossain, M.G. and Kamarul, Tunku (2012) Finite element analysis of Puddu and Tomofix plate fixation for open wedge high tibial osteotomy. Injury, 43 (6). pp. 898-902. ISSN 0020-1383

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Abstract

The use of open wedge high tibial osteotomy (HTO) to correct varus deformity of the knee is well established. However, the stability of the various implants used in this procedure has not been previously demonstrated. In this study, the two most common types of plates were analysed (1) the Puddu plates that use the dynamic compression plate (DCP) concept, and (2) the Tomofix plate that uses the locking compression plate (LCP) concept. Three dimensional model of the tibia was reconstructed from computed tomography images obtained from the Medical Implant Technology Group datasets. Osteotomy and fixation models were simulated through computational processing. Simulated loading was applied at 60:40 ratios on the medial:lateral aspect during single limb stance. The model was fixed distally in all degrees of freedom. Simulated data generated from the micromotions, displacement and, implant stress were captured. At the prescribed loads, a higher displacement of 3.25 mm was observed for the Puddu plate model (p < 0.001). Coincidentally the amount of stresses subjected to this plate, 24.7 MPa, was also significantly lower (p < 0.001). There was significant negative correlation (p < 0.001) between implant stresses to that of the amount of fracture displacement which signifies a less stable fixation using Puddu plates. In conclusion, this study demonstrates that the Tomofix plate produces superior stability for bony fixation in HTO procedures.

Item Type: Article
Additional Information: Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Department of Orthopaedic Surgery, University of Malaya, Kuala Lumpur 50603, Malaysia
Uncontrolled Keywords: Finite element analysis; High tibial osteotomy; Tomofix; Puddu plate; Orthopaedics; Biomechanic
Subjects: R Medicine
R Medicine > RD Surgery
Divisions: Faculty of Medicine
Depositing User: Ms Haslinda Lahuddin
Date Deposited: 04 Jun 2012 02:11
Last Modified: 10 Oct 2018 08:56
URI: http://eprints.um.edu.my/id/eprint/3196

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