The Effect of Angulated Radius Fractures in Forearm Rotation: A Computer Based ModelReport as inadecuate




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Background: Forearm fractures amongst children are quite a common presentation. The accuracy of correct alignment in forearm bones is important as it determines the degree of forearm rotation pronation-supination. However in children due to the potential for continuous growth, a degree of angulation is acceptable. The aim of this study was to determine the effect of angulation of forearm fracture on forearm rotation using computer stimulation. Methods: Using a 3D computer modelling software Wildfire Pro Engineer 4.0, Creo by PTC, Needham, MA, an accurate to scale model of the radius and ulna was replicated from a 7 year old forearm. A realistic representation of pronation-supination of the forearm was applied and a fracture at the junction of proximal one third and distal two third was created. A rotational simulation was created and ended when maximum pronation and supination was reached. Maximum pronation and supination was reached when either no more rotation could occur due to a misalignment of the radius and ulna or there was a collision of the bones. The simulation was repeated in increments of angulation of 2° up to 26°. The angulations that resulted in a combined range of motion 50° pronation and 80° supination less than 130° were recorded as unacceptable and the others were as acceptable. Findings: The study showed that radius angulation fracture of >16° in the proximal third of the radius would result in an unacceptable reduction of pronation-supination to less than 130°. Conclusion: Patients with more >16° of radius angulation in a distal third shaft fracture of the radius may result in clinical reduction in forearm rotation.

KEYWORDS

Forearm Fracture, Pronation-Supination, Paediatric Fractures

Cite this paper

Karuppiah, S. , Qureshi, S. and McNally, D. 2016 The Effect of Angulated Radius Fractures in Forearm Rotation: A Computer Based Model. Journal of Biomedical Science and Engineering, 9, 302-306. doi: 10.4236-jbise.2016.96024.





Author: Saravana Vail Karuppiah1*, Saaqib Qureshi2, Donal McNally2

Source: http://www.scirp.org/



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