Predrag Grubor1, Milan Grubor. 1. Department for Orthopaedic and Trauma Surgery, Banja Luka, Bosnia and Herzegovina. predraggrubor@gmail.com
Abstract
INTRODUCTION: Extra-focal or external fixation is the method of fracture fixation through the healthy part of the bone using pins or wires. OBJECTIVE: The aim was to determine which external splints (Ortofix, Mitković, Charnley and Ilizarov) had the best biomechanical properties in primary stabilization of spiral, transverse and commutative bone fractures. METHODS: To determine the investigation methodology of biomechanical characteristics of the external fixator we used mathematical and computer simulator (software), juvidur physical model and clinical examination. RESULTS: Values of advancing fragments in millimetres obtained by the study of mathematical and computer simulator (software): Charnley--0.080 mm, Mitković M 20--0.785 mm, Ilizarov--2.245 mm and Ortofix--1.400 mm. In testing thejuvidur model the following values were obtained: the external fixator Mitković M20--1.380 mm, Ortofix--1.470 mm, Ilizarov--2.410 mm, and Charnley--2.510 mm. Clinical research of biomechanical characteristics of the effect of vertical force yielded the following results: Mitković M20--0.89 mm, Ortofix--0.14 mm, Charnley--0.80 mm and Ilizarov--1.23 mm. CONCLUSION: When determining the total number of the stability test splints under the effect of vertical force (compression) and force effect in antero-posterior, later-lateral plane of cross, spiral and comminuted long bone fractures, the best unified biomechanical stability was shown bythe following external fixators: firstly, Mitković M20 (0.93mm), secondly, Charnley fixator (1.14 mm), thirdly, Ortofix (1.22 mm), and fourthly, Ilizarov (1.60 mm).
INTRODUCTION: Extra-focal or external fixation is the method of fracture fixation through the healthy part of the bone using pins or wires. OBJECTIVE: The aim was to determine which external splints (Ortofix, Mitković, Charnley and Ilizarov) had the best biomechanical properties in primary stabilization of spiral, transverse and commutative bone fractures. METHODS: To determine the investigation methodology of biomechanical characteristics of the external fixator we used mathematical and computer simulator (software), juvidur physical model and clinical examination. RESULTS: Values of advancing fragments in millimetres obtained by the study of mathematical and computer simulator (software): Charnley--0.080 mm, Mitković M 20--0.785 mm, Ilizarov--2.245 mm and Ortofix--1.400 mm. In testing thejuvidur model the following values were obtained: the external fixator Mitković M20--1.380 mm, Ortofix--1.470 mm, Ilizarov--2.410 mm, and Charnley--2.510 mm. Clinical research of biomechanical characteristics of the effect of vertical force yielded the following results: Mitković M20--0.89 mm, Ortofix--0.14 mm, Charnley--0.80 mm and Ilizarov--1.23 mm. CONCLUSION: When determining the total number of the stability test splints under the effect of vertical force (compression) and force effect in antero-posterior, later-lateral plane of cross, spiral and comminuted long bone fractures, the best unified biomechanical stability was shown bythe following external fixators: firstly, Mitković M20 (0.93mm), secondly, Charnley fixator (1.14 mm), thirdly, Ortofix (1.22 mm), and fourthly, Ilizarov (1.60 mm).
Authors: Predrag Grubor; Milorad Mitković; Milan Grubor; Milan Mitković; Luigi Meccariello; Gabriele Falzarano Journal: Acta Inform Med Date: 2016-07-16