Advances in Clinical and Experimental Medicine
2020, vol. 29, nr 4, April, p. 459–468
Publication type: original article
License: Creative Commons Attribution 3.0 Unported (CC BY 3.0)
Comparative biomechanical testing of customized three-dimensional printing acetabular-wing plates for complex acetabular fractures
1 The Third Affiliated Hospital, Southern Medical University, Guangzhou, China
2 UniSA Clinical & Health Sciences, UniSA Cancer Research Institute, University of South Australia, Adelaide, Australia
Background. Three-dimensional (3D) printing of an acetabular wing-plate is a new minimally invasive surgical technique for complex acetabular fractures.
Objectives. To investigate the biomechanical stability of 3D printing acetabular wing-plates. The results were compared with 2 conventional fixation systems.
Material and Methods. Eighteen fresh frozen cadaveric pelvises with both column fractures were randomly divided to 3 groups: A – iliosciatic plates fixation system; B – 3D printing plates; C – 2 parallel reconstruction plates fixation system. These constructions were loaded onto a biomechanical testing machine. Longitudinal displacement and stiffness values of the constructs were measured to estimate their stability.
Results. When the load force reached 700 N, Group A was superior to Group B in the longitudinal displacement of point 1 (p > 0.05). The longitudinal displacement of point 2 showed no significant differences among Groups A, B and C, and the displacement of the fracture line over point 3 showed no significant differences between Groups A and B (p > 0.05). The axial stiffness of Groups A, B and C were 122.4800 ±8.8480 N/mm, 168.4830 ±14.8091 N/mm and 83.1300 ±3.8091 N/mm, respectively. Group B was significantly stiffer than A and C (p < 0.05). Loads at failure of internal fixation were 1378.83 ±34.383 N, 1516.83 ±30.896 N and 1351.00 ±26.046 N for Groups A, B and C, respectively. Group B was significantly superior to Groups A and C (p > 0.05).
Conclusion. Customized 3D printing acetabular-wing plates provide stability for acetabular fractures compared to intraspecific buttressing fixation.
internal fixation, three-dimensional printing, acetabular fracture, biomechanical tests
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