Evaluation of spinal instrumentation rod bending characteristics for In-Situ contouring
Noshchenko, A; Yao Xianfeng; Armour, GA; Baldini, T; Patel, VV; Ayers, R; Burger, E
| HERO ID | 1772706 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | Evaluation of spinal instrumentation rod bending characteristics for In-Situ contouring |
| Authors | Noshchenko, A; Yao Xianfeng; Armour, GA; Baldini, T; Patel, VV; Ayers, R; Burger, E |
| Journal | Journal of Biomedical Materials Research. Part B: Applied Biomaterials |
| Volume | 98B |
| Issue | 1 |
| Page Numbers | 192-200 |
| Abstract | Bending characteristics were studied in rods used for spinal instrumentation at in-situ contouring conditions. Five groups of five 6 mm diameter rods made from: cobalt alloy (VITALLIUM), titanium-aluminum-vanadium alloy (SDI (TM)), beta-titanium alloy (TNTZ), cold worked stainless steel (STIFF), and annealed stainless steel (MALLEABLE) were studied. The bending procedure was similar to that typically applied for in-situ contouring in the operating room and included two bending cycles: first-bending to 21-24 degrees under load with further release of loading for 10 min, and second-bending to 34-37 degrees at the previously bent site and release of load for 10 min. Applied load, bending stiffness, and springback effect were studied. Statistical evaluation included ANOVA, correlation and regression analysis. TNTZ and SDI (TM) rods showed the highest (p < 0.05) springback at both bending cycles. VITALLIUM and STIFF rods showed mild springback (p < 0.05). The least (p < 0.05) springback was observed in the MALLEABLE rods. Springback significantly correlated with the bend angle under load (p < 0.001). To reach the necessary bend angle after unloading, over bending should be 37-40% of the required angle in TNTZ and SDI (TM) rods, 27-30% in VITALLIUM and STIFF rods, and around 20% in MALLEABLE rods. (c) 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 98B: 192-200, 2011. |
| Doi | 10.1002/jbm.b.31837 |
| Pmid | 21563305 |
| Wosid | WOS:000291598900020 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000291598900020 |
| Is Public | Yes |
| Language Text | English |
| Keyword | biomaterials; springback; rods; spinal instrumentation |