| Autor: |
Major, Joshua W., Ernst, Andrew J., Kallevang, Jonathan K., Kaeck, Alexander, Grijalva, Stephen D., Douglas, Thomas J., Wilson, Andrew W., Garry, Conor B. |
| Předmět: |
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| Zdroj: |
Skeletal Radiology; Dec2023, Vol. 52 Issue 12, p2461-2467, 7p |
| Abstrakt: |
Objective: We hypothesize that cut screws will deform in a manner that increases the core and outer diameters of the screw hole compared to uncut controls, and effects will be more pronounced in titanium screws. Materials and methods: We used biomechanical polyurethane foam blocks to simulate cortical bone. We organized four groups of stainless steel and titanium cut and uncut screws. Blocks were fitted with a jig to ensure perpendicular screw insertion. We imaged the blocks using digital mammography and measured them using PACS software. Power analysis determined a power of 0.95 and an alpha error of 0.05. Results: Highly statistically significant differences in core diameter were found after cutting stainless steel and titanium screws. Cutting stainless steel screws increased core diameter by 0.30 mm (95% CI, 0.16 to 0.45; p <.001). Titanium screws' core diameter increased by 0.45 mm (95% CI, 0.30 to 0.61; p <.001). No significant differences were found in the outer diameters of stainless steel and titanium screws after cutting. Conclusion: Titanium and stainless steel screw tracts demonstrated screw core diameter and screw thread pattern deformation after cutting. Titanium screws demonstrated more significant effects. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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