| Autor: |
Christian VandeLune, Tutku Tazegul, Samuel J Ahrenholz, Caleb Iehl, Victoria Vivtcharenko, Eli Schmidt, Kevin N Dibbern, Hee Young Lee, Matthieu Lalevee, Nacime Salomão Barbachan Mansur, César de César Netto |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Journal of the Foot & Ankle, Vol 15, Iss 2 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2675-2980 |
| DOI: |
10.30795/jfootankle.2021.v15.1562 |
| Popis: |
Objective: To assess the degree of implant-related artifacts (IRA) around metallic and bio-integrative (BI) cannulated screws using Hounsfield units (HU) on computed tomography (CT). Our hypothesis was that BI implants would demonstrate significantly decreased IRA around the inserted screws. Methods: In this cadaveric CT imaging study, we used 2 below-knee specimens. Medial displacement calcaneal osteotomy was performed, and the specimens were fixed with either metallic or BI screws. HU values were measured over 4 different lines that crossed the osteotomy position. Results: The mean HU value was decreased in the BI implants compared to the metallic ones in 3 different positions: near the screw, directly over the screw, and inside the screw cannula. At the line placed 1 cm dorsal to the screw, the HU value for the metallic screw was lower than that for the BI screw. Conclusions: We found metallic implants to demonstrate significantly increased HU values in regions close to the implant and significantly decreased values 1 cm away from the implant, when compared to the BI screw. The decreased HU values 1 cm away from the implant could be due to a shielding effect of the surrounding bone, hindering the assessment of union and healing. BI implants represent an alternative to decrease these IRA effects. Level of Evidence III; Case-Control Study. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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