Academic Journal
Reverse Torque Value of Angulated Screw Channel Abutment before and after Cyclic Loading: An In Vitro Study
| العنوان: | Reverse Torque Value of Angulated Screw Channel Abutment before and after Cyclic Loading: An In Vitro Study |
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| المؤلفون: | Yu-Hsuan Chen, Yu-Ling Wu, Hung-Shyong Chen, Ching-Ping Lin, Aaron Yu-Jen Wu |
| المصدر: | Journal of Functional Biomaterials, Vol 14, Iss 3, p 124 (2023) |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Biotechnology LCC:Medicine (General) |
| مصطلحات موضوعية: | implant, angulated screw-retained crown, angulated screw channel, reverse torque value, cyclic loading, mechanical stresses, Biotechnology, TP248.13-248.65, Medicine (General), R5-920 |
| الوصف: | This in vitro experiment aimed to understand the difference in preload acting on an abutment screw under different angles of angulated screw-retained crown and the performance after cyclic loading. In total, thirty implants with angulated screw channel (ASC) abutments were divided into two parts. The first part consisted of three groups: a 0° access channel with a zirconia crown (ASC-0) (n = 5), a 15° access channel with a specially designed zirconia crown (sASC-15) (n = 5), and a 25° access channel with a specially designed zirconia crown (sASC-25) (n = 5). The reverse torque value (RTV) was measured at 0° for each specimen. The second part consisted of three groups: a 0° access channel with a zirconia crown (ASC-0) (n = 5); a 15° access channel with a zirconia crown (ASC-15) (n = 5), and a 25° access channel with a zirconia crown (ASC-25) (n = 5). The manufacturer’s recommended torque was applied to each specimen, and baseline RTV was measured before cyclic loading. Each ASC implant assembly was cyclically loaded at 0 to 40 N with 1 million cycles at 10 Hz. RTV was measured after cyclic loading. Kruskal–Wallis test and Jonckheere–Terpstra test were used for statistical analysis. All specimens were examined under a digital microscope and scanning electron microscope (SEM) to observe the wear of the screw head before and after the whole experiment. A significant difference in the different percentages of straight RTV (sRTV) between the three groups was found (p = 0.027). The angle of ASC to the different percentages of sRTV showed a significant linear trend (p = 0.003). No significant differences were found in RTV difference after cyclic loading among the ASC-0, ASC-15, and ASC-25 groups (p = 0.212). The ASC-25 group had the most serious degree of wear based on a digital microscope and SEM examination. The ASC angle will affect the actual preload acting on a screw: the larger the ASC angle, the smaller the preload. The performance of the angled ASC groups in RTV difference was comparable to that of 0° ASC after cyclic loading. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2079-4983 |
| Relation: | https://www.mdpi.com/2079-4983/14/3/124; https://doaj.org/toc/2079-4983 |
| DOI: | 10.3390/jfb14030124 |
| URL الوصول: | https://doaj.org/article/987c267b59b34d56a70e9fdfcc6580a0 |
| رقم الانضمام: | edsdoj.987c267b59b34d56a70e9fdfcc6580a0 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20794983 |
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| DOI: | 10.3390/jfb14030124 |