Influence of Different Surface Modifications on the Reverse Torque Values of Abutment Screws: An In Vitro Study

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dc.authorid0000-0002-2744-3069
dc.authorid0000-0003-4802-1604
dc.authorid0000-0001-5273-7774
dc.authorid0009-0002-6610-7399
dc.contributor.authorDede, Merve
dc.contributor.authorÖzyılmaz, Özgün Yusuf
dc.contributor.authorDoğanay Özyılmaz, Özge
dc.contributor.authorHancı Abay, Gamze
dc.date.accessioned2026-10-07T12:23:14Z
dc.date.available2026-10-07T12:23:14Z
dc.date.issued2026
dc.departmentFakülteler, Diş Hekimliği Fakültesi, Klinik Bilimler Bölümü
dc.description.abstractEvidence regarding tantalum nitride (TaN)-coated gold abutment screws is lacking, and studies on diamond-like carbon (DLC)-coated and anaerobic adhesive-coated abutment screws remain limited. This study evaluated the reverse torque values (RTVs) of abutment screws with different surface modifications. Sixty abutment screws from the same implant system were divided into five groups (n = 12): gold, TaN-coated gold, titanium, DLC-coated titanium, and anaerobic adhesive-coated titanium. Abutments were tightened according to the manufacturer’s recommended torque. Specimens were then subjected to cyclic loading (50 N, 1 Hz, 480,000 cycles) in a dual-axis chewing simulator, after which RTVs were evaluated. ANOVA showed a significant difference only for the uncoated gold screw group (p < 0.05). The lowest RTVs were observed in the gold screws. Although the differences among the modified screw groups were not statistically significant, surface-treated screws demonstrated higher and more stable RTVs than their uncoated counterparts. TaN-, DLC-, and anaerobic adhesive-treated screws exhibited higher RTVs following cyclic loading, suggesting that these surface modifications may enhance screw stability and reduce the risk of abutment screw loosening.
dc.identifier.citationDede, M., Ozyilmaz, O. Y., Doganay Ozyilmaz, O., & Hanci Abay, G. (2026). Influence of different surface modifications on the reverse torque values of abutment screws: An in vitro study. Journal of Functional Biomaterials, 17(9), 475.
dc.identifier.doi10.3390/jfb17090475
dc.identifier.endpage14
dc.identifier.issn20794983
dc.identifier.issue9
dc.identifier.pmid42783721
dc.identifier.scopus2-s2.0-105051505669
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/20.500.12941/466
dc.identifier.volume17
dc.indekslendigikaynakPubMed
dc.indekslendigikaynakScopus
dc.institutionauthorDede, Merve
dc.institutionauthorÖzyılmaz, Özgün Yusuf
dc.institutionauthorid0000-0002-2744-3069
dc.institutionauthorid0000-0003-4802-1604
dc.language.isoen
dc.relation.ispartofJournal of Functional Biomaterials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectImplant
dc.subjectAbutment Screw
dc.subjectTorque
dc.subjectReverse Torque
dc.subjectAbutment Screw Surface
dc.titleInfluence of Different Surface Modifications on the Reverse Torque Values of Abutment Screws: An In Vitro Study
dc.typeArticle

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