In vitro evaluation of aligner attachment bond strength on enamel, composite, and lithium disilicate surfaces using different resin composites
BMC Oral Health, cilt.26, sa.1, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 26 Sayı: 1
- Basım Tarihi: 2026
- Doi Numarası: 10.1186/s12903-026-09255-w
- Dergi Adı: BMC Oral Health
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CINAHL, EMBASE, MEDLINE, Directory of Open Access Journals, Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest)
- Anahtar Kelimeler: Aligner attachment, Bonding, Composite restorations, Lithium disilicate glass-ceramic, Shear bond strength
- Hacettepe Üniversitesi Adresli: Evet
Özet
Background: The aim of this study was to evaluate the shear bond strength (SBS) of aligner attachments bonded to enamel, composite-restored, and lithium disilicate glass-ceramic surfaces using flowable and high-viscosity resin composites. Methods: Ninety extracted premolars were divided into three groups (n = 30) according to surface type: enamel (Group 1), composite resin restoration (Group 2), and lithium disilicate glass-ceramic (Group 3). Groups 1 and 2 were etched with 37% phosphoric acid, while Group 3 was etched with 9.6% hydrofluoric acid. A universal adhesive was applied to all specimens. Each group was divided into two subgroups based on composite type (flowable or high-viscosity universal; n = 15). SBS and adhesive remnant index (ARI) were evaluated. One-way ANOVA, Student’s t-test, and Fisher Freeman Halton test were used for statistical analyses (p < 0.05). Results: The highest SBS were obtained in Group 1 bonded with high-viscosity universal composite attachments (mean (± SD), 19.6 (± 6.7 MPa)), and the lowest were obtained in Group 2 bonded with flowable composite attachments (mean (± SD), 7.3 (± 1.8 MPa)). Comparison of three groups within themselves according to the composite resin factor, the mean SBS of Group 2 for high-viscosity universal resin was higher than for flowable resin (p < 0.001). ARI scores did not show a significant correlation with either tooth surface or composite resin type. Conclusions: High-viscosity resin composite provides more reliable bond strength than flowable composite when bonding aligner attachments to composite-restored surfaces. Both composite types demonstrated clinically acceptable bond strength on enamel and lithium disilicate surfaces.