MICROLEAKAGE PATTERN AT TOOTH-ADHESIVE INTERFACE UNDER METAL-BRACKETS BONDED WITH CONVENTIONAL OR FLOWABLE NANO-ADHESIVE SYSTEMS | ||||
| Egyptian Dental Journal | ||||
| Article 13, Volume 63, Issue 1 - January (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), January 2017, Page 815-821 PDF (668.84 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2017.75031 | ||||
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| Authors | ||||
| Rania El-Saady Badawy1; Nabil El-Desouky Abou-Shamaa2; Walid Shaaban Elsayed3 | ||||
| 1Lecturer, Dental Materials, Suez-Canal University, Ismailia, Egypt | ||||
| 2Associate Professor, Department of Orthodontics, Suez-Canal University, Ismailia, Egypt | ||||
| 3Lecturer, Oral Biology, Suez-Canal University, Ismailia, Egypt | ||||
| Abstract | ||||
| Objective: This in vitro study aimed to assess the microleakage at the tooth-adhesive interface underneath metal-brackets, either bonded with a conventional or a nano-adhesive system. Materials and Methods: Dye penetration method was used to evaluate microleakage at the enamel-bracket interface. Twenty freshly-extracted human maxillary and mandibular premolars (average age: 15.47 ± 2.18 years) were randomly divided into two groups (n = 10/group/type of bonding composite). Group 1: metal-brackets bonded with conventional light-cured Transbond XT (3M-Unitek); Group 2: metal-brackets bonded with the light-cured flowable nano-hybrid composite Grandio SO Flow (Voco-Germany) used in combination with a one-step self-etch dual-cured adhesive, Futurabond DC (Voco-Germany). Specimens were thermocycled, immersed in Fuchsin dye, sectioned longitudinally, and evaluated for microleakage. Microleakage was recorded at the adhesive-enamel interface on both occlusal and gingival margins. Statistical analysis was performed using t-test as well as the paired t-tests. Results: Both groups demonstrated microleakage at the adhesive-enamel interface, yet the metal-brackets bonded with the nano-composite Grandio SO Flow (G2) exhibited significantly higher microleakage values at the adhesive-enamel interface compared to brackets bonded with the conventional composite material (p < 0.05). Conclusions: Flowable nano-composites may still not be the adhesive of choice for bracket bonding due to their remarkable microleakage at the enamel-adhesive interface in comparison to conventional light-cured Transbond XT (3M-Unitek). | ||||
| Keywords | ||||
| Metal-bracket; Nano composite; Conventional composite; Microleakage; Fuchsin stain | ||||
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