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Comparison of Shear Bond Strength of Dental Trauma Splints Fabricated Using Novel Adhesives: An In Vitro Study
İrem Bolat Öz1, Özlem Beren Satılmış1, Levent Özer1
1Department of Pediatric Dentistry, Ankara University, Ankara, Turkey.
Background/Aim:
Dental trauma splints are essential for stabilizing injured teeth and supporting periodontal healing. It is important for pediatric patients that the materials used in splint manufacture have low technique sensitivity and high bond strength. Due to the limited number of studies on newer adhesive materials that require fewer application steps, this study aimed to evaluate their bond strength in dental splinting applications.
Materials And Methods:
This in vitro study was conducted on 240 extracted bovine mandibular incisors. After cleaning and preparation, the teeth were paired and embedded in acrylic blocks, with their roots coated in silicone to simulate periodontal ligament mobility. Six groups (n = 20 pairs each) were formed according to the adhesive system used: G-aenial Anterior Composite (control), G-aenial Universal Flo, Single Bond Universal Adhesive, Ortho Connect Flow, G-Fix, and Fuji Ortho LC. Wire-composite splints were fabricated using 0.4 mm stainless steel wire, and the bonding procedures were carried out in accordance with the manufacturer's instructions. Shear bond strength was measured using a universal testing machine after 24 h of water storage at 37°C. Data were analyzed statistically using the Mann-Whitney U test and the Kruskal-Wallis H test at a significance level of 0.05. ROC analysis was performed to calculate a preliminary cut-off bond strength value.
Results:
The highest mean shear bond strength values were observed in the Ortho Connect Flow (8.49 MPa) and G-Fix (7.50 MPa) groups, which were significantly higher than those of the other materials tested (p < 0.05). The lowest values were observed in the Single Bond Universal (3.44 MPa) and Fuji Ortho LC (3.18 MPa) groups (p < 0.05). ROC analysis identified a cut-off value of 5.45 MPa for all groups and 6.91 MPa for the G-Fix group, both of which were above the minimum threshold values previously reported in the literature.
Conclusions:
G-Fix and Ortho Connect Flow demonstrated superior shear bond strength compared with conventional materials, indicating their potential as practical alternatives in wire-composite splint applications.
