Author(s)

Yoav Shapinko¹, Iro Eleftheriadi¹, Tamar Brosh², Lihi Adler-Abramovich², Moshe Davidovitch¹, Tatiana Sella-Tunis¹, Rachel Sarig³, Nir Shpack¹

¹Department of Orthodontics, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
²Department of Oral Biology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
³Dan David Center for Human Evolution and Bio-History Research, Sackler Faculty of Medicine, The Steinhardt Museum of Natural History, Tel Aviv University, Tel Aviv, Israel.

Objectives: To investigate the efficacy of a new orthodontic bonding system that incorporates the primer solution in the adhesive. Materials and Methods: 90 anterior bovine teeth were divided in three groups: in Group I, brackets were bonded with Transbond XT system, in Group II with GC Ortho Connect which incorporates the primer in the adhesive, and in Group III, a single layer of primer was applied on the teeth before bonding the brackets with GC Ortho Connect. After a 24-hour latency period, Shear Bond Strength (SBS) and Adhesive Remnant Index (ARI) were measured. In cases with remnants left mainly on the bracket base, energy dispersive X-ray (EDX) spectrometry was performed in order to determine the presence of calcium particles. Selected cases were examined with Scanning Electron Microscopy (SEM) analysis and in nanometer scale with a confocal visible light microscope (μsurf revolver, NanoFocus AG, Germany). Results: The mean SBS values were 7.25 ± 0.58 MPa for Group I, 6.57 ± 0.50 MPa for Group II and 7.33 ± 0.56 MPa for Group III. These differences were not statistically significant (p = 0.562). ARI evaluation showed that the debonding failure happened more frequently within the adhesive interface in Group II, whereas this occurred more often at the tooth-adhesive interface in Group III. However, statistical analysis of the ARI scores showed no significant difference in adhesive remnants among the three groups (p = 0.078). Conclusion: The GC Ortho Connect bonding system can be efficiently used for orthodontic bonding. Adding a layer of primer appears to slightly increase the SBS while causing less adhesive to remain on enamel from which brackets were debonded.

Orthodontic Adhesive, Shear Bond Strength, Adhesive Remnant Index

Shapinko, Y. , Eleftheriadi, I. , Brosh, T. , Adler-Abramovich, L. , Davidovitch, M. , Sella-Tunis, T. , Sarig, R. and Shpack, N. (2018) Evaluation of an Orthodontic Adhesive with Combined Primer and Composite. Open Journal of Stomatology, 8, 205-216. doi: 10.4236/ojst.2018.86020.