An evaluation of shear bond strength of admira (Ormocer) as an alternative material for bonding orthodontic brackets: An in vitro study
Altaf Hussian Thekiya1, KR Aileni2, Madhukar Reddy Rachala3, Sathun Dharmender Reddy1, K Sena Devi4, Md. Yaser Ahmed Khan5
1 Reader, SVS Institute of Dental Sciences, Mahabubnagar, Telangana, India
2 Professor and Head, SVS Institute of Dental Sciences, Mahabubnagar, Telangana, India
3 Professor, Department of Orthodontics and Dentofacial Orthopedics, SVS Institute of Dental Sciences, Mahabubnagar, Telangana, India
4 Orthodontist and Dentofacial Orthopedics, Smiline Dental Hospitals, Madhapur, Hyderabad, India
5 Senior Lecturer and Dentofacial Orthopedics, SVS Institute of Dental Sciences, Mahabubnagar, Telangana, India
Dr. Altaf Hussian Thekiya
Department of Orthodontics, SVS Institute of Dental Sciences, Mahabubnagar, Telangana
Source of Support: None, Conflict of Interest: None
Objective: To evaluate shear bond strength (SBS) of Ormocer-bonded orthodontic brackets with self-etching primer (SEP) and conventional adhesive system and also to assess the amount of adhesive remaining on the tooth surface after debonding using adhesive remnant index (ARI).
Materials and Methods: The study was done on 90 extracted human upper first permanent maxillary premolars. The study sample was categorized into three groups of 30 each to assess the SBS using three adhesives, Ormocer, SEP, and conventional adhesive system. Following debonding, the surfaces of teeth were examined for residual adhesive remaining by means of the optical stereomicroscope at ×50 magnification. ARI (Artun and Bergland) was used to classify the amount of residual adhesive. Obtained data were expressed as mean ± standard deviation, and obtained data was expressed as mean ± standard deviation (SD) and statistical analysis was done using one way ANOVA and Mann-Whitney U-test [SPSS version 17 statistical package (SPSS Inc., Chicago, IL)].
Results: The mean SBS was maximum in Group I followed by Group II and Group III. The difference in the mean SBS among Group I (8.67 ± 1.84 Mpa), Group II (7.72 ± 1.82 MPa) and Group III (6.42 ± 1.55 MPa) was statistically significant. ARI was maximum in Group I followed by Group II and minimum Group III.
Conclusion: Ormocer may be utilized as a substitute to generally used bisphenol A-glycidyl methacrylate-based adhesives; however, its effectiveness should be determined clinically by in vivo studies.