Naser Asl Aminabadi
1, Ebrahim Najafpour
2, Leila Erfanparast
2, Mohammad Samiei
3, Monireh Haghifar
4, Alireza Sighary Deljavan
5*, Zahra Jamali
6, Fatemeh Pournaghi Azar
7, Marzieh Shokravi
41 Professor, Department of Pediatric Dentistry, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
2 Assistant Professor, Department of Paediatric Dentistry, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
3 Assistant Professor, Department of Endodontic, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
4 Post-graduate Student, Department of Paediatric Dentistry, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
5 Research Assistant, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
6 Assistant Professor, Department of Oral Science, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
7 Assistant Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
Abstract
Background and aims. Anterior esthetic restoration is challenging in pediatric dentistry, due to limited durability and poor retention of the restoration.This study assessed the effect of air abrasion on tensile failure load of composite class III restorations using different preparation techniques. Materials and methods. 100 extracted human anterior primary teeth were divided, based on the preparation methods, into four groups each consisting of 25 subjects : conventional (A), labial surface bevel (B), conventional + air abrasion (C), and labial surface bevel + air abrasion (D). After restoring cavities, tensile failure load of samples was measured in Newton by Universal testing machine at a crosshead speed of 1 mm per minute. The data were analyzed by Kruskal-Wallis and Mann Whitney U tests using SPSS software. Results. There were statistically significant differences between groups A and C (P = 0.003), groups A and B (P < 0.001), groups A and D (P < 0.001), groups B and C (P = 0.028), groups B and D (P = 0.027), and also groups C and D (P< 0.001). Group D demonstrated the highest mean tensile failure load. Conclusion. Labial surface bevel treated by air abrasion showed significantly more retention of composite restoration.