1Postgraduate Student Department of Prosthodontics, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore
3Associate Professor, Department of Prosthodontics, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore
4Associate Professor, Department of Dental Materials, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore
5Professor & Head, Department of Oral Pathology, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore
6Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore
7Professor & HOD, Department of Prosthodontics, AJ Institute of Dental Sciences, Kuntikana, Mangalore, India
*Corresponding Author: Dr. Shobha J Rodrigues Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore Manipal Academy of Higher Education (MAHE), Email: shobha.j@manipal.edu
Online published on 25 September, 2018.
To evaluate the effect of eugenol containing provisional luting agents on tensile bond strength and failure mode of self-adhesive resin cement system at different time intervals.
Sixty freshly extracted premolars having standardized mesiodistal width of 3mm, buccolingual dimension of 6mm and height of 3mm were randomly divided into 4 experimental groups (n=15) according to the exposure time to eugenol; no exposure-CG, 24hour(h) exposure-1G, 7days-7G and 14days-14G. Provisional crowns (DPI-self cure Tooth molding Powder) were fabricated for all specimens except the control group(CG), cemented using eugenol containing temporary cement (Kalzinol; DPI)and stored in a water bath for the allocated time period. Permanent crown were fabricated with NiCr alloy (Wirolloy) and cemented with Self-Adhesive Resin Cement (RelyX U200). Universal testing machine (2mm/min) was used to determine the tensile load testing. The mode of fracture was analyzed at a magnification of 10 X using stereomicroscope. The results were analyzed with 1-way ANOvA (a=.05) followed by a Tukey B post hoc test.
Macrotensile bond strength for CG (5.61 Mpa ± 0.83) was significantly higher than 1G (3.03 Mpa±0.87) (p<.001).There was no significant difference between 7G (4.29 Mpa±0.69) and 14G (4.95 Mpa±0.75). The significant mode was adhesive failure for 1G (78.6%), other specimens demonstrated predominantly a mixed failure.
The tensile bond strength is significantly reduced if the permanent cementation is carried out within 24 h of provisional cementation of eugenol containing temporary cement.
Bond strength, provisional, macrotensile
