THE EFFECT OF GREEN TEA EXTRACT AS A MATRIX METALLOPROTEINASE INHIBITOR ON THE BOND STRENGTH OF RESIN COMPOSITE | ||||
| Egyptian Dental Journal | ||||
| Article 42, Volume 64, Issue 3 - July (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), July 2018, Page 2807-2817 PDF (570.32 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2018.78470 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Maha A. El Baz; Kariem Aboulenien | ||||
| Lecturer in Conservative Dentistry Department, Faculty of Dentistry, Cairo University | ||||
| Abstract | ||||
| Objective: the aim of the study was to investigate the effect of epigallocatechin- 3-gallate (EGCG) from green tea extract as collagen cross linking agent on dentin bond durability at different aging times. Materials and Methods: thirty sound premolars were used, they were divided into two groups (15 each) according to the pretreatment protocol. Mid-coronal flate dentine surface was obtained. Group A had no pretreatment done, where bonding agent was placed as the manufacturer instructions. Group B had EGCG pre-adhesive conditioner rubbed before bonding procedures. Bonding procedure was followed by the application of nano-hybrid resin composite in tygon tubes for micro-shear bond strength measurement. Each group was further subdivided in to three subgroups according the aging protocol, where T1 specimens were stored for 24 hours, T2 they were stored for 6 months and T3 they were thermocycled. Results: All data was statistically analyzed, where group B showed statistically significant higher mean bond strength values (19.5 MPa) than group A (12.1MPa) regardless of the aging protocol. There was statistically significant change in micro-shear bond strength results due to aging regardless of the pretreatment. Where T1 revealed the highest mean values (17.1MPa) followed by T3 ( 15.5 MPa) and the lowest mean values were reported with group T2. There was a statistically significant decrease in mean micro-shear bond strength from T1 to T2 followed by non-statistically significant change in micro-shear bond strength from T2 to T3. The mean micro-shear bond strength at T3 showed statistically significantly lower value compared to T1 value. Conclusion: Green tea extracts (EGCG) is a powerful source of proanthocyanidin that has proved to be a good biological substitute as a cross-linker for preserving the integrity of dentin, enhancing the tooth resin composite inter-face when compared with universal adhesives present now a days in the market. Recommendation: More long term clinical and laboratory studies are needed to assess the durability of adhesives | ||||
| Keywords | ||||
| Green-tea extract; EGCG; Collagen cross linking agents; MMPs; Micro-shear bond strength | ||||
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