Effect of 2% Chlorhexidine on Microtensile Bond Strength of Self Etch Adhesive to Sound and Demineralized Dentin Singh Sneha1,*, Nikhil Vineeta2, Jaiswal Shikha3, Sharma Jyoti4 1Post graduate of Conservative Dentistry and Endodontics, Subharti Dental College 2Head of Department of Conservative Dentistry and Endodontics, Subharti Dental College 3Professor, Department of Conservative Dentistry and Endodontics, Subharti Dental College 4Post graduate of Oral Medicine and Radiology, Subharti Dental College *Corresponding author: Sneha Singh, Post graduate of Conservative dentistry and endodontics, Subharti Dental College, Sharda Nagar, Saharanpur, Snehasingh.662@gmail.com
Online published on 6 April, 2019. Abstract Aim To evaluate the effect of chlorhexidine on bond strength of self etch adhesive with sound and demineralized dentin. Materials and Method 40 freshly extracted human permanent maxillary and mandibular molars were selected as specimens. The specimens are sectioned at a level of 1.5mm from occlusal surface to expose dentin and were polished. They were further divided mesio-distally into two equal halves and each half was randomly assigned to control (GROUP C (n=40)) and experimental group(GROUP E (n=40)). The specimens were equally divided into two halves buccolingually, which were randomly assigned to two subgroups(n=40) which were treated with distilled water (Group CD, Group ED) and with chlorhexidine (Group CC and Group EC). Each sub-group was further divided equally into 4 groups(n=10) on the basis of time interval i.e. immediate, at 6 months, 12 months, and 18 months. The samples were then coated with XenoV+ self etch adhesive system and a 2mm thick composite and mounted in acrylic moulds. Thereafter, microtensile bond strength testing was done at an interval of 1 week, 6 months, 12 months and 18 months. Results so obtained were subjected to statistical analysis by one way ANOVA and post-hoc test. Results At all time intervals, Group CD showed significantly higher bond strength of self-etch adhesive as compared to ED (P<0.001), Aging was found to decrease microtensile bond strength values in all the groups, CHX had no significant effect on groups CCI and ECI(P>0.001). However, 2% CHX was found to relatively preserve the bond strength of self-etch adhesive in both sound and demineralized dentin in groups CC6, CC12, CC18 and EC6, EC12, EC18. Conclusion 2% CHX preserves bond strength of self-etch adhesive to dentin at 6, 12 and 18 months, however it has no effect on immediate microtensile bond strength Top Keywords Demineralized dentin, Microtensile bond strength, Self etch adhesive, Sound dentin. Top |