Storm water drainage is meant to carry storm water (rain water) and any other clean surface water. It is fundamentally not suitable or designed for carrying sewage or industrial waste water or even septic tank effluent. Even the effluent from the sewage treatment plant cannot be discharged into it. Therefore, one of the urgent tasks should be to make plans for diversion of all waste water (both domestic and industrial) from surface drains.
Context:
The resin–dentin interface is less durable, which reduces the longevity of tooth-colored restorations. To encounter this shortcoming, the use of nanotechnology to mimic biomineralization proves beneficial.
Aims:
This study was conducted to evaluate the effect of remineralization with strontium-doped nanohydroxyapatite (Sr-nHAp) with chitosan on shear bond strength of resin composite to dentin.
Materials and Methods:
Sixty five extracted human premolars were divided into five groups (
n
= 13) based on remineralization protocol as: Group A – 20% (Sr-nHAp) with chitosan, Group B – 10% (Sr-nHAp) with chitosan, Group C – 20% (Sr-nHAp) with simulated body fluid, Group D – 10% (Sr-nHAp) with simulated body fluid, and Group E – control. Following bonding, resin composite of specified dimension was built and was subjected to shear bond strength test after 24 h and 1 week using Universal Testing Machine, and mode of failure was assessed. ANOVA and paired sample
t
-test were used for analyzing the data, and the level of significance was set at 5%.
Results:
The highest value of shear bond strength was obtained from Group A after aging for a week, and there is a significant increase in the value of all the groups as compared to the control group after 1 week of storage than 24 h.
Conclusions:
Remineralization with Sr-nHAp and chitosan has positively improved the bond strength of resin to dentin at the end of 1 week.
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