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Updated: Oct 4, 2025
An In Vitro Approach to Photodynamic Therapy
Published on: August 17, 2018
Effect of photodynamic therapy on resin-dentin bonding interface using different illumination times
Meng Zhang1, Jia Guo1, Xi Chen1
1Department of Stomotology, First Hospital Affiliated to Zhengzhou University, Zhengzhou University, Zhengzhou 450052,China.
Objectives:
The aim of the present study was to evaluate the effect of photodynamic therapy(PDT) on the resin-dentin bonding interface using different illumination time.
Methods:
Seventy completed, isolated molar teeth were collected for this study, sixty of them were used in microtensile bond strength tests. These teeth were initially divided randomly in two main groups(n= 30) by the random number table method upon the type of using illumination or not, respectively. Then these groups followed by dividing each category in five subgroups(n = 6): group A, group B1,group B2, group B3, group B4, group a, group b1, group b2, group b3, group b4. After different treatment, the remaining teeth were made specimens which were observed the fracture modes and interfaces under a stereomicroscope and a scanning electron microscope(SEM). The dentin permeability of the specimens were evaluated by a confocal laser scanning microscopy(CLSM). To detect significance difference between means of different groups analysis of variance(ANOVA) was performed followed by LSD-t tests.
Results:
There was a significant statistical difference in the microtensile bond strength of the different illumination time of PDT between four experimental groups and the control (P < 0.05).
Conclusion:
With the increase of the illumination time in PDT, the bonding strength between resin and dentin decreased gradually.
