Abstract
Introduction
One of the most common treatments of head and neck cancer patients is radiotherapy, a treatment method which uses ionizing radiation beam and destroys tumor cells, minimizing damage to neighbor cells.
Purpose
To evaluate the bond strength of a conventional adhesive system in irradiated teeth.
Method
24 third human molars, 12 of which were randomly exposed to radiation and prepared from the removal of occlusal enamel, then exposed to a flat dentine surface. The adhesive system Stae was applied according to the manufacturer’s instructions. Next, two 2 mm increments of resin were implemented. The samples were hemi sectioned specimens, originating shapped toothpick. To evaluate the bond strength, a micro tensile test was done with 500N load and speed of 0.5 mm/minute.
Result
There was no statistically significant difference between the bond strength of teeth which were or were not exposed to radiation and which used a conventional adhesive system.
Conclusion
Although the radiation doses applied may cause some alterations in microscopic range in dental tissues, it can be concluded that these alterations do not influence in the bond strength in dentin of irradiated teeth.
Descriptors:
Adhesiveness; radiotherapy; composite resins; radiation