Abstract
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.
Highlights
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
Osteoradionecrosis, xerostomia, salivary gland hypo function, oropharyngeal candidiasis, periodontal diseases, dental caries, and trismus are founded in patients both during and after radiation
Some of them are preventable, which represents the importance of the patients awareness of the prevention and management of radiotherapy-related oral complications[4]
Summary
Once the survival rate of head and neck patients is increasing daily, the approach of a dentist becomes primordial to identify, to understand, and to manage possible alterations and late complications originated from the cancer therapy[1,2]. 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. This type of treatment, in specific cases, is applied singly or in combination to others therapeutic methods[3]. The null hypothesis tested is that irradiation does not intervene in the bond strength in dentin
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