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Effects of different radiation doses on the microhardness, superficial morphology, and mineral components of human enamel
- Source :
- Archives of Oral Biology. 80:130-135
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Objective To evaluate the effects of three different radiotherapy doses (20, 40, and 70 Gy) on the microhardness, superficial morphology, and mineral content (based on Ca and P values) of three different depths of human enamel (cervical, middle, and occlusal). Design Thirty-four third molars were cut, separated, and prepared. Microhardness samples (n = 30) were embedded in acrylic resin and then polished, and depths were delimited. Microhardness tests were performed on cervical, middle, and occlusal enamel pre- and post-radiotherapy with a load of 50 g for 30 s. For the scanning electron microscopy (SEM) analysis (n = 4) and energy dispersive X-ray spectroscopy (EDS) (n = 12), samples were fixed in a 3% glutaraldehyde solution, washed in 0.1 M cacodylate solution, and dehydrated in crescent concentrations of ethanol. Microhardness data were tested for significant differences using a two-way analysis of variance (ANOVA) and Tukey’s test (p Results The results showed a decrease in microhardness values only in the cervical enamel, regardless of the radiation dose used; no morphological or mineral change was observed. Conclusion Radiotherapy can affect the microhardness values of only cervical enamel without compromising the morphological or mineral (Ca and P) content at any depth.
- Subjects :
- Molar
Materials science
Morphology (linguistics)
Surface Properties
Scanning electron microscope
Dentistry
In Vitro Techniques
Radiation Dosage
Indentation hardness
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
Humans
Hardness Tests
Dental Enamel
General Dentistry
Acrylic resin
Enamel paint
business.industry
Radiation dose
Spectrometry, X-Ray Emission
030206 dentistry
Cell Biology
General Medicine
Otorhinolaryngology
chemistry
030220 oncology & carcinogenesis
visual_art
Microscopy, Electron, Scanning
visual_art.visual_art_medium
Glutaraldehyde
business
Subjects
Details
- ISSN :
- 00039969
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Archives of Oral Biology
- Accession number :
- edsair.doi.dedup.....713536e4d030e335564ec04252216604