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Abstract

ANNEALING EFFECT OF IRRADIATED TOOTH USING SURFACE MICRO HARDNESS TESTIN1G- AN INVITRO STUDY.

Mithra N Hegde*, Nidarsh D Hegde, Suchetha Kumari N, Ganesh Sanjeev, Priya

ABSTRACT

Background: Dental complications is the common problem faced all over the world. Subjects with poor oral hygiene and patients undergoing radiotherapy for oral cancers are developing signs of decalcification of enamel, lesions and Caries. Hence a well-designed treatment is essential to protect the teeth among the patient population. Objective: To determine the annealing effect of radiated tooth by testing maximum micro hardness of the teeth before and after 30 days of radiation. Methodology: In our study, we collected 30 intact caries free human molar teeth and were sectioned mesio-distally. The sectioned teeth were divided into 3 groups as control, ACP CCP Coated teeth and ACP CCPF coated teeth. All the samples were maintained in artificial saliva before and after radiation to sustain oral environment. Samples were subjected to Radiation dosage of 70Gy and the microhardness profile was assessed before, after and after 30 days of radiation treatment. The results obtained were statistically analysed by performing bonferroni adjustment for pairwise comparisons and one way ANOVA for multiple comparison test at P<0.05 level of significance. Results: The microhardness test values defined that radiation had induced demineralisation which ensued the decrease in overall enamel hardness. It was also observed that teeth had acquired remineralising ability when tested for hardness after 30 days incubation period supplemented with artificial saliva from the day of radiation treatment. Likewise, the teeth coated with ACP CCPF had the best outcome in comparison to the other groups and the results obtained were statistically significant. Conclusion: Teeth samples subjected to radiation undergo annealing (remineralisation) when maintained under oral hygienic environment over a period of time. Topical applications of fluoride has shown better remineralization efficacy.

Keywords: Annealing effect, Hardness test, Remineralisation, Radiation therapy.


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