CO2 LASER AND FLUORIDE; EFFECT ON ENAMEL REMINERALIZATION

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FEKRAZAD REZA; NAJAFI AHMAD; MAHFAR RAMONA; NAMDARI MAHSHID; AZARSINA MOHADESE

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Journal: JOURNAL OF LASERS IN MEDICAL SCIENCES Year:2018 | Volume:9 | Issue:SUPPL A (9TH WORLD CONGRESS OF SOLA) Page(s): 22-22

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Title

CO2 LASER AND FLUORIDE; EFFECT ON ENAMEL REMINERALIZATION

Author(s)

FEKRAZAD REZA | NAJAFI AHMAD | MAHFAR RAMONA | NAMDARI MAHSHID | AZARSINA MOHADESE

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Abstract

Background: Incipient enamel lesions are potentially able to remineralize. So, preventive modalities that rely on tooth remineralization are helpful in the conservation of the tooth structure. Fluoride, as a routine caries preventing agent, can only partially impart cariostatic properties. In the present study, the effect of CO2 laser alone or in combination with titanium tetrafluoride on enamel remineralization was investigated.Methods: The study was performed on human enamel specimens. After measuring the hardness of artificially demineralized samples with Vicker’s hardness tester, they were randomly divided into 5 study groups (n=15): G1: control; G2: APF 1.23% (positive control); G3: TiF4 4%; G4: TiF4 4% followed by CO2 laser; G5: CO2 laser followed by TiF4 4%. Laser parameters were as follows: 10.6 mm wavelength, 1 W peak power, 10 ms pulse duration, 500 ms repeat time, 0.2 mm beam spot size, 2 cm distance. After finishing the treatments, surface hardness was measured again. 3 samples in each study group were observed under scanning electron microscope ×1000. Data were analyzed by repeated measure ANOVA and Bonferroni tests. Level of significance was set at 0.05.Results: The control and Laser- TiF4 groups indicated significant differences with the other groups (P<0.05). The difference between control and Laser- TiF4 group was not significant (P=0.7). There was not a significant difference between APF and TiF4, APF and TiF4-Laser, and also between TiF4 and TiF4-Laser (P=1). According to the results, the effectiveness of TiF4 and TiF4-laser was similar to the positive control group (APF). TiF4 protects the tooth by forming a protective barrier of TiO2 against noxious agents (mechanical protection) and increasing the fluoride uptake into the enamel surface (chemical protection) by the high acidity of HF formed in the aqueous environment of the oral cavity.The results of the present study regarding the laser-TiF4 group were different from the results obtained by Poosti et al. The reason may be related to the shorter distance and smaller spot size of the laser in the present study, which have caused unfavorable mechanical alterations which could prevent caries remineralization. Some changes might have also occurred in the organic volume of enamel, which have changed the proper substrate for TiF functioning.Conclusion: APF, TiF4, and TiF4-Laser significantly increased the surface hardness of artificially demineralized enamel samples. Laser-TiF4 treatment could not increase the hardness of white-spot lesions.

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APA: Copy

FEKRAZAD, REZA, NAJAFI, AHMAD, MAHFAR, RAMONA, NAMDARI, MAHSHID, & AZARSINA, MOHADESE. (2018). CO2 LASER AND FLUORIDE; EFFECT ON ENAMEL REMINERALIZATION. JOURNAL OF LASERS IN MEDICAL SCIENCES, 9(SUPPL A (9TH WORLD CONGRESS OF SOLA)), 22-22. SID. https://sid.ir/paper/326095/en

Vancouver: Copy

FEKRAZAD REZA, NAJAFI AHMAD, MAHFAR RAMONA, NAMDARI MAHSHID, AZARSINA MOHADESE. CO2 LASER AND FLUORIDE; EFFECT ON ENAMEL REMINERALIZATION. JOURNAL OF LASERS IN MEDICAL SCIENCES[Internet]. 2018;9(SUPPL A (9TH WORLD CONGRESS OF SOLA)):22-22. Available from: https://sid.ir/paper/326095/en

IEEE: Copy

REZA FEKRAZAD, AHMAD NAJAFI, RAMONA MAHFAR, MAHSHID NAMDARI, and MOHADESE AZARSINA, “CO2 LASER AND FLUORIDE; EFFECT ON ENAMEL REMINERALIZATION,” JOURNAL OF LASERS IN MEDICAL SCIENCES, vol. 9, no. SUPPL A (9TH WORLD CONGRESS OF SOLA), pp. 22–22, 2018, [Online]. Available: https://sid.ir/paper/326095/en

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