scholarly journals Effect of high-fluoride dentifrice and bracket bonding composite material on enamel demineralization adjacent to orthodontic brackets in vitro

2021 ◽  
pp. e493-e498
Author(s):  
P. Silva-Fialho ◽  
R. Ferreira ◽  
J. Leal ◽  
C. Tabchoury ◽  
G. Vale
2020 ◽  
Vol 24 (9) ◽  
pp. 3105-3112 ◽  
Author(s):  
Robson S. Ferreira ◽  
Antonio Pedro Ricomini-Filho ◽  
Cínthia P. Tabchoury ◽  
Glauber Campos Vale

2009 ◽  
Vol 03 (02) ◽  
pp. 127-134 ◽  
Author(s):  
Tancan Uysal ◽  
Mihri Amasyali ◽  
Alp Erdin Koyuturk ◽  
Deniz Sagdic

ABSTRACTObjectives: The aim of this in vitro study was to compare the efficacy of Amorphous Calcium Phosphate (ACP)-containing orthodontic composite and resin-modified glass ionomer cement (RMGIC) on enamel demineralization adjacent to orthodontic brackets evaluated by a new laser fluorescence device.Methods: Sixty extracted maxillary premolars were used in the present study. Twenty orthodontic brackets were bonded with ACP-containing orthodontic adhesive (Aegis-Ortho), 20 were bonded with RMGIC (Fuji Ortho LC) ad20 were bonded with Transbond XT composite as the control. All samples were then cycled for 21 days through a daily procedure of demineralization for 6 hours and remineralization for 17 hours. After this procedure, demineralization evaluations were undertaken by a pen-type laser fluorescence device (DIAGNO-dent Pen). Analysis ofvariance (ANOVA) and Tukey test was used for statistical evaluation, at P<.05 level.Results: According to ANOVA, significant demineralization variations (ΔD) were determined among groups (F=6.650; P<.01). The ACP-containing composite showed the lowest (mean: 8.98±2.38) and the control composite showed the highest (mean:12.15±3.83) ΔD, during 21 days demineralization process (P<.01). Significant difference was also observed between the ΔD scores of the RMGIC (mean: 9.24±2.73) and control (P<.05).No significant differences was found in preventive effects of ACP-containing composite and RMGIC (P<.05) against demineralization.Conclusions: The use of both ACP-containing orthodontic composite and RMGIC should be recommended for any at-risk orthodontic patient to provide preventive actions and potentially remineralize subclinical enamel demineralization. (Eur J Dent 2009;3:127-134)


2020 ◽  
Vol 21 (6) ◽  
pp. 621-625
Author(s):  
George Sam ◽  
Ateet Kakti ◽  
Hosam Ali Baeshen ◽  
Dharmesh H Shivananda ◽  
Waseem Ansar ◽  
...  

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Feyza Ulkur ◽  
Elif Sungurtekin Ekçi ◽  
Didem Nalbantgil ◽  
Nuket Sandalli

The aim of thisin vitrowas to evaluate the effects of tricalcium phosphate (TCP) and amorphous calcium phosphate (ACP) containing varnish materials and Er:YAG laser irradiation on enamel demineralization around orthodontic brackets. Forty extracted human premolar teeth were randomly divided into four treatment groups (i.e., 10 in each group): (1) 5% NaF-ACP varnish, (2) 5% NaF-TCP varnish, (3) Er:YAG laser, and (4) control (no treatment). Er:YAG laser was operated at a wavelength of 2.94 μm and the energy output was 80 mJ per pulse; a pulse duration of 200 μsec and and a frequency of 2 Hz were used with water cooling. All samples were then put into pH cycles. Surface microhardness values and representative SEM images were assessed. Surface microhardness values were evaluated using Kruskal-Wallis and Mann-WhitneyUtests. The results revealed that demineralization was significantly lower in the TCP and ACP varnish groups, whereas mean surface microhardness values of the TCP varnish were found higher than the ACP(P<0.05). TCP and ACP varnish materials were found effective for reducing enamel demineralization around orthodontic brackets. Use of Er:YAG laser irradiation as described in this study for inhibition of demineralization was found not satisfactory.


2020 ◽  
Vol 77 ◽  
pp. 1
Author(s):  
Tatiana Belluccio dos Santos Vidinha ◽  
Andréa Lanzillotti Cardoso ◽  
Celso Da Silva Queiróz

Objetivo: Avaliar a efetividade do dentifrício de alta concentração de F na diminuição do processo de desmineralização do esmalte. Material e Métodos: Foram confeccionadas trinta amostras de esmalte bovino, as quais foram lixadas, polidas e obtida a microdureza (Knoop) inicial. As amostras foram distribuídas aleatoriamente em três grupos (G): DP - dentifrício sem F (placebo), DC - dentifrício convencional (1450 ppmF) e DAC - dentifrício de alta concentração (5000 ppmF). Para avaliar o processo dinâmico de desmineralização, cada grupo foi submetido a uma ciclagem de pH com solução desmineralizante e solução remineralizante. As amostras foram imersas durante 6 e 18h nas respectivamente soluções, durante cinco dias, a 37oC. O dentifrício correspondente a cada grupo foi diluído (1:3) e as amostras foram tratadas por 1 minuto, duas vezes ao dia. Após a ciclagem, foi realizada a análise da microdureza final e aplicado ANOVA e Tukey (p<0,05). Resultados: Os resultados mostraram que a microdureza final do DAC (247,4?39,4) comparada ao DC (211,9?53,5) mostrou diferença estatística (p?0,05). Conclusão: De acordo com os resultados, pode-se sugerir que o dentifrício de alta concentração de Flúor apresenta resultados superiores na inibição do processo de desmineralização do esmalte quando comparado ao dentifrício convencional


2016 ◽  
Vol 41 (2) ◽  
pp. 157-161 ◽  
Author(s):  
FG Rolim ◽  
AF Sá ◽  
GWL Silva-Filho ◽  
A de S Brandim ◽  
GC Vale

SUMMARY Aim: This in vitro study analyzed the antierosive potential of a high-fluoride dentifrice on enamel adjacent to restorations. Methods and Materials: Enamel blocks (6 × 6 × 3 mm) from bovine incisor teeth were restored with three different restorative materials (resin, conventional glass ionomer cement, and resin-modified glass ionomer cement) and treated with dentifrices containing 0, 1100, or 5000 ppm F. After restorative procedures, initial surface Vickers hardness of the blocks were obtained. The specimens were submitted to pH cycles (4 × 90 seconds in soft drink) and treatments for five days. Between the challenges and overnight, the blocks remained in artificial saliva. At the end of the experiment, the final hardness was assessed and the percentage of surface mineral loss (%SML) was calculated. A 3 × 3 factorial design was used to conduct statistical analysis. Data were analyzed by analysis of variance and t-test, with significance level fixed at 5%. Results: High-fluoride dentifrice decreased demineralization caused by erosive challenge regardless of the restorative material used (p&lt;0.001). Likewise, the blocks restored with conventional glass ionomer cement showed lower values of SML irrespective of dentifrice used (p&lt;0.001). Conclusion: Use of a high-fluoride dentifrice on teeth restored with conventional glass ionomer cement offers additional protection against enamel erosion.


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