Evaluation of fluoride releasing and recharging of orthodontic adhesive resins: An in vitro study.

  • Sava Bakhtyar Department of Pedodontics, Orthodontics and Preventive Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraqi Kurdistan Region.
  • Bayan Abdullah Hassan Department of Pedodontics, Orthodontics and Preventive Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraqi Kurdistan Region.
Keywords: Fluoride release, fluoride recharge, ortho-adhesive resin


Background and objective: Development of white spot lesions to be a well-recognized and common side effect of orthodontic fixed appliance, in spite of vast improvement in preventive dental techniques and procedures. The aim of this study is to determine and compare amount of fluoride releasing and recharging of orthodontic adhesive resins.
Materials and methods: 12 specimens for fluoride releasing and recharging were used for each tested materials, materials tested for fluoride releasing were Transbond plus color change and Resilience (fluoridated ortho-adhesive resin). Fluoride releasing was estimated daily for 14 days, then weekly up to 28 days, then at day 42, 70 days. For fluoride recharging in addition to above materials Transbond XT (non-fluoridated ortho-adhesive resin) were used as a control group. The 12 specimens of each material were divided into two equal subgroups to simulate two different methods of fluoride application, namely, brushing with fluoride-containing toothpaste and after the topical application of fluoride gel. Fluoride releasing was measured at days 1,2,3,7 for gel application while for brushing group releasing of fluoride was measured at 7 days.
Results: Mann Whitney test, Kruskal Wallis test and Wilcoxon signed rank test were used for statistical analysis. During tested period all materials showed statically different capacity to release and uptake fluoride. Transbond plus color change was highest ability for fluoride releasing and recharging when compared to others materials.
Conclusion: Transbond plus color change and Resilience, showed fluoride release in distal de-ionized water. For fluoride recharging Transbond plus color change had more ability for re-charging than two other materials.


Maret D, Marchal-Sixou C, Vergnes J, Hamel O, Georgelin-Gurgel M, Van Der Sluis L, et al. Effect of fixed orthodontic appliances on salivary microbial parameters at 6 months: a controlled observational study. J Appl Oral Sci. 2014;22(1):38-43.

Sundararaj D, Venkatachalapathy S, Tandon A, Pereira A. Critical evaluation of incidence and prevalence of white spot lesions during fixed orthodontic appliance treatment: A meta-analysis. J Int Soc Prev & Comm Dent. 2015;5(6):433-9.

Kelly MT. An In vitro study of antimicrobial properties of an orthodontic sealant adhesive containing Selenium. University of North Carolina at Chapel Hill 2014.

Cosma LL, Suhani RD, Mesaros A, Badea ME. Current treatment modalities of orthodontically induced white spot lesions and their outcome - a literature review. Medicine and pharmacy reports. 2019; 92(1):25-30.

Chapman JA, Roberts WE, Eckert GJ, Kula KS, Gonzalez-Cabezas C. Risk factors for incidence and severity of white spot lesions during treatment with fixed orthodontic appliances. AJODO. 2010; 138(2):188-94.

Beerens MW. White spot lesions after orthodontic fixed appliance treatment, the effectiveness of MI Paste Plus® as a remineralising agent: A randomised controlled trial. 2018.

Khalaf K. Factors affecting the formation, severity and location of white spot lesions during orthodontic treatment with fixed appliances. J Oral & Maxillofac Res. 2014;5(1):e4.

Poole M. Efficacy of orthodontic bonding agents in preventing demineralization around brackets. 2010.

Zarzycka-Kogut K, Pucek M, Szymańska J. Orthodontic treatment – complications and preventive measures. Polish J Pub Healt. 2014;124(2).

Srivastava K, Tikku T, Khanna R, Sachan K. Risk factors and management of white spot lesions in orthodontics. J Orthod Sci. 2013; 2(2):43-9.

Alanzi A, Velissariou M, Al-Melh MA, Ferguson D, Kavvadia K. Role of taste perception in white spot lesion formation during orthodontic treatment. Angl Orthod. 2019.

Yassin SA. A fluoride releasing dental prosthesis copolymer for oral biofilm control. 2014.

Lodaya SD, Keluskar K, Naik V. Evaluation of demineralization adjacent to orthodontic bracket and bond strength using fluoride-releasing and conventional bonding agents. Ind J Dent Res. 2011; 22(1):44.

Santos RLd, Pithon MM, Fernandes ABN, Carvalho FG, Cavalcanti AL, Vaitsman DS. Fluoride release/uptake from different orthodontic adhesives: A 30-month longitudinal study. Braz Dent J. 2013; 24(4):410-4.

Ullah R, Zafar MS, Shahani N. Potential fluoride toxicity from oral medicaments: A review. Iran J Basic Med Sci. 2017; 20(8):841-8.

Ahn SJ, Lee SJ, Lee DY, Lim BS. Effects of different fluoride recharging protocols on fluoride ion release from various orthodontic adhesives. J Dent. 2011; 39(3):196-201.

Bouvier AJ. Fluoride release, recharge, and re-release from four orthodontic bonding system. 2012.

Ismail HM. Further development of a novel fluoride releasing acrylic orthodontic adhesive. 2016.

Caldeira EM, Osorio A, Oberosler EL, Vaitsman DS, Alviano DS, Nojima Mda C. Antimicrobial and fluoride release capacity of orthodontic bonding materials. J Appl Oral Sci. 2013;21(4):327-34.

Ghajari MF, Torabzadeh H, Safavi N, Sohrabi A, Ardakani FF. Fluoride release from three glass ionomers after exposure to sodium fluoride and acidulated phosphate fluoride gels. Dent Res J. 2014; 11(5):604.

Rao BS, Moosani GK, Shanmugaraj M, Kannapan B, Shankar BS, Ismail PM. Fluoride release and uptake of five dental restoratives from mouth-washes and dentifrices. J Int Oral Healt. 2015; 7(1):1-5.

Soliman MM, Bishara SE, Wefel J, Heilman J, Warren JJ. Fluoride release rate from an orthodontic sealant and its clinical implications. Angl Orthod. 2006;76(2):282-8.

Gururaj M, Shetty R, Nayak M, Shetty S, Kumar CV. Fluoride releasing and uptake capacities of esthetic restorations. J Contemp Dent Prac. 2013; 14(5):887-91.

Corry A, Millett DT, Creanor S, Foye R, Gilmour W. Effect of fluoride exposure on cariostatic potential of orthodontic bonding agents: An in vitro evaluation. J Orthodontics. 2003; 30(4):323-9.

Silva KG, Pedrini D, Delbem AC, Cannon M. Microhardness and fluoride release of restorative materials in different storage media. Braz Dent J. 2007; 18(4):309-13.

Taqa AA, Abdal A-k, Dawood AI. The effect of pH on fluoride release of glass ionomer based restorative materials. Intl J Dent Sci & Res. 2016; 4(3):52-7.

Preston AJ, Agalamanyi EA, Higham SM, Mair LH. The recharge of esthetic dental restorative materials with fluoride in vitro-two years' results. Dent Mater. 2003; 19(1):32-7.

Madhyastha P, Kotian R, Pai, V. , Khader AMA. Fluoride release from glass ionomer cements effect of temperature, time interval and storage condition. J Contem Dent. 2013; 3(2):68-73.

Garoushi S, Vallittu PK, Lassila L. Characterization of fluoride releasing restorative dental materials. Dent Mater J. 2018; 37(2):293-300.

Poggio C, Andenna G, Ceci M, Beltrami R, Colombo M, Cucca L. Fluoride release and uptake abilities of different fissure sealants. J Clin & Experim Dent. 2016; 8(3):e284.

Yap A, Tham S, Zhu L, Lee H. Short-term fluoride release from various aesthetic restorative materials. Operat Dent. 2002; 27(3):259-65.

McCabe JF, Carrick TE, Sidhu SK. Determining low levels of fluoride released from resin based dental materials. Eur J Oral Sci. 2002; 110(5):380-4.

Nagi SM, Moharam LM, El Hoshy AZ. Fluoride release and recharge of enhanced resin modified glass ionomer at different time intervals. Future Dent J. 2018; 4(2):221-4.

Wagner L, Szepietowska M. Fluoride penetration from three orthodontic adhesives: An experimental study. Korean J Orthod. 2013; 43(1):29-34.

Dionysopoulos D, Koliniotou-Koumpia E, Helvatzoglou-Antoniades M, Kotsanos N. Fluoride release and recharge abilities of contemporary fluoride-containing restorative materials and dental adhesives. Dent Mater J. 2013; 32(2):296-304.

Dionysopoulos D. The effect of fluoride-releasing restorative materials on inhibition of secondary caries formation. Fluoride. 2014; 47(3):258-65.

Xu X, Burgess JO. Compressive strength, fluoride release and recharge of fluoride-releasing mate-rials. Biomaterials. 2003; 24(14):2451-61.

Marinho VC, Higgins JP, Sheiham A, Logan S. One topical fluoride (toothpastes, or mouthrinses, or gels, or varnishes) versus another for preventing dental caries in children and adolescents. Cochrane Database of Systematic Reviews. 2004(1).

How to Cite
Bakhtyar, S., & Hassan, B. (2021). Evaluation of fluoride releasing and recharging of orthodontic adhesive resins: An in vitro study. Erbil Dental Journal (EDJ), 3(2), 126-134. https://doi.org/10.15218/edj.2020.18
Original Articles