Efficacy of Three Enamel Protecting Agents on Shear Bond Strength of Orthodontic Brackets Bonded to Demineralised Enamel with Conventional Adhesive

Journal of Clinical and Diagnostic Research

卷:15

Smita Nimbalkar¹  Sze Ying Sia²  Zi Thung Lee²  Ken Horng Lim²  Li Huey Lim² 

[1] Senior Lecturer, Department of Orthodontics, Division of Clinical Oral health Sciences, School of Dentistry,International Medical University,WP Kuala Lumpur, Malaysia.;

[2] Undergraduate Student, Faculty of Dentistry, MAHSA University, Selangor, Malaysia.;

关键词: fluoride varnish;    gc tooth mousse;    remineralisation;    resin infiltrant;    universal testing machine;    white spot lesion;   

DOI  :  10.7860/JCDR/2021/49686.15771

来源: DOAJ

【 摘 要 】

Introduction: Enamel demineralisation is common in thepatients undergoing orthodontic treatment with fixed applianceand bonding of the orthodontic brackets on demineralisedenamel surfaces compromises clinical outcome.Aim: To compare the effect of flouride varnish, CaseinPhosphopeptide-Amorphous Calcium Phosphate Fluoride(CPP-ACPF) and resin infiltrant on Shear Bond Strength (SBS) ofadhesives used to bond orthodontic brackets on demineralisedenamel.Materials and Methods: This comparative in-vitro study wasconducted in the Faculty of Dentistry, MAHSA University, KualaLumpur, Selangor, Malaysia, from September 2017 to March2018. A total of 60 premolars were exposed to three cycles ofdemineralisation-remineralisation for 18 days and were groupedequally into four groups. Group I was without any enamelpretreatment while group II was treated with Fluoride varnish(Duraphat), group III with CPP-ACPF (GC Tooth Mousse Plus)and group IV with resin infiltrant (Icon). The orthodontic bracketswere bonded to buccal surface of premolars with Transbond XT,conventional orthodontic light cure adhesive system and SBS(MPa) was measured following mechanical shearing of bracketunder universal testing machine. Statistical comparisons weredone using Welch Analysis of Variance (ANOVA) and GamesHowell Post-hoc Test.Results: The highest SBS values were found in group IV (16±5.2MPa) followed by group I (13.5±6.6 MPa), group III (9.8±2.8MPa) and group II (3.4±2.7 MPa). Pairwise comparison ofSBS scores between following groups were found statisticallysignificant i.e., Group I and group II (p-value< 0.001), group IIand group III (p-value< 0.001), group II and group IV (p-value<0.001), and between group III and group IV (p-value= 0.004).The SBS scores between group I and group III (p-value=0.212)and between group I and group IV (p-value=0.671) were notsignificantly different from each other.Conclusion: Demineralised enamel pretreated with resininfiltrant (Icon) showed highest SBS among all the groups whilefluoride varnish application showed lowest SBS. To preventremineralisation during orthodontic treatment, Icon can be usedas prophylaxis agent before brackets are bonded to teeth withenamel lesion.

【 授权许可】

Unknown