Evaluation of orthodontic bracket bonding strength on demineralized enamel: Effects of remineralization agents and SEM examination

Year 2023, , 744 - 752, 30.12.2023

Alaattin Tekeli , Serkan Görgülü , Fidan Alakus Sabuncuoglu , Gökhan Serhat Duran

https://doi.org/10.18663/tjcl.1380618

Abstract

Aim: To evaluate the shear bond strength (SBS) of orthodontic brackets bonded to demineralized enamel treated with four different remineralization agents and examine enamel surfaces using scanning electron microscopy (SEM).
Material and Methods: In this in vitro study, 120 premolar teeth were examined. The premolars were divided into six groups as; negative control (Group NC) with erosion remineralization cyclus were applied without any treatment agent, positive control (Group PC), treated with fluoride (Group F), with combined fluoride and diode laser (Group F+D), with CPP-ACP (Group M) and treated with nano-hydroxyapetite (Group B). Erosion remineralization cycle were applied to all samples except PC group. For each group, 20 samples were tested in SBS and examined using scanning electron microscopy (SEM).
Results: There was a statistically significant difference between groups in terms of the SBS values of the orthodontic brackets (p˂0.001). There was no statistically significant difference between Group M and Group B (p = 0.375). There was a significant difference in all other binary comparisons (p˂0.001). The sequence in terms of the SBS values of orthodontic brackets applied after erosion remineralization cycle of the groups were; Group NC (sound enamel)>Group B~Group M >Group F+D >Group F >Group PC (eroded enamel). SEM examinations corroborated the findings.
Conclusions: It was determined that remineralization materials applied in all study groups significantly increased the shear bond strength values of the eroded tooth surfaces. Group M and Group B were more efficient than other groups providing clinically acceptable SBS values for the bonding of orthodontic brackets to previously treated demineralized enamel surfaces.

Keywords

Enamel, erosion, remineralization, shear bond strength.

Farklı yöntemlerle tedavi edilen erozyonlu mine yüzeyine uygulanan ortodontik braketlerin bağlanma dayanımlarının karşılaştırılması

Abstract

Amaç: Çalışmanın amacı ortodontik braketlerin, dört farklı remineralizasyon ajanı ile işlenmiş demineralize mineye bağlanma dayanımının (Shear Bond Strength- SBS) değerlendirmesi ve taramalı elektron mikroskobu (SEM) kullanarak mine yüzeylerinin incelenmesidir.
Gereç ve Yöntemler: Bu in vitro çalışmada, 120 premolar diş incelenmiştir. Premolar dişler 20’şer dişin olduğu altı gruba ayrıldı: negatif kontrol (Grup NC)- herhangi bir tedavi ajanı uygulanmadan erozyon remineralizasyon döngüsü uygulanan grup, pozitif kontrol (Grup PC), florür ile tedavi edilen grup (Grup F), kombinasyon halinde florür ve diyot lazer ile tedavi edilen grup (Grup F+D), CPP-ACP ile tedavi edilen grup (Grup M) ve nano-hidroksiapatit ile tedavi edilen grup (Grup B). PC grubu hariç tüm örneklerde erozyon remineralizasyon döngüsü uygulandı. Her bir grup için 20 örnek, yapışma dayanımı SBS testine tabi tutuldu ve SEM kullanılarak incelendi.
Bulgular: Ortodontik braketlerin SBS değerleri açısından gruplar arasında istatistiksel olarak anlamlı fark tespit edildi (p˂0.001). Grup M ve Grup B arasında istatistiksel olarak anlamlı bir fark bulunmamaktaydı (p = 0.375). Diğer tüm ikili karşılaştırmalarda önemli bir fark vardı (p˂0.001). Grupların erozyon remineralizasyon döngüsü sonrasında uygulanan ortodontik braketlerin SBS değerleri sırası şu şekildeydi; Grup NC (sağlam mine)> Grup B ~ Grup M> Grup F+D> Grup F> Grup PC (erozyona uğramış mine). SEM incelemeleri SBS bulgularını destekler niteliteydi.
Sonuç: Çalışmamızdaki tüm gruplara uygulanan remineralizasyon materyallerinin, erozyona uğramış diş yüzeylerinin yapışma dayanım değerlerini önemli ölçüde arttırdığı belirlendi. Grup M ve Grup B, demineralize mine yüzeylerine ortodontik braketlerin yapıştırılması için klinik olarak kabul edilebilir SBS değerleri sağlama konusunda diğer gruplardan daha etkili bulundu.

Keywords

Mine, erozyon, remineralizasyon, bağlanma dayanımı.

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