EFFECT OF SURFACE SEALING ON STAIN RESISTANCE OF A NANO-HYBRID RESIN COMPOSITE

Abstract

Purpose: This study investigated the influence of
sealant application on stain resistance of a nanohybrid
resin composite compared to the efficacy of a
bonding agent used as a surface sealant on prolonging
color stability of the resin composite.
Materials and Methods: 28 disc-shaped materials
were prepared from a nano-hybrid resin composite
Filtek Z550 and assigned to four groups: G1K: nonsealed;
G2:Adper Single Bond; G3: Fortify ; G4:
Biscover LV. After 24 h storage in distilled water at
37˚C, all specimens were subjected to thermocycling
and immersed into coffee solution. Color measurements
were performed using spectrophotometer (VITA
Easyshade; Vident) according to CIEL*a*b* system.
Results: Color change values were significantly
different among the groups in each evaluation period
except for after thermocycling (p<0.05). For 7 days
evaluation period, the difference between G3 and G4
group was statistically significant while G4 exhibited
statistically significant differences (p<0.05 and
p<0.0001 respectively) compared to control (G1) in
14 day whereas no significant difference was found
between GI and GII in 28-day evaluation period.
However, ΔE values of sealed specimens (GIII, GIV)
differed significantly from non-sealed (GI) specimens
after 28 days of immersion in coffee solution (p<0.05
and p<0.0001 respectively).
Conclusion: It may be concluded that using a
bonding agent as a surface sealant does not increase
stain resistance of resin composites of the sealants
evaluated. Biscover LV showed the highest efficacy
to prolong color stability of the resin composite.

Keywords

• Color; surface sealant; discoloration; composite; coffee

Nano-Hibrit Bir Kompozitin Renkleşmesinde Yüzey Örtücülerin Etkisi

Abstract

Amaç: Bu çalışmada nanohibrit yapıda bir reçine kompozit yüzeyine uygulanan yüzey örtücülerin ve dentin bağlayıcı ajan uygulanmasının; kompozitin (Filtek Z550) renkleşmeye karşı direnci üzerine etkisinin araştırılması amaçlanmıştır.Gereç ve Yöntem: Çalışmada 28 adet Filtek Z550 nano hibrit kompozitten hazırlanan disk biçimindeki örnekler 4 gruba ayrılmıştır: G1K: yüzey örtücü uygulanmamış; G2:Adper Single Bond, G3:Fortify, G4: Biscover LV. 24 saat 37˚C de distile suda bekletilip termosiklus uygulanan örnekler daha sonra günde 3 kere olmak üzere toplam 28 gün kahve solüsyonunda bekletilmişlerdir.Bulgular: Başlangıç değerleri dışında, gruplar arası renk değişim değerleri, tüm zaman aralıklarında istatistiksel olarak anlamlı derecede farklı bulunmuştur (p < 0.05). 7 günün sonunda, gruplar karşılaştırıldığında G3 ve G4 grupları arasında istatistiksel olarak anlamlı derecede fark bulunmuştur. G4 grubu 14 günün sonunda kontrol grubuna göre istatistiksel olarak anlamlı derecede farklılık göstermiştir. Ancak 28 günlük deney sonucunda, GIII (p < 0.05) ve GIV (p < 0.0001) gruplarına ait ∆E değerleri istatistiksel olarak kontrol grubuna göre anlamlı bulunmuştur.Sonuç: Bağlayıcı ajanın yüzey örtücü olarak kullanılmasının kompozitin renkleşmeye karşı direncini yeterli düzeyde arttırmadığı, Biscover LV yüzey örtücünün kompozitin renk stabilitesinin uzun dönem sağlanmasında en yüksek değerleri verdiği sonucuna varılmıştır

Keywords

• Renk, yüzey örtücü, renkleşme, kompozit, kahve

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