This study evaluated the effect of remineralization agents on bleaching efficiency, enamel mineral changes, and post-bleaching color stability. A total of 112 enameldentin blocks were prepared from bovine teeth. Following initial color measurements, separate treatment regimens were carried out as follows: negative control (no treatment); positive control (bleaching only); bleaching, then NaF; bleaching + NaF (mix); bleaching, then CPP-ACPF; bleaching + CPP-ACPF (mix); bleaching, then nHAP+F; bleaching + nHAP+F (mix). Color measurements were repeated after immersion in distilled water for 7 days, and again after staining with coffee solution for 14 days. The CIELAB-based whiteness index was used to evaluate bleaching efficiency, and the CIEDE2000 color difference formula for color stability. Chemical investigation was performed using scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction analyses. The experimental groups showed significant increases in whiteness compared to the negative control, and the staining after bleaching did not result in statistically significant differences between the groups. Energy dispersive spectroscopic analysis revealed that bleaching protocols had no impact on elemental levels as well as the ratio of Ca/P. The combined use of bleaching agents with remineralization agents did not affect bleaching effectiveness but also did not provide an additional contribution.
Günümüzde, rezin esaslı kompozitler; matriks, doldurucu ve
başlatıcı teknolojilerindeki gelişmelerden dolayı posterior dişler için en
popüler restoratif materyallerdir. Geçtiğimiz birkaç yılda ise kompozit rezinlerdeki güncel
gelişmeler, bulk-fill kompozitleri restoratif diş hekimliğine kazandırmış olup, bu alandaki
çalışmalar devam etmektedir. Bulk fill kompozitler arasında doldurucu miktarı,
inorganik partikül boyutları ve morfolojileri, monomer tipi ve fotobaşlatıcı
kimyalarına bağlı belirgin farklılıklar mevcuttur. Tüm bu farklılıklar
bulk-fill kompozitlerin polimerizasyon derinliği, dönüşüm derecesi, marjinal
bütünlük, biyouyumluluk, mekanik ve fiziksel özellikleri üzerinde belirgin etkilere sahiptir. Bu derlemenin
amacı; klinik kullanımları gün geçtikçe artan bulk-fill kompozitler hakkındaki
genel bilgiler ile literatürde yer almış olan in vivo ve in vitro
çalışmaları irdeleyerek okuyucunun bilgisine sunmaktır.
Anahtar Kelimeler:
bulk-fill, kompozit rezinler,
polimerizasyon derinliği, büzülme stresi
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