Effect Of Different Bleaching Methods On The Colour Change And Surface Properties

Year 2024, , 1 - 8, 03.01.2024

Işıl Turp , İlkin Tuncel , Volkan Turp , Aslihan Usumez

https://doi.org/10.17214/gaziaot.1218514

Abstract

Objective: The aim of the current study was to investigate the effect of bleaching of 40% hydrogen peroxide without any light activation, with LED light activation or with Er:YAG laser activation on colour change, surface microhardness and surface roughness.
Materials and Method: Third molar teeth were used in the study. Their enamel surfaces were flattened with sandpaper up to 2200 grit after they were embedded in acrylic resin. One control and three experimantal groups were evaluated. The experimental groups were the group bleaching gel was applied without any light activation (Group J), the group bleaching gel was activated with LED light source with a wavelength of 385-515 nm and power of 3200 mW/cm2 (Group LED) and the group bleaching gel was activated with Er:YAG laser in the VLP mode (1000 µs pulse time) with 50 mJ energy and 10 Hz frequency (Group Er:YAG). Colour was measured before and after bleaching and the difference (∆E00) was calculated using the CIEDE2000 formula. The microhardness of the specimens were measured after 980 g load application for 15 s and the surface roughness was measured with a contact-type profilometer after storage in artificial saliva for one week. Statistical analysis was carried out with Oneway ANOVA test.
Results: In all bleaching groups, the color change was found to be above the visual detection threshold, but there was no significant difference between the groups. (p>0.05). There wasn’t also any statistically significant difference in microhardness and surface roughness between the groups (p>0.05).
Conclusion: The surface properties of the enamel one week after bleaching didn’t differ from non-bleached enamel.

Keywords

LED, colour change, Er:YAG laser, in-office bleaching, microhardness, roughness

Project Number

12-2014/32

Farklı Diş Beyazlatma Yöntemlerinin Dişlerde Renk Değişimi ve Yüzey Özelliklerine Etkileri

Abstract

Amaç: Işık ile aktive edilmeden, LED ışık kaynağı ile ve Er: YAG lazer ile aktive edilen %40 konsantrasyondaki hidrojen peroksit (HP) beyazlatma jeli ile beyazlatma işleminin renk değişikliğine, yüzeyin mikrosertlik ve pürüzlülük özelliklerine olan etkilerini incelemektir.
Gereç ve Yöntem: Çalışmada çekilmiş sağlıklı üçüncü büyük azı dişleri kullanılmıştır. Akrilik bloklara gömülen dişler 2200 grit’e kadar zımpara ile zımparalanarak minede düz yüzeyler elde edilmiştir. Biri kontrol grubu (Grup K) olmak üzere toplam dört grup değerlendirilmiştir. Bunlar; aktivasyon yapılmaksızın beyazlatma jeli uygulanan grup (Grup J), 385-515 nm dalga boyunda ve 3200 mW/cm2 güçte ışık üreten LED ışık kaynağı ile beyazlatma yapılan grup (Grup LED) ve 50 mJ enerji ile10 Hz’de ve VLP modunda (1000 µs atım süresi) ile kullanılan Er:YAG lazer ile aktivasyon yapılan gruptur (Grup Er:YAG). Beyazlatma işleminin öncesinde ve sonrasında spektrofotometre ile renk ölçümü yapılmış ve renk değişimi (∆E00) CIEDE2000 formülü ile hesaplanmıştır. Bir hafta örnekler yapay tükürük içerisinde bekletildikten sonra 980 g yük 15 s boyunca uygulanarak mikrosertlik ölçümleri ve kontakt tipi bir profilometre ile pürüzlülük ölçümleri yapılmıştır. Veriler Oneway ANOVA testi ile değerlendirilmiştir.
Bulgular: Beyazlatma yapılan tüm gruplarda renk değişikliği gözle fark edilebilme eşiğinin üzerinde saptanırken gruplar arası anlamlı farklılık bulunmamıştır. Kontrol grubu ile beyazlatma yapılan gruplarda mikrosertlik ve pürüzlülük değerleri anlamlı bir değişim göstermemiştir.
Sonuç: Beyazlatma işleminden bir hafta sonra diş minesinin yüzey özellikleri beyazlatma yapılmamış mineden farklı değildir.

Keywords

Ofis tipi beyazlatma, LED, Er:YAG lazer, renk değişimi, mikrosertlik, pürüzlülük

Supporting Institution

Bezmialem Vakıf Üniversiesi Bilimsel Araştırma Projeleri Birimi

Project Number

12-2014/32

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