Evaluation of Immediate Post-Polymerization Color Change in One-Shade and Multi-Shade Composite Resins Polymerized with Different Light-Curing Units

Abstract

Objectives This study aimed to evaluate the effect of different light-curing units on the immediate post-polymerization color change of one-shade and multi-shade composite resins. Material and Methods Eight composite resins, comprising 4 universal one-shade (Omnichroma, Charisma Diamond One, Essentia Universal, and Vittra APS Unique) and 4 multi-shade composite resins (Estelite Sigma Quick, Gænial Universal Injectable, Optishade Universal, and Filtek Ultimate) were evaluated. Standardized specimens were prepared using 8 mm-diameter, 2 mm-thickness Teflon molds (n = 10). Baseline color measurements were obtained with a contact-type spectrophotometer (Vita Easyshade Compact) before polymerization. Then the specimens were polymerized using 4 different light-curing units (Elipar S10, VALO Cordless, Woodpecker LED.E, and Woodpecker iLed), and second color measurements were performed. Color differences were calculated using the CIEDE2000 formula. Data were analyzed using a two-way ANOVA and post hoc Tukey tests, with α = 0.05. Results Statistically significant differences in color change were observed among the tested composite resins and light-curing units (P ≤ 0.05). The ΔE00 values ranged from 3.75 to 13.93. The most significant color change was detected in the Omnichroma group polymerized with the Woodpecker iLed unit (ΔE00 = 13.93). In contrast, Estelite Sigma Quick demonstrated the lowest color change when cured with the VALO Cordless (ΔE00 = 3.75). Conclusion Within the limitations of this study, both the type of composite resin and the light-curing units significantly influenced post-polymerization color change. Therefore, shade selection should be performed after polymerization, and the same light-curing unit should be used for polymerization to achieve optimal aesthetic outcomes in clinical practice.

Keywords

• Color change
• composite resin
• light-curing unit
• polymerization

Farklı Işık Cihazları ile Polimerize Edilen Tek Renkli ve Çok Renkli Kompozit Rezinlerde Polimerizasyon Sonrası Anlık Renk Değişiminin Değerlendirilmesi

Öz

Amaç Bu çalışmanın amacı, farklı ışık cihazlarının tek renkli ve çok renkli kompozit rezinlerde polimerizasyon sonrası anlık renk değişimi üzerindeki etkisini değerlendirmektir. Gereç ve Yöntemler Çalışmada, dördü tek renkli universal kompozit (Omnichroma, Charisma Diamond One, Essentia Universal ve Vittra APS Unique) ve dördü çok renkli kompozit rezin (Estelite Sigma Quick, Gænial Universal Injectable, Optishade Universal, Filtek Ultimate) olmak üzere toplam 8 kompozit rezin değerlendirilmiştir. Standart örnekler, 8 mm çapında ve 2 mm derinliğinde silikon kalıplar kullanılarak hazırlanmıştır (n = 10). Polimerizasyon öncesinde, temas tipi bir spektrofotometre (Vita Easyshade Compact) ile başlangıç renk ölçümleri yapılmıştır. Daha sonra örnekler 4 farklı ışık cihazı (Elipar S10, VALO Cordless, Woodpecker LED.E ve Woodpecker iLed) kullanılarak polimerize edilmiş ve ikinci renk ölçümleri gerçekleştirilmiştir. Renk farkları CIEDE2000 formülü kullanılarak hesaplanmıştır. Veriler, iki yönlü ANOVA ve Tukey post-hoc testleri kullanılarak α = 0,05 anlamlılık düzeyinde analiz edilmiştir. Bulgular Test edilen kompozit rezinler ve ışık cihazları arasında renk değişimi açısından istatistiksel olarak anlamlı farklılıklar saptanmıştır (P ≤ 0.05). ΔE00 değerleri 3.75 ile 13.93 arasında değişmiştir. En yüksek renk değişimi, Woodpecker iLed cihazı ile polimerize edilen Omnichroma grubunda (ΔE00 = 13.93) gözlenirken, en düşük renk değişimi VALO Cordless cihazı ile polimerize edilen Estelite Sigma Quick grubunda (ΔE00 = 3.75) görülmüştür. Sonuç Bu çalışmanın sınırlılıkları dahilinde, hem kompozit rezin tipi hem de kullanılan ışık cihazı polimerizasyon sonrası renk değişimini anlamlı derecede etkilemiştir. Bu nedenle, klinik uygulamada optimal estetik sonuçlar elde etmek amacıyla renk seçimi polimerizasyon sonrasında yapılmalı ve polimerizasyon için de aynı ışık cihazı kullanılmalıdır.

Anahtar Kelimeler

• Renk değişimi
• kompozit rezin
• ışık cihazı
• polimerizasyon

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