The Effect of the Water Flow Rate During Laser Irradiation on the Bond Strength of Glass Fiber Posts

Abstract

Objective: This study aimed to investigate the effect of the water flow rate during laser irradiation on the bond strength of GFRC posts. Background: Due to the ablation mechanism, water molecules must be present in the target tissue for effective results with erbium lasers. Materials and methods: Sixty glass fiber posts were divided into six equal groups: control groups, sandblasting with 30 μm Al2O3 particles, 9.5% hydrofluoric acid (HF), and three different flow rates (1%, 50%, and 100%) laser groups (n = 10). Resin cement was applied to the surfaces of the fiber posts. Then, 1 mm thick sections were taken from each specimen and micro tensile bond strength test was applied. The data obtained were statistically analyzed by a one-way analysis of variance and Tukey’s HSD test. Results: According to the statistical analysis results, there was a significant difference between the bond strength values of all the groups (P < 0.001). The highest bonding value was obtained in the sandblasted group (12.25 ± 0.38) and the lowest in the control group (5.64 ± 0.6). After sandblasting, the highest value was observed in the laser applied group (10.57 ± 0.64) at 100% flow rate. Conclusions: As the water flow rate decreases in laser applications, the bond strength between the fiber post and resin cement decreases.

Keywords

• Bond strength
• fiber post
• laser etching
• resin cement
• SEM

Lazer Işınlama Sırasında Su Akış Hızının Cam Fiber Postların Bağlanma Mukavemeti Üzerindeki Etkisi

Abstract

Amaç Bu çalışmanın amacı, lazer ışınlama sırasında su akış hızının GFRC postların yapışma mukavemeti üzerindeki etkisini araştırmaktır. Arka planlama: Ablasyon mekanizması nedeniyle, erbiyum lazerler ile etkili sonuçlar için hedef dokuda su molekülleri bulunmalıdır. Gereç ve yöntemler: Altmış cam fiber post altı eşit gruba ayrıldı: kontrol grupları, 30 μm Al2O3 partikülleri ile kumlama, %9,5 hidroflorik asit (HF) ve üç farklı akış hızında (%1, %50 ve %100) lazer grupları (n = 10). Fiber postların yüzeylerine rezin siman uygulanmıştır. Daha sonra her bir numuneden 1 mm kalınlığında kesitler alınmış ve mikro çekme bağlanma dayanımı testi uygulanmıştır. Elde edilen veriler tek yönlü varyans analizi ve Tukey HSD testi ile istatistiksel olarak analiz edilmiştir. Sonuçlar: İstatistiksel analiz sonuçlarına göre, tüm grupların bağlanma mukavemeti değerleri arasında anlamlı bir fark vardı (P < 0.001). En yüksek bağlanma değeri kumlanmış grupta (12.25 ± 0.38), en düşük değer ise kontrol grubunda (5.64 ± 0.6) elde edilmiştir. Kumlama sonrasında en yüksek değer %100 akış hızında lazer uygulanan grupta (10.57 ± 0.64) gözlenmiştir. Sonuçlar: Lazer uygulamalarında su akış hızı azaldıkça fiber post ile rezin siman arasındaki bağlanma dayanımı azalmaktadır.

Keywords

• Bağlanma dayanımı testi
• fiber post
• lazer ışınlanma
• rezin siman
• SEM

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