Cam fiber ilave edilen iki farkl geçici restoratif materyalin transvers dayankllnn, elastikiyet modülünün ve maksimum eilme miktarnn incelenmesi

Investigation of transvers strenght, modulus of elasticity and maximum deflection of fiber reinforced two provisional restorative material

Özet

Amaç: Bu çalmann amac, polietil metakrilat (PEMA) ve bis-akril kompozit esasl iki geçici kron-köprü materyaline farkl konsantrasyonlarda cam fiber ilavesinin transvers dayanma, maksimum eilmeye ve elastikiyet modülüne etkisini incelemektir. Materyal Metot: 3 mm boyutunda ksa kesilmi E-cam fiber PEMA ve bis-akril kompozit esasl iki geçici kron-köprü materyaline % 1 ve % 2 orannda ilave edildi (n=10). Fiber ilavesi yaplmayan bis-akril ve PEMA örnekleri kontrol grubu olarak kullanld (n=10). Toplamda 60 adet örnee 1mm/dak balk hz ile Instron Universal test cihaznda 3 nokta bükülme kuvveti uyguland. Transvers dayanm, maksimum eilme ve elastikiyet modülü deerleri hesapland: Her gruptan 1’er örnek scanning elektron mikroskobunda incelendi. statistiksel analiz Kruskal-Wallis testi ile çoklu karlatrmalar ise Siegel-Castellan testi ile yapld. Bulgular: Bis-akril kompozitin elastikiyet modülü ve maksimum eilme özellikleri PEMA’ya göre daha iyi bulunmutur. Ancak her iki materyalin transvers dayanmlar arasnda fark bulunamam tr. Bis-akril kompozit grubuna % 1 ve % 2 cam fiber ilavesi ve PEMA grubuna % 1 cam fiber eklenmesi maksimum eilme, elastikiyet modülü ve transvers dayanm etkilememitir. PEMA grubuna %2 cam fiber ilavesi, maksimum eilmeyi azalt rken elastikiyet modülünü arttrm, transvers dayan m ise etkilememitir. Sonuç: Geçici kron-köprü materyali seçiminde, elastikiyet modülü ve maksimum eilme bak- mndan bis-akril kompozit PEMA’ya göre daha güvenli kullanlabilir. PEMA materyalinin kullanm durumunda ise materyale % 2 konsantrasyonda cam fiber ilavesi maksimum eilme ve elastikiyet modülü bakmndan önerilebilir.

Abstract

Purpose: This study investigated the effects of different concentrations of glass fiber addition on the transverse strength, modulus of elasticity and maximum flexure of polyethylmethacrylate (PEMA) and bis-acryl composite based provisional crown materials. Materials and Methods: Test specimens (n=10) of 1% and 2% weight fiber concentrations were prepared with either a bis-acryl composite or a PEMA provisional crown material. Bis-acryl composite or PEMA provisional crown specimens without any fiber reinforcement were used as control groups. The transverse strength, maximum flexure and modulus of elasticity was measured with the 3-point bending test.3-point bending test was applied to sixty specimens with a universal testing machine at a crosshead speed of 1 mm/min. One specimen for each group was evaluated in SEM. Statistical analysis was performed with Kruskal-Wallis test and multiple comparisons were done with Siegel-Castellan test. Results: Maximum flexure and modulus of elasticity properties of bis-acryl composite were found significantly better than the PEMA material. However, both of the materials showed same transverse strength values. 1 % and 2 % concentration of glass fiber addition to the bis-aryl composite and 1 % concentration of glass fiber addition to the PEMA did not show significant effect for transverse strength, maximum flexure and modulus of elasticity. While 2 % concentration of glass fiber addition to the PEMA decreasing the maximum flexure, it increased the modulus of elasticity and it did not affect the transverse strength. Conclusion: Bis-acryl composite could be used more safely than PEMA as a provisional crown material in terms of maximum flexure and modulus of elasticity. In the case of using PEMA as a provisional crown material, the addition of 2 % glass fiber could be suggested in terms of maximum flexure and modulus of elasticity.