COMPARISON OF DIAMETRAL TENSILE, FLEXURAL, AND COMPRESSIVE STRENGTHS OF FIVE CORE BUILD-UP MATERIALS

Öz

The purpose of this laboratory investigation was to evaluate three mechanical properties; the compressive, diametral tensile and flexural strengths of five different core build-up materials. In this study, a light-actived Hybrid composite resin (President), resin modified glass ionomer (RMGIC) (Vitremer), amalgam (Cavex avalloy), glass-ionomer (GIC) (Logofil) and compomer (Dyract AP) restorative materials were used. 120 samples were prepared according to American Dental Association specification No. 27 for testing diametral tensile strength (DTS), compressive strength (CS) and flexural strength (FS). Forty specimens were prepared in cylindric molds (6 mm in height, 3 mm in diameter) for the CS measurements and forty specimens (3
mm in height, 6 mm in diameter) for diametral tensile strength (DTS). Forty specimens were prepared (25X 2 X 2 mm) for the FS measurements. All cores materials were prepared according to manufacturer’s instruction at a temperature of 23.0 +/- 1.0 degrees C. Haunsfield press and pull machine was used for compressive and flexural strength and the module were determined at a crosshead speed of 0.5 mm/min. Diametral testing was carried out at 1 mm/min. Analysis of variance was used for statistically evaluation. Mean compressive, diametral tensile and flexural strengths with associated standard deviations were calculated for each material. The results of this study indicated that the diametral tensile strength, flexural strength and compressive strength of the resin composite (President) and amalgam material were significantly higher than the other tested materials (p<0.001). On the other hand, the diametral tensile strength, flexural strength and compressive strength of glass ionomer based materials (Logofil, Vitremer) were statistically lower than for resin composites, compomer and amalgam.

Anahtar Kelimeler

• Core materials
• diametral tensile strength
• compressive strength

BEŞ FARKLI KOR MATERYALİNİN ÇAPSAL GERİLİM, BÜKÜLME VE SIKIŞTIRMA DİRENCİNİN KARŞILAŞTIRILMASI

Öz

Bu çal man n amac , be farkl kor materyalinin üç mekanik özelliGi; çapsal germe direnci, s k t rma direnci ve bükülme direncini deGerlendirmektir. Bu çalma için, kla sertle en hibrid kompozit rezin (President, Light cure Dynamic Universal hibrit Compozit, München, Germany), rezin modifiye cam iyonomer (Vitremer, 3M Dental Products, St. Paul MN, USA), amalgam (Cavex Avalloy, Harlem, Hollanda), cam iyonomer (Logofil, D-Dental Alten, Alten Walde, Germany) ve compomer (Dyract AP) materyalleri kullan ld . Çapsal germe direnci, s k t rma direnci ve bükülme direnci testi için toplam 120 örnek American Dental Association 27 nolu spesifikasyonuna göre haz rland . 6mm yüksekliGinde ve 3mm çap nda 40 silindirik örnek, çapsal germe direnci için ve 25X2X2 mm boyutlar nda 40 örnek ise bükülme direnci testi için haz rland . Tüm kor materyalleri üretici firma önerileri doGrultusunda 23.0 +/- 1.0 0C’de haz rland .Testler Hounsfield çekme-s k t rma makinesinde, bükülme ve s k t rma gerilim testleri 0.5 mm/dak.ve çapsal gerilim testi için 1 mm/dak. ba l k h z ile yap ld . Lstatistiksel deGerlendirme için varyans analizi kullan ld . Her bir materyal için Çapsal germe direnci, s k t rma direnci ve bükülme direncine ait ortalama ve standart sapma deGerleri hesapland . Çal man nsonuçlar na göre Çapsal germe direnci, s k t rmadirenci ve fleksural gerilim direnci aç s ndan Kompozit resin (President) ve Amalgam(Cavex avalloy), diGer test edilen materyallere göre önemli derecede yüksek bulundu. (p

Anahtar Kelimeler

• Kor materyali
• Çapsal germe direnci
• s k t rma direnci

Kaynakça

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