Publication: Metal desteksiz adeziv köprülerin mekanik direncinin in-vitro olarak incelenmesi
Abstract
Metal desteksiz adeziv köprülerin mekanik direncinin in-vitro olarak incelenmesi: Bu çalışmanın amacı iki farklı metal desteksiz restorasyon materyalinin (IPS Empress 2, Adoro-Vectris) tam kaplama ve inley destekli köprülerde kırılma direncinin tespit edilmesidir. 50'şer alt premolar ve alt molar doğal diş 7 ve 18 mm'lik iki farklı gövde uzunluğu oluşturmak üzere akrilik bloklara gömüldü. İki farklı metal desteksiz restorasyon tipinde her gövde uzunluğu ve preperasyon biçimi için 5'er köprü retorasyonu hazırlandı. Ayrıca her gövde uzunluğu için kontrol grubu olarak tam kaplama metal-seramik restorasyonlar hazırlandı. Metal desteksiz restorasyonlar rezin siman ile metal-seramik restorasyonlar ise çinko fosfat siman ile yapıştırıldı. 5° C ve 55° C'de 5000 kez ısısal çevirim işlemini takiben örnekler dikey yükleme ile kırıldı. İstatistiksel analiz için Varyans Analizi ve 'Tukey's Multiple Range Test' kullanıldı. Deney grupları için elde edilen ortalama kırılma değerleri (N) ve standart sapma oranları aşağıdaki gibidir: 7mm. gövde18 mm. gövde Tam kaplamaİnley destekliTam kaplamaİnley destekli IPS Empress 2388.8 (61.4)480.6 (106.4)335.8 (44.9)404.0 (80.4) Adoro-Vectris1307.8 (217.9)1189.2 (199.0)1164.0 (158.0)1259.2 (241.5) Metal-seramik3457.2 (277.3)*921.0 (176.6)* Materyal ve gövde uzunluğuna göre sonuçlar istatistiksel olarak anlamlı farklılık gösterirken tutucu tipinin sonuçlara anlamlı etkisinin olmadığı belirlendi (P<0.005). En yüksek dayanıklılık değeri her iki gövde uzunluğunda da metal-seramik köprülerde elde edildi. Adoro-Vectris fiberle güçlendirilmiş kompozit esaslı restoratif materyal yüksek esneme direncine bağlı olarak hem inley hem de tam kron tutuculu köprülerde metal-seramik sisteme yakın bir kırılma direnci gösterdi. IPS Empress 2 tam seramik sistemi ise camsı yapısı dolayısıyla daha yüksek kırılganlığa sahip olduğu için farklı tutucularda ve farklı gövde uzunluklarında en düşük kırılma direnci değerini verdi.
Fracture resistance of adhesive metal-free fixed partial dentures: An in-vitro study The aim of this study was to determine the fracture strenghts of two metal-free fixed partial denture (FPD) materials (IPS Empress 2, Adoro-Vectris) in inlay-retained and full veneer retainer designs. 50 mandibular premolar and 50 mandibular molar teeth were embedded into acrylic resin with two different span lenghts (7 and 18mm). Five FPDs were constructed for each type of material on each span lenght and retainer design. Full veneer ceramo-metal FPDs on both span lenghts were used as control groups. Metal-free FPDs were luted with a resin cement while ceramo-metal FPDs were cemented conventionally. FPDs were vertically loaded until fracture following the thermocycling process (5000 times) that was performed between 5 and 55° C. Statistical analyses was performed using the Varience Analyses and the Tukey's Multiple Range Test. Mean fracture resistances and standart deviations of FPDs are presented in the following table: 7mm. span lenght18 mm. span lenght Full veneerInlay retainedFull veneerInlay retained IPS Empress 2388.8 (61.4)480.6 (106.4)335.8 (44.9)404.0 (80.4) Adoro-Vectris1307.8 (217.9)1189.2 (199.0)1164.0 (158.0)1259.2 (241.5) Ceramo-metal3457.2 (277.3)*921.0 (176.6)* Type of material and span lenght exibithed a significant influence on the fracture resistance regardless of the retainer type (P<0.005). Ceramo-metal FPDs showed the highest mean fracture resistance on boht span lenghts. Adoro-Vectris fiber reinforced FPDs showed close results to the ceramo-metal FPDs on both types of retainers, due to their high modulus of elasticity. IPS Empress 2 glass-ceramic FPDs exibithed the lowest fracture resistance on both span lenghts and each type of retainer.
Fracture resistance of adhesive metal-free fixed partial dentures: An in-vitro study The aim of this study was to determine the fracture strenghts of two metal-free fixed partial denture (FPD) materials (IPS Empress 2, Adoro-Vectris) in inlay-retained and full veneer retainer designs. 50 mandibular premolar and 50 mandibular molar teeth were embedded into acrylic resin with two different span lenghts (7 and 18mm). Five FPDs were constructed for each type of material on each span lenght and retainer design. Full veneer ceramo-metal FPDs on both span lenghts were used as control groups. Metal-free FPDs were luted with a resin cement while ceramo-metal FPDs were cemented conventionally. FPDs were vertically loaded until fracture following the thermocycling process (5000 times) that was performed between 5 and 55° C. Statistical analyses was performed using the Varience Analyses and the Tukey's Multiple Range Test. Mean fracture resistances and standart deviations of FPDs are presented in the following table: 7mm. span lenght18 mm. span lenght Full veneerInlay retainedFull veneerInlay retained IPS Empress 2388.8 (61.4)480.6 (106.4)335.8 (44.9)404.0 (80.4) Adoro-Vectris1307.8 (217.9)1189.2 (199.0)1164.0 (158.0)1259.2 (241.5) Ceramo-metal3457.2 (277.3)*921.0 (176.6)* Type of material and span lenght exibithed a significant influence on the fracture resistance regardless of the retainer type (P<0.005). Ceramo-metal FPDs showed the highest mean fracture resistance on boht span lenghts. Adoro-Vectris fiber reinforced FPDs showed close results to the ceramo-metal FPDs on both types of retainers, due to their high modulus of elasticity. IPS Empress 2 glass-ceramic FPDs exibithed the lowest fracture resistance on both span lenghts and each type of retainer.