Yeditepe J Dent. 2021; 17(2): 91-96 | DOI: 10.5505/yeditepe.2021.59489

Farklý teknikler kullanýlarak fiberle güçlendirilen kompozit rezinlerin makaslama baðlanma dayanýmýnýn deðerlendirilmesi

Burcu Oðlakçý¹, Duygu Tuncer², Derya Merve Halaçoðlu³, Neslihan Arhun^4
1Bezmialem Vakýf Üniversitesi, Diþ Hekimliði Fakültesi, Restoratif Diþ Tedavisi AD, Ýstanbul
²Özel Klinik, Mustafa Kemal mah.2129 sok. 1/3 Çankaya, Ankara
³Yeditepe Üniversitesi, Diþ Hekimliði Fakültesi, Restoratif Diþ Tedavisi AD, Ýstanbul
⁴Baþkent Üniversitesi Diþ Hekimliði Fakültesi, Restoratif Diþ Tedavisi AD, Ankara

GÝRÝÞ ve AMAÇ: Bu çalýþmanýn amacý, fiberle güçlendirilen kompozit rezinlerin dentine olan makaslama baðlanma dayanýmýný deðerlendirmektir.
YÖNTEM ve GEREÇLER: 30 adet anonimize saðlam insan molar diþi kullanýlmýþtýr. Diþlerin bukkal ve lingual yüzeyleri, düzgün bir dentin yüzeyi elde etmek için 120- ve 600- gritlik silikon karbid kaðýtlarla standart smear tabakasý elde etmek için su soðutmasý altýnda aþýndýrýlmýþtýr. Ardýndan, fosforik asit ve adeziv sistem uygulanmýþtýr. Örnekler, kullanýlan fiberin ve kompozit rezinin tipine göre rastgele 5 gruba ayrýlmýþtýr (n=12). Grup FZ+PF: mikrohibrit kompozit rezin+polietilen fiber; Grup FZ: mikrohibrit kompozit; Grup EP: kýsa fiberle güçlendirilen kompozit; Grup SR+PF: akýþkan bulk fill kompozit+polietilen fiber; Grup SR: akýþkan bulk fill kompozit. Kompozit rezinler, 3 mm çap ve 4 mm yükseklikte silindir þekilde silikon kalýplar kullanýlarak baðlanmýþtýr. Örnekler, 24 saat distile suda bekletilmiþ ve ardýndan 1mm/dk piston baþlýðý hýzýnda universal test cihazý kullanýlarak makaslama baðlanma dayaným testi uygulanmýþtýr. Kýrýk yüzeylerin baþarýsýzlýk analizi, 15x büyütmede stereomikroskopla incelenmiþtir. Veriler, tek yönlü varyans analizi ve Tukey testi kullanýlarak deðerlendirilmiþtir (p<0,05).
BULGULAR: Grup SR (akýþkan bulk fill kompozit), Grup SR+PF (akýþkan bulk fill kompozit+polietilen fiber)’e kýyasla istatistiksel olarak daha yüksek makaslama baðlanma dayanýmý göstermiþtir(p<0,05). Diðer gruplar arasýnda istatistiksel olarak makaslama baðlanma dayanýmý açýsýndan fark görülmemiþtir( p>0,05). Grup FZ (mikrohibrit kompozit), Grup EP (kýsa fiberle güçlendirilen kompozit) ve Grup SR (akýþkan bulk fill kompozit) karma tip baþarýsýzlýk gösterirken; Grup FZ+PF (mikrohibrit kompozit+polietilen fiber) ve Grup SR+PF (akýþkan bulk fill kompozit+ polietilen fiber) adeziv tip baþarýsýzlýk göstermektedir.
TARTIÞMA ve SONUÇ: Akýþkan bulk fill kompozit rezinin makaslama baðlanma dayaným deðerleri, polietilen fiberle güçlendirilen akýþkan bulk fill kompozitlere kýyasla daha yüksektir.

Anahtar Kelimeler: Dentin, fiber, kompozit rezin, makaslama baðlanma dayanýmý

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The evaluation of shear bond strength of resin composite with different reinforcement techniques

Burcu Oðlakçý¹, Duygu Tuncer², Derya Merve Halaçoðlu³, Neslihan Arhun^4
1Bezmialem Vakif University Faculty of Dentistry Department of Restorative Dentistry, Ýstanbul
²Private Dental Clinic,Mustafa Kemal mah. 2129 sok. 1/3 Çankaya, Ankara
³Yeditepe University Faculty of Dentistry Department of Restorative Dentistry, Ýstanbul
⁴Baþkent University Faculty of Dentistry Department of Restorative Dentistry, Ankara

INTRODUCTION: Aim of this study was to evaluate the effect of different fiber-reinforced resin composites on the shear bond strength to dentine.
METHODS: 30 anonymized sound human molar teeth’s teeth were used. Buccal and lingual surfaces were ground with 120- and 600-grit silicon carbide paper to obtain standard smear layers on dentine under water cooling. Then, phosphoric acid and adhesive system were applied. Specimens were randomly divided into 5 groups according to the type of fiber and resin composites used (n=12): Group FZ+PF: microhybrid resin composite+polyethylene fiber; Group FZ: microhybrid composite; Group EP: short fiber-reinforced composite; Group SR+PF: flowable bulk-fill composite+polyethylene fiber; Group SR: flowable bulk-fill composite. Resin composites were bonded using cylinder-shaped silicone mold (diameter: 3 mm, height: 4 mm). The specimens were stored in distilled water for 24 h and subjected to shear bond strength test at a crosshead speed of 1 mm/ min using universal testing machine. Debonded surfaces were observed with a steremicroscope under 15x magnification to determine mode of failure. Data were statistically analyzed with one-way variance analysis and Tukey test(p<0.05).
RESULTS: Group SR (flowable bulk-fill composite) showed statistically higher shear bond strength than Group SR+PF (flowable bulk-fill composite+polyethylene fiber) (p<0,05). There were no significant differences in shear bond strength among other groups(p>0,05). Group FZ (microhybrid composite), Group EP (short fiber-reinforced composite) and Group SR (flowable bulk-fill composite) showed predominantly mixed failures while Group FZ+PF(microhybrid resin composite+polyethylene fiber) and Group SR+PF (flowable bulk-fill composite+ polyethylene fiber) showed adhesive failures patterns.
DISCUSSION AND CONCLUSION: Flowable bulk-fill composites showed higher shear bond strength than the ones reinforced with polyethylene fiber.

Keywords: Dentine, fiber, composite resin, shear bond strength

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