Burak Dayı - Academia.edu (original) (raw)

Papers by Burak Dayı

Research paper thumbnail of Düşük Poli̇meri̇zasyon Büzülmesi̇ Gösteren Modern Kompozi̇tler İle Metakri̇lat Esasli Rezi̇n Kompozi̇ti̇n Konversi̇yon Oranlarinin Değerlendi̇ri̇lmesi̇

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi, 2015

Bu in-vitro çalışmanın amacı üç farklı rezin kompozitin konversiyon oranlarının belirlenmesidir. ... more Bu in-vitro çalışmanın amacı üç farklı rezin kompozitin konversiyon oranlarının belirlenmesidir. Gereç ve Yöntem: Bu çalışmada üç farklı rezin kompozit değerlendirildi; bir geleneksel metakrilat esaslı kompozit (Premise, Kerr, Orange, CA, ABD), bir siloran esaslı kompozit (Filtek Silorane, 3M ESPE, St.Paul. MN, ABD) ve yeni bir düşük polimerizasyon özelliğine sahip kompozit (GC Kalore, GC Europe, Leuven, Belçika). Kompozit örneklerinin konversiyon oranlarının ölçümleri bir FTIR spektroskopi (Perkin Elmer Spectrum One, MA, ABD) ile yapıldı. Tüm kompozit rezin örnekleri için FTIR ölçümleri, örnekler polimerize edilmeden önce ve örnekler polimerize edildikten sonra gerçekleştirildi. Bulgular: Siloran esaslı kompozit Filtek Siloran (%58,60), istatistiksel olarak anlamlı bir şekilde Premise (%44,65) ve Kalore'den (%44,53) daha yüksek konversiyon oranı gösterdi. Sonuç: Rezin kompozitlerin konversiyon oranı monomer yapılarına bağlı olarak değişebilmektedir ve siloran esaslı kompozitler daha iyi polimerize olabilmektedir. Anahtar Kelimeler: Konversiyon oranı, düşük polimerizasyon büzülmesine sahip kompozitler, FTIR GİRİŞ Rezin kompozit ürünlerindeki önemli gelişmelere rağmen rezin kompozitler günümüzde, hala yetersiz konversiyon-dönüşüm oranına ve buna bağlı ABSTRACT Purpose: The purpose of this in-vitro study was to determine the degree of conversion of three different composite materials. Material and Methods: In this study three composite materials were analyzed; a traditional methacylate-based composite (Premise, Kerr, Orange, CA, USA), a silorane-based composite (Filtek Silorane, 3M ESPE, St.Paul. MN, USA) and a novel low-shrinking composite (GC Kalore, GC Europe, Leuven, Belgium). Degree of conversion was measured on the composite with FTIR spectroscopy (Perkin Elmer Spectrum One, MA, USA). FTIR analyses were performed at the prepolymerization and post-polymerization stages of tested materials. Results: The silorane-based novel composite resin Filtek Silorane (58,60%) showed significantly higher conversion degree when compared to Premise (44,65%) and Kalore (44,53%). Conclusion: The conversion degree of resin composite might depend on monomer structure and siloranbased composite polymerized better than other tested composites.

Research paper thumbnail of Comparative analysis of three different filling techniques and the effects of experimental internal resorptive cavities on apical microleakage

European Journal of Dentistry, 2014

Objectives: The aim of this study was to evaluate the sealing abilities of three different gutta-... more Objectives: The aim of this study was to evaluate the sealing abilities of three different gutta-percha techniques in experimentally defective roots (EDR) and non-defective roots (NR). Materials and Methods: Sixty canine teeth were divided into six groups of ten; Group 1, NR + cold lateral condensation (CLC); Group 2, EDR + LC; Group 3, NR + BeeFill; Group 4, EDR + BeeFill; Group 5, NR + Thermafil; and Group 6, EDR + Thermafil. Apical leakage was measured using a computerized fluid filtration meter with a laser system. Results: Statistical analysis revealed that the CLC demonstrated more microleakage in the EDR than in the NR (P < 0.01). Thermafil demonstrated more microleakage in the NR than in the EDR (P < 0.01). No statistically significant differences were found between the BeeFill groups (P > 0.05). Conclusions: The results of this study indicate that internal resorptive cavities can affect the apical sealing properties of different root canal filling techniques, with ...

Research paper thumbnail of Evaluation of a collagen-bioaggregate composite scaffold in the repair of sheep pulp tissue

European Oral Research, 2021

Purpose This study aimed to compare the effects of the collagen-BioAggregate mixture (CBA-M) and ... more Purpose This study aimed to compare the effects of the collagen-BioAggregate mixture (CBA-M) and collagen-BioAggregate composite (CBA-C) sponge as a scaffolding material on the reparative dentin formation. Materials and Methods CBA-C sponge (10:1 w/w) was obtained and characterized by Scanning Electron Microscopy (SEM) and Mercury Porosimetry. Cytotoxicity of the CBA-C sponge was tested by using the L929 mouse fibroblast cell line. Dental pulp stem cells (DPSCs) were isolated from the pulp tissue of sheep teeth and characterized by flow cytometry for the presence of mesenchymal stem cell marker, CD44. The osteogenic differentiation capability of isolated DPSCs was studied by Alizarin Red staining. The cells were then used to study for the compatibility of CBA-C sponge with cell proliferation and calcium phosphate deposition. The effect of CBA-C sponge and CBA-M on the induction of dentin regeneration was studied in the perforated teeth of sheep for the eight-week period. All the analyses were performed with appropriate statistical hypothesis tests. Results CBA-C sponge was found to be biocompatible for DPSCs. The DPSCs seeded on the CBA-C sponge were able to differentiate into the osteoblastic lineage and deposit calcium phosphate crystals in vitro. Reparative dentin formation was observed after the second week in the CBA-C sponge applied group. At the end of eight weeks, a complete reparative dentin structure was formed in the CBA-C sponge applied group, whereas necrotic tissue residues were observed in groups treated with the CBA-M. Conclusion CBA-C sponge represents a better microenvironment for reparative dentin formation probably due to maintaining DPSCs and allowing their osteogenic differentiation and thus calcium phosphate deposition.

Research paper thumbnail of Düşük Poli̇meri̇zasyon Büzülmesi̇ Gösteren Modern Kompozi̇tler İle Metakri̇lat Esasli Rezi̇n Kompozi̇ti̇n Konversi̇yon Oranlarinin Değerlendi̇ri̇lmesi̇

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi, 2015

Bu in-vitro çalışmanın amacı üç farklı rezin kompozitin konversiyon oranlarının belirlenmesidir. ... more Bu in-vitro çalışmanın amacı üç farklı rezin kompozitin konversiyon oranlarının belirlenmesidir. Gereç ve Yöntem: Bu çalışmada üç farklı rezin kompozit değerlendirildi; bir geleneksel metakrilat esaslı kompozit (Premise, Kerr, Orange, CA, ABD), bir siloran esaslı kompozit (Filtek Silorane, 3M ESPE, St.Paul. MN, ABD) ve yeni bir düşük polimerizasyon özelliğine sahip kompozit (GC Kalore, GC Europe, Leuven, Belçika). Kompozit örneklerinin konversiyon oranlarının ölçümleri bir FTIR spektroskopi (Perkin Elmer Spectrum One, MA, ABD) ile yapıldı. Tüm kompozit rezin örnekleri için FTIR ölçümleri, örnekler polimerize edilmeden önce ve örnekler polimerize edildikten sonra gerçekleştirildi. Bulgular: Siloran esaslı kompozit Filtek Siloran (%58,60), istatistiksel olarak anlamlı bir şekilde Premise (%44,65) ve Kalore'den (%44,53) daha yüksek konversiyon oranı gösterdi. Sonuç: Rezin kompozitlerin konversiyon oranı monomer yapılarına bağlı olarak değişebilmektedir ve siloran esaslı kompozitler daha iyi polimerize olabilmektedir. Anahtar Kelimeler: Konversiyon oranı, düşük polimerizasyon büzülmesine sahip kompozitler, FTIR GİRİŞ Rezin kompozit ürünlerindeki önemli gelişmelere rağmen rezin kompozitler günümüzde, hala yetersiz konversiyon-dönüşüm oranına ve buna bağlı ABSTRACT Purpose: The purpose of this in-vitro study was to determine the degree of conversion of three different composite materials. Material and Methods: In this study three composite materials were analyzed; a traditional methacylate-based composite (Premise, Kerr, Orange, CA, USA), a silorane-based composite (Filtek Silorane, 3M ESPE, St.Paul. MN, USA) and a novel low-shrinking composite (GC Kalore, GC Europe, Leuven, Belgium). Degree of conversion was measured on the composite with FTIR spectroscopy (Perkin Elmer Spectrum One, MA, USA). FTIR analyses were performed at the prepolymerization and post-polymerization stages of tested materials. Results: The silorane-based novel composite resin Filtek Silorane (58,60%) showed significantly higher conversion degree when compared to Premise (44,65%) and Kalore (44,53%). Conclusion: The conversion degree of resin composite might depend on monomer structure and siloranbased composite polymerized better than other tested composites.

Research paper thumbnail of Comparative analysis of three different filling techniques and the effects of experimental internal resorptive cavities on apical microleakage

European Journal of Dentistry, 2014

Objectives: The aim of this study was to evaluate the sealing abilities of three different gutta-... more Objectives: The aim of this study was to evaluate the sealing abilities of three different gutta-percha techniques in experimentally defective roots (EDR) and non-defective roots (NR). Materials and Methods: Sixty canine teeth were divided into six groups of ten; Group 1, NR + cold lateral condensation (CLC); Group 2, EDR + LC; Group 3, NR + BeeFill; Group 4, EDR + BeeFill; Group 5, NR + Thermafil; and Group 6, EDR + Thermafil. Apical leakage was measured using a computerized fluid filtration meter with a laser system. Results: Statistical analysis revealed that the CLC demonstrated more microleakage in the EDR than in the NR (P < 0.01). Thermafil demonstrated more microleakage in the NR than in the EDR (P < 0.01). No statistically significant differences were found between the BeeFill groups (P > 0.05). Conclusions: The results of this study indicate that internal resorptive cavities can affect the apical sealing properties of different root canal filling techniques, with ...

Research paper thumbnail of Evaluation of a collagen-bioaggregate composite scaffold in the repair of sheep pulp tissue

European Oral Research, 2021

Purpose This study aimed to compare the effects of the collagen-BioAggregate mixture (CBA-M) and ... more Purpose This study aimed to compare the effects of the collagen-BioAggregate mixture (CBA-M) and collagen-BioAggregate composite (CBA-C) sponge as a scaffolding material on the reparative dentin formation. Materials and Methods CBA-C sponge (10:1 w/w) was obtained and characterized by Scanning Electron Microscopy (SEM) and Mercury Porosimetry. Cytotoxicity of the CBA-C sponge was tested by using the L929 mouse fibroblast cell line. Dental pulp stem cells (DPSCs) were isolated from the pulp tissue of sheep teeth and characterized by flow cytometry for the presence of mesenchymal stem cell marker, CD44. The osteogenic differentiation capability of isolated DPSCs was studied by Alizarin Red staining. The cells were then used to study for the compatibility of CBA-C sponge with cell proliferation and calcium phosphate deposition. The effect of CBA-C sponge and CBA-M on the induction of dentin regeneration was studied in the perforated teeth of sheep for the eight-week period. All the analyses were performed with appropriate statistical hypothesis tests. Results CBA-C sponge was found to be biocompatible for DPSCs. The DPSCs seeded on the CBA-C sponge were able to differentiate into the osteoblastic lineage and deposit calcium phosphate crystals in vitro. Reparative dentin formation was observed after the second week in the CBA-C sponge applied group. At the end of eight weeks, a complete reparative dentin structure was formed in the CBA-C sponge applied group, whereas necrotic tissue residues were observed in groups treated with the CBA-M. Conclusion CBA-C sponge represents a better microenvironment for reparative dentin formation probably due to maintaining DPSCs and allowing their osteogenic differentiation and thus calcium phosphate deposition.