14 research outputs found
The Effect of Finishing and Polishing Systems on Surface Roughness, Microhardness and Microleakage of a Nanohybrid Composite
Farklı Yerleştırme Teknıklerının ve Işınlama Sürelerının Rezın Kompozıtlerın Mikrosertliği Üzerıne Etkısının İncelenmesı
Giriş ve Amaç: Tek kitle (bulk-fill) rezin kompozitler, tabakalama tekniği ile uygulanan rezin kompozitlere göre avantajları nedeniyle tercih edilmektedir. Çalışmamızın amacı, farklı yerleştirme tekniklerinin ve ışınlama sürelerinin rezin kompozitlerin mikrosertliği üzerine etkisinin incelenmesidir. Yöntem ve Gereçler: Çalışmada, üç farklı tek kitle kompozit materyali (Grup-1: Tetric Evo Ceram (Ivoclar Vivadent, Schaan- Liechteinstein), Grup-2: Quixfill (Dentsply De Trey, Konstaz-Germany), Grup-3: Ever X Posterior (GC Corp., Tokyo-Japan)) ve bir konvansiyonel tabakalama tekniği ile uygulanan kompozit materyali (Grup-4: Tetric N Ceram (Ivoclar Vivadent, Schaan- Liechteinstein)) kullanıldı. Her grup için hazırlanan 14 örnek, ışınlama süresine (20s/40s) göre 2 gruba ayrıldı. Kompozitlerin mikrosertlik değerleri ölçümü, örneklerin alt ve üst yüzeylerinden gerçekleştirildi. İstatistiksel değerlendirme ANOVA, t-testi ve Bonferroni Post-hoc testleri ile yapıldı. Bulgular: Grup-2’nin alt ve üst yüzeyinden elde edilen mikrosertlik değerlerinin, her iki ışınlama süresinde diğer gruplara göre yüksek olduğu saptandı. En düşük mikrosertlik değerleri Grup-4’te elde edildi (p<0,05). Tüm gruplarda, ışınlama süresi ile materyallerin alt ve üst yüzeylerinden elde edilen mikrosertlik değerleri arasında pozitif korelasyon tespit edildi (p<0,05). Tartışma ve Sonuç: Bulk-fill kompozit materyallerin mikrosertlik değerlerinin tabakalama tekniği ile uygulanan materyale göre anlamlı düzeyde yüksek olduğu dikkate alınarak özellikle pedodonti kliniklerinde tercih edilebileceği düşünülmektedir
Association of mutation in PTPN14 gene and gingival fibromatosis with distinctive facies: a novel finding in whole exome sequencing
Gingival fibromatosis with distinctive facies presents a rare clinical picture. It is characterized by gingival fibromatosis in conjunction with some craniofacial dysmorphic features such as relative macrocephaly, bushy eyebrows, synophrys, hypertelorism, downslanting palpebral fissures, flattened nasal bridge, hypoplastic nares, cupid-bow mouth and a high palate. Autosomal recessive inheritance has been suggested. However, to date, no causative gene has been reported. Herein, we report a case presenting with the typical findings of this rare genetic syndrome. A homozygous c.1855C>T (p.Gln619Ter) mutation in the PTPN14 gene was identified
When Is the Root of All Evil Not Money? The Impact of Load on Operational Risk at a Commercial Bank
Operational risk is now among the three most significant types of risks in the financial services industry, and its management is mandated by Basel II regulation. This paper studies how bank operational risk event frequency (or error rate) and severity (
Potential effects of a multistrain probiotic-kefir on salivary Streptococcus mutans and Lactobacillus spp.
WOS: 000282671700005Background/purpose: It has recently been documented that various probiotic formulations have beneficial effects in reducing caries risk as well as promoting human health. The aim of the present study was to examine the efficacy of short-term consumption of a multistrain probiotic-kefir on salivary counts of Streptococcus mutans and Lactobacillus spp. in young adults. Materials and methods: In total, 104 subjects aged 20-27 years were included in the study. The salivary flow rate, buffer capacity, salivary mutans streptococci and lactobacilli counts were detected in each subject after a 3-week washout period using chair-side kits at baseline. Subjects were randomly assigned into three groups: Group I consumed 100 mL kefir per day (n=35); Group II consumed 2 x 100 mL kefir per day (n=35); and Group III consumed 100 mL milk (n=34). A questionnaire investigating the oral and dietary habits of the subjects was also filled out by each subject. After 3 weeks of consumption of the experimental materials, salivary mutans streptococci and lactobacilli counts were reevaluated. Results: Statistically significant reductions were observed in both salivary mutans streptococci and lactobacilli in Group II compared to the baseline (P = 0.001 and P = 0.01, respectively). Conclusion: Short-term consumption of kefir might reduce high levels of salivary mutans streptococci and lactobacilli