8 research outputs found

    Effect of Xylitol Lozenge on Remineralization of Artificial Carious Lesions - In Situ

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    The purpose of this study was to evaluate the effect of lozenges containing xylitol on in situ remineralization of artificial carious lesions. Eleven patients (aged between 12 and 15 years old) treated by fixed orthodontic therapy with bilateral maxillary first premolar extractions were included into this study. Each subject wore a modified transpalatal arch that was prepared by adding an acrylic resin to the U region for positioning of the enamel blocks (4X4X3 mm) on it. Three enamel blocks were prepared from the extracted tooth of each patient for both control and experimental groups. Artificial caries lesions were prepared by a low pH solution. This was a two stages study of 14 day periods: no-lozenge and xylitol lozenge (5 times/day, after meals). After each stage, the surface enamel microhardness testing was performed using a Vickers Hardness Tester. Three penetrations were made with a load of 300 g for 15 seconds into the enamel. Friedman's test was used for statistical analyses. The microhardness values were 197.5±127.3, 185.2±106.7, 193.2± 103.4 kgf/mm2 for control, no-lozenge and xylitol groups, respectively. Microhardness results demonstrated that there were no statistically significant differences between amount of remineralization in the control and experimental groups. The results showed that xylitol lozenge was not effective on in situ remineralization of artificial carious lesions but at least non-cariogenic

    Effects of obesity on salivary PH, buffering capacity and dental caries incidence

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    Amaç: Bu çalışmanın amacı obez ve morbid obez hastaların tükürük pHsı tamponlama kapasitesi ve DMF-T indeks değerlerini sağlıklı bireylerle karşılaştırmaktır. Gereç ve yöntem: Çalışmaya vücut kütle indeksi (VKİ) (Body Mass Index) 30 olan ve yaş ortalaması 45.6 olan 34 obez bayan ile, VKİsı 19-25 olan ve yaş ortalaması 41 olan 12 sağlıklı bayan gönüllü olarak katıldı. Obez gruptaki bireyler ayrıca 15 birey obez (VKİ 39.9) grup, 19 birey (VKİ 40) morbid obez grup olmak üzere iki alt gruba ayrıldı. Her bireyin uyarılmamış tü- kürükleri biriktirildikten sonra tükürük pHları ve tamponlama kapasiteleri ölçüldü. Ağız içi muayeneleri ise DSÖ (Dünya Sağlık Örgütü) kriterlerine göre yapıldı ve DMF-T indeks değerleri kaydedildi. Bulgular: İstatistiksel analiz sonucuna göre; ortalama tükürük pH, tamponlama kapasitesi, ve DMF-T indeks değerleri obez grupta; 6.980.4, 3.910.8, 12.737.65, morbid obez grupta; 6.980.25, 4.14 1.12, 118.39, ve kontrol grubunda; 6.95 0.43, 3.480.5, 9.25 6.77 olarak elde edildi. Bu çalışmada sağlıklı bireylerle obez bireyler arasında tükürük pHsı ve tamponlama kapasitesi yönünden herhangi bir fark olmadığı gözlendi. Ayrıca kontrol grubu ile obez grupların DMF-T indeksleri arasında da bir fark olmadığı bulundu. Sonuç: Sonuç olarak obezitenin tükürük pHsı, tamponlama kapasitesi ve çürük insidansı üzerine herhangi bir etkisinin olmadığı tespit edildi.Background: The salivary pH, buffering capacity and DMF-T index of obese and morbide obese patients were compared with those of healthy controls. Methods: Test group of this study was consisted of thirty four volunteers (mean age 45.60) obese women patients with Body Mass Index (BMI)≥30 and control group was consisted of twelve healthy volunteers (mean age of 41) nonobese women patients with BMI between 19-25. Obese patients were divided in two subgroup; fifteen patients as obese group (BMI0.05). Conclusion: As a result of this study, it was suggested that obesity could not influence the salivary pH, buffering capacity and caries indices

    MDP monomer içeren adeziv sistemlerin rekabeti: Makaslama bağ dayanımlarının karşılaştırılması

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    Amaç: Bu in - vitro çalışmanın amacı MDP monomeri içeren üç farklı self- etch adeziv sistemin makaslam a bağ dayanımınlarını değerlendirmektir. Materyal ve Metod: Bu çalışma için atmış adet çekilmiş insan üçüncü molar dişl eri kullanlmıştır. Dişler bir elmas kesme diski yardımıyla ve su soğutması altında kron boylarının orta üçlülerine kadar kesilmiştir. Kesilen dişler rastgele üç gruba ayrılmıştır (n20). Ultradent Bonding Jig yardımıyla ve üç farklı MDP içeren self-etch ad eziv sis tem kullanılarak restorasyonlar yapılmıştır (2,30 mm çap ve 3mm yükseklik). Sonrasında örnekler test cihazına alınmış ve makaslama bağlanma değerleri ölçülmüştür. Bulgu lar: 1. Ve 2. Grup restorasyonlar, 3. Gruba göre anlamlı derecede daha yüksek ma kaslama bağ değeri gösterdi. (p0.05). Bunun yanında 1. Grubun 2. Gruba göre nispeten daha yüksek bağ değeri gösterdiği saptandı. Sonuç: Bu in -vitro çalışmanın sonuçlarına göre, bütün grupların optimal bağ değerlerigösterdiği saptandı. Ancak 1 . ve 2. Gruplar 3. Gruba oranla anlamlı derecede daha iyi bağlanma değerleri gösterdi.Aim: The aim of this in vitro study was to evaluate the shear bond strengths of three MDP monomer containing self-etch adhesive system s. Material and method: Sixty human third molars were used for the study. The teeth were sectioned with a low -speed diamond disk saw under water coolant to expose mid -coronal dentin. The teeth were randomly divided into three groups( n20). The restoration s (2.30mm diameter and 3mm heigh) builded with using three different MDP containing adhesive systems by aid of Ultradent Bonding Jig. After that, the specimens were placed in a universal testing machine and the shear bond strength was measured at a crosshe ad speed of 1 mm/min. Result : Group 1 and 2 showed significantly higher bond strength than group 3(p0.05) in spite of group 1 showed slightly higher bond strength values than group 2. Conclusion: Within the limitations of this in -vitro study, all groups showed optimal results but first and second adhesives showed significantly higher values than third group

    Cytotoxicity Testing of Temporary Luting Cements with Two- and Three-Dimensional Cultures of Bovine Dental Pulp-Derived Cells

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    This study evaluated the cytotoxicity of eugenol-containing and eugenol-free temporary luting cements. For cytotoxicity testing, bovine pulp-derived cells transfected with Simian virus 40 Large T antigen were exposed to extracts of eugenol-containing (Rely X Temp E) and eugenol-free (Provicol, PreVISION CEM, and Rely X Temp NE) temporary luting cements for 24 h. The cytotoxicity of the same materials was also evaluated in a dentin barrier test device using three-dimensional cell cultures of bovine pulp-derived cells. The results of the cytotoxicity studies with two-dimensional cultures of bovine dental pulp-derived cells revealed that cell survival with the extracts of Rely X Temp E, Provicol, PreVISION CEM, and Rely X Temp NE was 89.1%, 84.9%, 92.3%, and 66.8%, respectively. Rely X Temp NE and Provicol showed cytotoxic effects on bovine dental pulp-derived cells (). The results of the dentin barrier test revealed that cell survival with the above-mentioned temporary cement was 101.5%, 91.9%, 93.5%, and 90.6%, respectively. None of the temporary luting cements significantly reduced cell survival compared with the negative control in the dentin barrier test (). Biologically active materials released from temporary luting cements may not influence the dentine-pulp complex if the residual dentine layer is at least 0.5 mm thick

    Influence of caries detection dye on composites bond strength of carious affected dentin

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    Amaç: Bu çalış manın amacı 3 farklı çürük tespit boyasının, çürükten etkilenmiş dentinde bir adeziv sistemin makaslanma bağ lanma dayanımına olan etkilerinin incelenmesidir. Gereç ve Yöntem: Bu çalış mada 60 adet çekilmiş çürüklü insan 3. molar diş i kullanıldı. Okluzal yüzeyler düz bir dentin yüzeyi elde etmek için kaldırıldı ve akrilik kalıplar içerisine yerleş tirildi. Örnekler 15’er diş ten oluş acak ş ekilde 4 gruba ayrıldı ve 3 farklı çürük tespit boyası test edildi. İlk grup kontrol grubu ve diğ er gruplar Caries Detector, Quadrant Cari Test, Sable Seek grubu olarak belirlendi. Kontrol grubunda herhangi bir çürük tespit boyası uygulanmadan çürük dentin dokusu 300 gridlik silikon karbit zımparayla kaldırıldı. Diğ er gruplarda ise çürük dentin dokusu, çürük tespit boyası uygulandıktan sonra 300 gridlik silikon karbit zımparayla kaldırıldı. Çürüğ ü uzaklaş tırılan tüm önekler 600 gridlik zımpara ile aş ındırıldı. Daha sonra dentin bonding sistemi Clearfil SE Bond uygulandı ve örnekler kompozit rezin ile restore edildi. Bütün uygulamalar üretici firma tavsiyelerine uyularak gerçekleş tirildi. Bağ lanma dayanımı test edildi ve verilerin istatistiksel analizi tek yönlü varyans analizi ve Post Hoc Tukey testi kullanılarak yapıldı. Bulgular: Bu çalış manın sonuçlarına göre Quadrant Cari Test uygulanan örnekler diğ er çürük tespit boyası uygulananlara göre daha düş ük bağ lanma dayanımı gösterdi. Caries Detector ve Sable Seek uygulanan örnekler benzer bağ lanma dayanımı gösterirken bu iki çürük tespit boyası uygulanan örnekler Quadrant Cari Test’ten anlamlı derecede daha yüksek bağ lanma dayanımı gösterdi. Sonuçlar: Bu in-vitro çalış manın sonuçlarına göre çürük tespit boyaları çürükten etkilenmiş dentinde daha yüksek bağ lanma dayanımı elde edilmesine neden olabilmektedir.Objectives: The aim of this in vitro study was to evaluate effect of three different caries detecting dyes on shear bond strength of a self etch adhesive to caries affected dentin. Materials and Methods: 60 extracted human third molars which are affected by caries used in this study. Occlusal surfaces removed to obtain flat dentinal surfaces and teeth mounted acrylic. Specimens were divided into four groups of 15 to be tested three different caries detecting dyes. First group is control and others Caries Detector, Quadrant Cari Test, Sable Seek groups. In control group decayed dentine tissues remowed with silicon carbite papers (300 gride) and in others groups caries detectors applied and carious dentine tissues remowed with silicon carbite papers. Than dentin bonding systems Clearfil SE Bond applied and specimens restorated with composite resin. All products were used according to manufacturer’s instructions. Bond strengths were tested and data were statistically analyzed one-way Analysis of Variance (ANOVA) and Tukey tests. Results: As results of this study, Quadrant Cari Test group showed lower bond strength than other detecting dyes groups. While bond strengths of Caries Detector and Sable Seek groups were similar, their bond strengths were significantly higher than Quadrant Cari Test group (p<0,05). Conclusions: According to the results of this in vitro study caries detecting dyes may lead to increased shear bond strength values obtained

    Cytotoxicity evaluation of luting resin cements on bovine dental pulp-derived cells (bDPCs) by real-time cell analysis

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    SENGUN, Abdulkadir/0000-0002-6053-160XWOS: 000355962800003PubMed: 25736260To evaluate the cytotoxicity of resin cements on dental pulp-derived cells (bDPCs), Bifix QM (BQM), Choice 2(C2), RelyX U200(RU200), Maxcem Elite(ME), and Multilink Automix(MA) were tested. The materials were incubated in DMEM for 72 h. A real-time cell analyzer was used to evaluate cell survival. The statistical analyses used were one-way ANOVA and Tukey-Kramer tests. BQM, RU200, and ME demonstrated a significant decrease in the bDPCs' index at 24 and 72 h (p <= 0.001). These materials were found to be the most toxic resin cements, as compared to the control and other tested materials (C2 and MA). However, C2 and MA showed a better survival rate, compared to BQM, RU200, and ME, and had lower cell index than the control group. The cytotoxic effects of resin cements on pulpa should be evaluated during the selection of proper cements
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