Comparison of microtensile bond strength of two different bonding systems on eroded enamel

Amaç: Dental erozyon geri dönüşümü olamayan, çürüksüz sert doku kaybıdır. Ağız ortamında bulunan iç ya da dış kaynaklı asitler dental erozyonun ana etyolojik faktörüdür. Başta mine dokusu olmak üzere diğer diş sert dokuları da asitlerden etkilenerek çözünmeler gösterebilmektedir. Aynı zamanda bu çözünme sonucu restorasyonun diş dokusuna bağlanması da etkilenmektedir. Bu çalışmada normal ve erozyona uğramış mine dokusuna uygulanan farklı universal bonding sistemlerin mikrogerilme bağlanma dayanımları incelenmiştir. Gereç ve Yöntem: Portakal suyunda bekletilerek yapay erozyon oluşumu sağlanan mine yüzeyleri ve sağlam mine yüzeylerinde bir Univeral Bonding Sistem birde totaletch olarak uygulanan bonding sistemin mikrogerilme bağlanma dayanımları karşılaştırılmıştır.Bulgular: En yüksek bağlanma dayanım değeri Single Bond Universal kullanılan sağlam mine yüzeyli grupta çıkarken en düşük değerler Single Bond 2'nin kullanıldığı erozyonlu grupta görülmüştür.Sonuçlar: Elde edilen sonuçlara göre erozyona uğramış dişlerde mikro gerilme bağlanma değerleri istatistiksel olarak anlamlı derecede düşük çıkmıştır.Aim: Dental erosion is loss of hard tissues on tooth surface with an irreversibl, non-carious lesion. Main ethiological factor of this hard tissue loss is extrinsic and intrinsic acids. Not only the enamel but also the other hard tissues of tooth can be dissolved by these acids. This dissolution process is also effect the bonding of restoration materials to the tooth structures. During the treatment procedures, different restoration materials can be used as an alternative approach. In this study, microtensile bond strength of different universal bonding systems on eroded and sound enamel tissue is evaluated. Materials and Method: Orange juice was used to make artificial erosion lesions on two groups. A universal bonding system and a total-etch system were used to evaluate the microtensile bond strength on both eroded and sound enamel.Results: While, the highest microtensile bond values are obtained in Single Bond Universal used on sound enamel group. In the Single Bond 2 used eroded enamel group has shown the lowest bonding values.Conclusions: According to the results, the microtensile bond strength values of bonding systems on eroded enamel surface is statistically less then sound ename

Does Al2O3 airborne particle abrasion improve repair bond strength of universal adhesives to aged and non-aged nanocomposites?

This study investigated the effect of universal adhesives on the resin composite–composite adhesion for immediate and aged repair with and without air-borne particle abrasion. Composite resin specimens were fabricated by placing multiple increments of resin composite (Clearfil Majesty Posterior) into cylindrical cavities (diameter: 4 mm, height: 2 mm) and photo-polymerized. Specimens (N = 720) were randomly assigned to 4 groups (fresh dry specimens, 24 h and 6 months water storage and thermocycled). These four main groups (n = 180) were further assigned to 2 groups (n = 90) according to the surface conditioning procedures; (a) Al2O3 air-abrasion and (b) No air-abrasion. Then, all subgroups were divided into six subgroups due to the adhesive procedures (a) All Bond Universal: AB (Bisco Inc.), (b) Monobond Plus: MP (Ivoclar Vivadent), (c) G-Premio Bond: GP (GC), Gluma Bond Universal: GB (Heraus Kulzer), Clearfil Universal Bond: CU (Kuraray), Clearfil Universal Bond Quick: SK (Kuraray). All bonding systems were applied according to the manufacturer’s instructions and new composite blocks were bonded to the specimens for shear bond strength testing at the Universal Testing Machine (0.5 mm/min). Al2O3 air-abraded groups showed significantly higher bond strength values compared to non-treated groups (p < 0.0001). CU and SK groups showed higher bond strength values and the worst values were observed for the groups of MP. Conditioning with Al2O3 air-abrasion and silane in universal adhesives improves the bond strength of universal adhesives in composite repair

The influence of blood and/or hemostatic agent contamination on Micro-TBS to dentin

WOS: 000353474900001Aim: The purpose of this study was to evaluate the effects of blood contamination and hemostatic agent Ankaferd Blood Stopper (ABS: Ankaferd Drug Inc, Istanbul, Turkey) on the microtensile bond strength of a self-etching adhesive. Material and methods: Flat dentin surfaces were created from 40-M teeth and randomly divided to four groups according to contamination and adhesive procedure. The specimens of Group 1 are contaminated with blood; ABS was applied to the specimens of Group 2 after blood contamination and applied to the specimens of Group 3 without blood contamination. Group 4 is control group and self-etching adhesive was applied to all specimens. Teeth were restored with a nanohybrid composite. The specimens were sectioned to the beams and microtensile testing was carried out and the data were statistically analyzed with analysis of variance test. Tukey's honestly significant difference post hoc test was also performed for multiple comparisons to compare subgroups. Results: Group 4 had the highest strength value, followed by Group 3, while Group 1, which contacts only with blood, had the lowest strength value. Conclusion: ABS has a negative effect on the bond strength of one-step self-etching adhesive system

Nanofil rezin kompozitlerle restore edilmiş 107 anterior dişin klinik olarak değerlendirilmesi: 32 aylık takip

Aim: This study evaluated the clinical performance of a nanofill resin composite in Class III and IV cavities.Materials and Methods: One hundred and seven Class III and Class IV restorations were performed with a nanofill resin composite. Restorations were evaluated using the modified USPHS/FDI criteria. The changes were analyzed using McNemar and Marginal Homogeneity and Kaplan-Meier tests.Results: Fourteen absolute failures were encountered resulting in a survival rate of 86.8% (Kaplan-Meier). Nanofill resin composite showed acceptable clinical performance up to 32 months of service.Conclusion: However color stability and retention decreased at the end of two year fol-low up instead of fractures.Amaç: Bu çalışmanın amacı, nanofil bir rezin kompozitin klinik performansının sınıf 3 ve sınıf 4 kavitelere yapılan restorasyonlar ile değerlendirilmesidir.Gereç ve Yöntem: 107 adet sınıf 3 ve sınıf 4 restorasyon nanofil rezin kompozit ile re-store edildi ve daha sonra modifiye USPHS/FDI kriterleri ile değerlendirildi. Sonuçlar McNemar ve Marjinal Homojenite ve Kaplan-Meier testleri ile analiz edildi.Bulgular: 14 adet restorasyonda başarısızlık tespitiyle birlikte %86,8 lik bir restorasyon başarı oranı yakalandı. Nanofil rezin kompozitin 32 aylık periyotta kabul edilebilir bir klin-ik başarı gösterdiği tespit edildi.Sonuç: 2 yıllık takip sonunda renk stabilitesi ve retansiyonun azaldığı belirlendi

Does Al2O3 airborne particle abrasion improve repair bond strength of universal adhesives to aged and non-aged nanocomposites?

This study investigated the effect of universal adhesives on the resin composite-composite adhesion for immediate and aged repair with and without air-borne particle abrasion. Composite resin specimens were fabricated by placing multiple increments of resin composite (Clearfil Majesty Posterior) into cylindrical cavities (diameter: 4 mm, height: 2 mm) and photo-polymerized. Specimens (N = 720) were randomly assigned to 4 groups (fresh dry specimens, 24 h and 6 months water storage and thermocycled). These four main groups (n = 180) were further assigned to 2 groups (n = 90) according to the surface conditioning procedures; (a) Al2O3 air-abrasion and (b) No air-abrasion. Then, all subgroups were divided into six subgroups due to the adhesive procedures (a) All Bond Universal: AB (Bisco Inc.), (b) Monobond Plus: MP (Ivoclar Vivadent), (c) G-Premio Bond: GP (GC), Gluma Bond Universal: GB (Heraus Kulzer), Clearfil Universal Bond: CU (Kuraray), Clearfil Universal Bond Quick: SK (Kuraray). All bonding systems were applied according to the manufacturer's instructions and new composite blocks were bonded to the specimens for shear bond strength testing at the Universal Testing Machine (0.5 mm/min). Al2O3 air-abraded groups showed significantly higher bond strength values compared to non-treated groups (p < 0.0001). CU and SK groups showed higher bond strength values and the worst values were observed for the groups of MP. Conditioning with Al2O3 air-abrasion and silane in universal adhesives improves the bond strength of universal adhesives in composite repair

Clinical performance of indirect composite onlays and overlays: 2-year follow up

WOS: 000373945200009This prospective clinical trial evaluated the clinical performance of indirect onlay and overlay restorations made of resin composite. From January 2012 to March 2013, a total of 60 patients (36 males, 24 females; mean age; 34.4 +/- 10 years) received 67 posterior onlay/overlay restorations in the maxilla or mandible made of laboratory-processed indirect composite (Gradia, GC, Japan). Patients were followed until March 2015. Two operators luted all restorations adhesively (Variolink II). Two independent calibrated examiners evaluated the restorations at baseline (2weeks), 6 months, and then annually, during regularly scheduled maintenance appointments, using the modified USPHS criteria for anatomic form, marginal adaptation, color match, surface roughness, marginal discoloration, secondary caries, and postoperative sensitivity. The observation periods involved 4 recalls during 24 months. Changes in the USPHS parameters were analyzed with the Friedman and Bonferroni-adjusted Wilcoxon signed-ranks tests (=.05). The mean observation period was 24.1 months. All restorations assessed were clinically acceptable with alfa scores predominating. Two restorations failed due to severe pain and subsequent extraction during the observation period. Not the color match (p>.05) but marginal adaptation (p<.05), marginal discoloration (p<.05), and surface roughness (p<.05) showed a significant difference between the baseline and the 2-year recall. No secondary caries or fractures were observed until the final follow-up. The indirect composite tested demonstrated to be successful for posterior onlay and overlays but deteriorations in qualitative parameters were observed during the 2-year clinical service

Clinical evaluation of low-shrinkage bioactive material giomer versus nanohybrid resin composite restorations: A two-year prospective controlled clinical trial

This study evaluated the clinical performance of low-shrinkage bioactive resin composite compared with a conventional nanohybrid resin composite. A total of 35 patients (18 males, 17 females; mean age: 29±9 years old) received, randomly, 35 pairs of fillings restored with either low-shrinkage bioactive material employing Giomer filler technology (Beautifil II LS, Shofu Inc, Kyoto, Japan) or conventional nanohybrid resin composite (Clearfil Majesty Posterior, Kuraray, Japan) in Class I and Class II cavities. Two operators made all the restorations using the corresponding adhesive resins: FL-Bond II (Shofu Inc) and Clearfil SE Bond (Kuraray), according to each manufacturer's instructions. Two calibrated operators evaluated the restorations two weeks after placement (baseline), at six months, and at one and two years using FDI criteria (Scores 1-5). Data were analyzed using the McNemar test (α=0.05). Mean observation time was 27.4 ± 4.1 months (min=20.8; max=33.7). In both groups, according to FDI criteria, the restorations were mostly rated with best scores (Score 1 or 2) for biological, functional, and optical parameters. For one filling in the group restored with nanohybrid resin composite, a small and localized secondary caries lesion was observed and monitored at the one- and two-year follow-ups. One restoration in the low-shrinkage Giomer restorative group was accepted as a failure due to retention loss. Over the two-year follow-up, both the Giomer and the nanohybrid resin composite restorations' performance was clinically acceptable