Objective: To evaluate the translucency and effects of different cement colors on the final shade of lithium disilicate ceramics (LDS) and zirconia-reinforced lithium silicate ceramics (ZLS) over an A1 and A3 tooth-shaded background. Materials and Methods: Eighty-eight rectangular-shaped specimens were sliced from LDS and ZLS blocks. The final thickness of the specimens was set at 0.8 ± 0.01 mm. Spectrophotometric measurements for the translucency were taken against black and white backgrounds. Composite resin tooth-shaded background disks were fabricated in two shades (A1 and A3), as were resin cement disks (opaque and translucent) (n = 11). Next, the ceramic specimens and tooth-shaded backgrounds were connected with glycerin, and baseline measurements were taken. These measurements were used as a reference. Then, the ceramic specimens, cement specimens, and tooth-shaded backgrounds were connected together with glycerin, and a second set of measurements was taken. The CIEDE2000 (ΔE 00) color formula was used to calculate the translucency and color differences. A Mann-Whitney U test was also performed for the translucency, and a three-way ANOVA (analysis of variance) test was performed for the ΔE 00 values (α = .05). Results: The LDS and ZLS groups had similar translucency (P = .055). The ΔE 00 values of the specimens were significantly affected by the cement color and tooth-shaded backgrounds in the LDS and ZLS groups (P < .05). Using the opaque cement color resulted in statistically significant differences against the light and dark (A1 and A3) tooth-shaded backgrounds in both the LDS and ZLS groups (P = .022 and P = .006). Conclusions: The material type did not affect the translucency or final color. However, the cement color did affect the final shade when thin ceramic restorations were used. Clinical Significance: It should be noted that the cement color and tooth-shaded background used may change the final color of thin high translucency ceramic restorations that contain lithium disilicate and zirconia-reinforced lithium silicate.

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Purpose To compare MEP which is originally manufactured for increasing bond strength between organic resins and ceramic with conventional surface treatment methods in preparation of leucite-reinforced FC surfaces regarding shear bond strength (SBS) of stainless steel brackets and the mode of bond failure. Materials and Methods Forty specimens that were fabricated from FC material and glazed were randomly assigned to four surface conditioning methods: (1) CoJet Sand; (2) MEP; (3) HF acid etching followed by silane coupling agent; (4) Diamond bur followed by silane coupling agent. The SBS was determined using universal testing machine. Bond failure sites were classified according to Adhesive Remnant Index (ARI). Results No statistically significant difference (p>0.05) was found in SBS between the groups while significant intergroup differences were detected concerning ARI scores (p<0.001). Group 1 had ARI score 1 and 2 indicating mode of failure at the adhesive interface with greater percentage of the adhesive left on bracket base. The other groups had higher frequency of ARI score 3 and 2. The quantity of the ARI retained on the ceramic surface was highest in Group 3, followed by Group 4 and Group 2. Conclusion MEP can be a suitable alternative for bonding metal brackets to FC surface.

SUMMARY Aim To compare the surface roughness and color stability of a novel alkasite with current direct restorative materials with and without an aging step. Methods and Materials Twenty-six specimens of each of the following materials were prepared: alkasite, ormocer, giomer, high-viscosity glass ionomer, glass carbomer, and nanohybrid composite (control). Half of the specimens in each group were stained, the other half of the specimens were aged and then stained. Color and surface roughness evaluations were conducted at baseline, after aging and after staining, using a dental spectrophotometer, and a three-dimentional (3D) noncontact optical profilometer, respectively. Statistical analyses were completed using one-way analysis of variance, post hoc Tukey test, and paired samples t-test. Results At baseline and after aging, the surface of alkasite was found to be rougher than nanohybrid composite and ormocer surfaces (p&lt;0.05). However, in terms of roughness increase caused by aging, ormocer, nanohybrid composite, and alkasite were affected in a similar way (p&gt;0.05). In terms of color stability, alkasite was more colored than nanohybrid composite and ormocer (p&lt;0.05), and performed similar to giomer (p&gt;0.05). Conclusions The surface roughness and color stability characteristics of alkasite material was between composite resins and glass ionomer-based materials after aging.

Bu çalışmanın amacı, farklı tekniklerle uygulanan kompozit rezin laminate veneer (RLV) restorasyonların bir yıllık klinik performansını değerlendirmektir. YÖNTEM ve GEREÇLER: İlk 15 diş, Esthet•X HD (Dentsply DeTrey, Konstanz, Almanya) ile indirekt kompozit RLV restorasyonlarla; sonraki 15 diş Ceram•X Duo (Dentsply DeTrey) ile direkt kompozit RLV restorasyonlarla restore edildi. Başlangıç, 6 ve 12 ayda restorasyonlar modifiye Ryge kriterleri, cep derinliği, plak indeksi ve diş eti indeksi kullanılarak değerlendirildi. Klinik kriterlerin değerlendirilmesinde Mann Whitney U testi kullanıldı. Cep derinliği ölçümleri için Friedman testi kullanıldı. Plak ve diş eti indeksindeki farklılıklar Fisher'in kesin testi ve Oran karşılaştırmaları testi ile analiz edildi. BULGULAR: Mann Whitney U testi sonucunda, gruplar arasında sadece kenar renklenmesi kriterinde istatistiksel olarak anlamlı fark bulundu (p≤0.05). İndirekt grupta 6. ay kontrolünde cep derinliği ve gingival indeks skorları arttı, bu artış istatistiksel olarak anlamlı bulundu (p≤0.05). Bu kriterlere göre direkt tekniğin indirekt teknikten istatistiksel olarak anlamlı ölçüde daha iyi olduğu tespit edildi (p≤0.05). TARTIŞMA ve SONUÇ: Bu çalışmanın bulgularına dayanarak, her iki teknikle yapılmış kompozit RLV restorasyonlar anterior dişlerde estetik problemi olan hastalarda iyi birer tedavi seçeneği olabilir. Ancak erken dönem kenar renklenmesi, preparasyon, ölçü ve yapıştırma aşamasındaki zorluklar indirekt tekniğin dezavantajları olarak karşımıza çıkmaktadır.

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PurposeThe use of porcelain laminate veneers (PLVs) is a minimally invasive technique that is often used in restorative dentistry due to esthetic considerations. The aim of this study was to evaluate PLVs according to the Fédération Dentaire Internationale (FDI) World Dental Federation clinical criteria.Materials and methodsThis clinical study included 11 patients (7 female and 4 male) who had been admitted to the Uşak University Faculty of Dentistry between February 2019 and February 2021. Before taking part in the study, patients were informed about alternative treatment procedure options. A total of 30 PLVs were fabricated and cemented, and patients were evaluated according to the FDI criteria (with a follow‐up after 2 years).ResultsRestorations were evaluated by two trained researchers. During the follow‐up evaluation, no fractures or cracks were observed in any restoration. Further, 73% (n = 22) of the PLVs had perfect marginal adaptation and only 27% (n = 8) had small marginal fractures that could be removed by polishing. Moreover, 57% (n = 17) of the PLVs were evaluated as a good color match (no difference in shade and/or translucency), whereas 33% (n = 13) had only minor deviations. In periodontal examinations, 23% (n = 7) of the PLVs had no plaque, inflammation, or pockets, whereas 77% (n = 23) had minor plaque inflammation and no pocket development.ConclusionsAs there were no fractures, fails, or need for removal of the restorations after 2 years, PLVs showed clinically satisfactory performance. The performance of PLVs can be considered highly favorable due to the minimally invasive and periodontally‐compatible nature, with a good color match when carefully planned.