Background: Achieving an optimal shade match for these restorations is crucial for aesthetic outcomes. The thickness of zirconia/glass veneer and the choice of implant abutment material play vital roles in determining the final shade of implant restorations.
Materials And Methods: This study investigated the influence of zirconia/glass veneer thickness (0.5 mm and 1.0 mm) and implant abutment material (zirconia and titanium) on the final shade of implant restorations. A total of 60 identical implant restorations were fabricated and divided into four groups based on the combinations of veneer thickness and abutment material. The shade of each restoration was assessed using a shade guide, and color differences (ΔE) were measured with a spectrophotometer. Data were analyzed using statistical tests (e.g., ANOVA).
Results: The results indicated that the veneer thickness significantly influenced the final shade of implant restorations. Restorations with 0.5 mm veneer thickness exhibited a lower ΔE value (indicating a closer shade match) compared to those with 1.0 mm veneer thickness. Additionally, the choice of implant abutment material had a minor but statistically significant effect on shade. Zirconia abutments yielded slightly better shade-matching results compared to titanium abutments.
Conclusion: In implant restorations, the thickness of the zirconia/glass veneer plays a critical role in achieving a desirable shade match. A veneer thickness of 0.5 mm is recommended for optimal aesthetic outcomes.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11001075 | PMC |
http://dx.doi.org/10.4103/jpbs.jpbs_1062_23 | DOI Listing |
Dent Mater
January 2025
Department of Biomaterials, School of Dentistry, University of São Paulo, Sao Paulo, Brazil.
Objective: To analyze the impact of the translucency/opacity of two commercial brands of resin cements and different translucency of lithium disilicate on the masking ability of saturated substrates.
Methods: 120 samples (n = 5) were prepared using 0.5 mm lithium disilicate (IPS e.
Ann N Y Acad Sci
January 2025
Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon, Hong Kong.
Among hornbill birds, the critically endangered helmeted hornbill (Rhinoplax vigil) is notable for its casque (a bulbous beak protrusion) being filled with trabeculae and fronted by a very thick keratin layer. Casque function is debated but appears central to aerial jousting, where birds (typically males) collide casques at high speeds in a mid-flight display that is audible for more than 100 m. We characterized the structural relationship between the skull and casque anatomy using X-ray microtomography and quantitative trabecular network analysis to examine how the casque sustains extreme impact.
View Article and Find Full Text PDFJ Vis Exp
December 2024
School of Engineering and Materials Science, Queen Mary University of London.
BMC Oral Health
December 2024
Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Background: Lithium disilicate occlusal veneers are popular for minimally invasive posterior teeth restoration. The aim of this study was to compare the fatigue resistance and crack pattern of lithium disilicate occlusal veneers fabricated using pressing and milling techniques with varying thicknesses.
Methods: Sixty lithium disilicate discs, representing occlusal veneers, were divided into four groups (n = 15) based on processing technique (IPS e.
Objective: To evaluate color masking and relative translucency parameter (RTP) of increasing dentin thicknesses from different resin composites, with or without opacifiers, on a veneer dental preparation and resin disks.
Material And Methods: Artificial darkened lateral incisors with 1mm-thick veneers preparations were used to evaluate color masking of different resinous materials, with or without opacifiers: IPS Empress Direct (ED) with or without ED Opaque; and Essentia (ES) with or without ES Masking Liner. For the RTP test; disc-shaped specimens were performed and evaluated with a spectrophotometer (VITA Easyshade) against black and C4 backgrounds.
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