Clinical workflow of two different CAD/CAM systems for veneers manufacture

Jurado, Carlos A.; Mourad, Firas; Felton, David A.; Tinoco, Jose Villalobos

doi:10.4103/ejgd.ejgd_216_19

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Recent studies have demonstrated that CAD–CAM restorations have a better marginal adaptation than conventionally fabricated indirect restorations 8,9 . Similar to CAD–CAM complete coverage restorations, laminate veneers (LVs) can be fabricated using CAD–CAM technology where an intraoral scanner (IOS) is used to register the preparation, designed, and then milled from a material of choice 10,11 . These restorations have been shown to provide high esthetic results to fulfill patient demands 12,13 .…”

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confidence: 99%

“…8,9 Similar to CAD-CAM complete cov-erage restorations, laminate veneers (LVs) can be fabricated using CAD-CAM technology where an intraoral scanner (IOS) is used to register the preparation, designed, and then milled from a material of choice. 10,11 These restorations have been shown to provide high esthetic results to fulfill patient demands. 12,13 LVs fabricated using digital workflow have shown a satisfactory survival rate of 94% after 9 years.…”

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Effect of incisal preparation design on the fracture strength of monolithic zirconia‐reinforced lithium silicate laminate veneers

Jurado

Sadid‐Zadeh

Watanabe

et al. 2023

Journal of Prosthodontics

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PurposeThis study aimed to assess the fracture resistance of monolithic zirconia‐reinforced lithium silicate laminate veneers (LVs) fabricated on various incisal preparation designs.Materials and methodsSixty maxillary central incisors with various preparation designs were 3D‐printed, 15 each, including preparation for: (1) LV with feathered‐edge design; (2) LV with butt‐joint design; (3) LV with palatal chamfer; and (4) full‐coverage crown. Restorations were then designed and manufactured from zirconia‐reinforced lithium silicate (ZLS) following the contour of a pre‐operation scan. Restorations were bonded to the assigned preparation using resin cement and following the manufacturer's instructions. Specimens were then subjected to 10,000 thermocycles at 5 to 55°C with a dwell time of 30 s. The fracture strength of specimens was then assessed using a universal testing machine at a crosshead speed of 1.0 mm/min. One‐way ANOVA and Bonferroni correction multiple comparisons were used to assess the fracture strength differences between the test groups (α = 0.001). Descriptive fractographic analysis of specimens was carried out with scanning electron microscopy images.ResultsComplete coverage crown and LV with palatal chamfer design had the highest fracture resistance values (781.4 ± 151.4 and 618.2 ± 112.6 N, respectively). Single crown and LV with palatal chamfer had no significant difference in fracture strength (p > 05). LV with feathered‐edge and butt‐joint designs provided significantly (p < 05) lower fracture resistance than complete coverage crown and LV with palatal chamfer design.ConclusionThe fracture resistance of chairside milled ZLS veneers was significantly influenced by the incisal preparation designs tested. Within the limitation of this study, when excessive occlusal forces are expected, LV with palatal chamfer display is the most conservative method of fabricating an indirect restoration.

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Section: Figurementioning

confidence: 99%

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confidence: 99%

Effect of incisal preparation design on the fracture strength of monolithic zirconia‐reinforced lithium silicate laminate veneers

Jurado

Sadid‐Zadeh

Watanabe

et al. 2023

Journal of Prosthodontics

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Printed Digital Wax-up Model as a Blueprint for Layered Pressed-ceramic Laminate Veneers: Technique Description and Case Report

Jurado,

Villalobos-Tinoco,

Mekled

et al. 2023

Operative Dentistry

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SUMMARY This article presents a clinical technique for transferring Digital Smile Design (DSD) information and a digital wax-up to fabricate highly personalized ceramic laminate veneers. The hybrid workflow of digitally designed wax-up and conventional hand-crafted veneers is showcased in a female adult who sought to improve her smile due to maxillary anterior incisal wear. The ceramic veneers, layered by feldspathic porcelain, followed the contours and shade blueprint planned with the digital wax-up. The DSD improved the harmony of the facial-and-smile relationship, and the ceramic restorations fulfilled the patient's esthetic and functional demands. Guides based on the printed model with the digitally designed wax-up can provide a reference for pressed lithium disilicate veneers layered with feldspathic porcelain.

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The Influence of Thickness on Light Transmission for Pre- and Fully Crystallized Chairside CAD/CAM Lithium Disilicate Ceramics

Floriani,

Abuhammoud,

Rojas-Rueda

et al. 2024

Materials

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Aim: This in vitro study aimed to compare the light-transmission properties of two chairside CAD/CAM lithium disilicate (LD) ceramics (a novel fully crystallized and a traditional pre-crystallized) across varying thicknesses. Materials and Methods: One hundred flat specimens were obtained from precrystallized (e.max CAD, Ivoclar Vivadent, Schaan, Liechtenstein) and fully crystallized (LiSi GC Block; GC, Tokyo, Japan) LD at five different thicknesses (0.5, 0.75, 1.0, 1.50 and 2.0 mm). All specimens were polished with a polishing system for lithium disilicate restorations following recommendations from the manufacturer. Light transmission was evaluated with a radiometer. The statistical analysis between e.max CAD and LiSi GC Block was performed using a Mann–Whitney test for each thickness at a significance level of 0.05 (p < 0.05), followed by a Kruskal–Wallis test to compare the light transmission between the thicknesses of e.max CAD and LiSi GC Block. Results: Light transmittance was significantly affected by ceramic thickness. The 0.5 mm thick specimens exhibited the highest transmittance values compared to all other groups, while a light transmittance of 0.00 was observed in the 2.0 mm thick specimens for both e.max CAD and LiSi GC Block. In the comparison between e.max CAD and LiSi GC Block according to thickness, there was a statistically significant difference exclusively between groups with a thickness of 1.50 mm (p = 0.002). Conclusions: Light transmission for pre- and fully crystallized CAD/CAM lithium disilicate ceramics only showed a statistical difference at the thickness of 1.50 mm (p = 0.002). E.max CAD demonstrated acceptable light transmission up to a thickness of 1.5 mm. Clinical Significance: A thickness of 2 mm for chairside CAD/CAM lithium disilicate ceramics, whether pre-crystallized or fully crystallized, necessitates the use of dual-cure resin luting cement due to reduced light transmission.

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Clinical workflow of two different CAD/CAM systems for veneers manufacture

Cited by 4 publications

References 19 publications

Effect of incisal preparation design on the fracture strength of monolithic zirconia‐reinforced lithium silicate laminate veneers

Effect of incisal preparation design on the fracture strength of monolithic zirconia‐reinforced lithium silicate laminate veneers

Printed Digital Wax-up Model as a Blueprint for Layered Pressed-ceramic Laminate Veneers: Technique Description and Case Report

The Influence of Thickness on Light Transmission for Pre- and Fully Crystallized Chairside CAD/CAM Lithium Disilicate Ceramics

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