Fracture Resistance of Two Preparation Designs on Anterior Laminate Veneers: A Systematic Review and Meta-analysis

Joseph, Asha; Singh, Prabath; Ravi, Arjun B; Ramanarayanan, Venkitachalam; Thaj, Beegum; Krishnan, Venugopal

doi:10.5005/jp-journals-10015-2100

Cited by 3 publications

(4 citation statements)

References 53 publications

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“…This reduction minimizes the occurrence of progressive chemical, mechanical, and physical disintegration, which are known to lead to issues such as recurrent deterioration, microleakage, and the formation of stress concentrations [17,18]. Ensuring a su cient marginal t in laminate veneers holds signi cant importance [19].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Vertical Marginal Discrepancy and Load-to-Failure of Monolithic Zirconia and Lithium Disilicate Laminate Veneers Manufactured in Different Thicknesses

YILDIZ,

Ünlü,

Aydoğdu

2024

Preprint

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Objectives This study aimed to evaluate the feasibility of monolithic zirconia laminate veneers (MZLV) compared to lithium disilicate laminate veneers (LDLV). Materials and Methods Sixty resin replicas, each prepared with depths of 0.5 mm, 0.7 mm, and 1 mm, were produced using a 3D printer from acrylic teeth. Laminate veneers of these thicknesses were milled from pre-sintered monolithic zirconia and lithium disilicate blocks. The intaglio surface of MZLV was treated with air abrasion using 110 µm diameter silica-modified aluminum oxide particles and ceramic primer, while LDLV was etched and treated with the same agent before cementation with composite resin. Vertical marginal discrepancy (VMD) was assessed using a stereomicroscope, and a load-to-failure test was conducted using a universal testing machine. Failure modes were evaluated macroscopically on fractured surfaces. Data were analyzed statistically using Two-way ANOVA and Bonferroni correction (α = 0.05). Results LDLV samples exhibited significantly larger VMD compared to MZLV samples across all thicknesses, especially in cervical, palatal, and mean data. Within the LDLV group, load-to-fracture values for 0.7 mm and 1.0 mm thicknesses were similar, whereas for 0.5 mm thickness, it was significantly lower. In the MZLV group, load-to-fracture values were lower for 0.7 mm and 1.0 mm thicknesses compared to LDLV, but higher for 0.5 mm thickness. Conclusions Material choice and restoration thickness significantly influence laminate veneer restorations' success. MZLV generally exhibits superior vertical marginal fit compared to LDLV, with varying load-to-failure values across different thicknesses. Clinical management of debonding in MZLV is simpler compared to restoration fracture in LDLV. Clinical relevance: Considering clinical factors, MZLV may be a preferable option to LDLV for this restoration with the thickness of 0.5 mm

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Section: Discussionmentioning

confidence: 99%

Evaluation of Vertical Marginal Discrepancy and Load-to-Failure of Monolithic Zirconia and Lithium Disilicate Laminate Veneers Manufactured in Different Thicknesses

YILDIZ,

Ünlü,

Aydoğdu

2024

Preprint

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“…The CO design of the veneers is always characterized by a linear proximal contour that has the advantages of simplicity and reproducibility. However, according to the literature [ 31 , 32 ], this type of design has not improved the debonding strength during mechanical loading and, consequently, the adhesive properties of the luting systems have not been improved over time.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Several experimental studies have focused on the correlation between the type of tooth preparation, luting materials, and failure mode of ceramic veneers in order to identify clinical and technical solutions to veneer debonding [25][26][27][28][29][30][31][32][33][34]. However, there are no studies that analyzed the influence that a novel sinusoidal marginal contour, such as the one we have proposed [18], may have on the adhesive interfacial forces.…”

Section: Discussionmentioning

confidence: 99%

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The Influence of a Novel, Crenelated Design of CAD-CAM Ceramic Veneers on the Debonding Strength

et al. 2023

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(1) Background: Aesthetic dentistry has become one of the most dynamic fields in modern dental medicine. Ceramic veneers represent the most appropriate prosthetic restorations for smile enhancement, due to their minimal invasiveness and highly natural appearance. For long-term clinical success, accurate design of both tooth preparation and ceramic veneers is of paramount importance. The aims of this in vitro study were to assess the stress in anterior teeth restored with Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) ceramic veneers and compare the resistance to detachment and the fracture of ceramic veneers prepared using two different designs. (2) Methods: Sixteen lithium disilicate ceramic veneers were designed and milled using the CAD-CAM technology and divided into two groups according to the preparations (n = 8): Group 1, conventional (CO), with linear marginal contour and Group 2, crenelated (CR), the latter with our novel (patented) sinusoidal marginal design. All samples were bonded to anterior natural teeth. The mechanical resistance to detachment and fracture was investigated by applying bending forces on the incisal margin of the veneers in order to determine which type of preparation leads to better adhesion. An analytic method was employed, as well, and the results of the two approaches were compared. (3) Results: The mean values of the maximum force recorded at the veneer detachment were 78.82 ± 16.55 N for the CO group and 90.20 ± 29.81 N for the CR group. The relative increase, equal to 14.43%, demonstrated that the novel CR tooth preparation provided higher adhesive joints. In order to determine the stress distribution within the adhesive layer, a finite element analysis (FEA) was performed. The statistical t-test showed that the mean value of the maximum normal stresses is higher for the CR-type preparations. (4) Conclusions: The patented CR veneers represent a practical solution to augment the adhesion and mechanical properties of ceramic veneers. The obtained results demonstrated that CR adhesive joints triggered higher mechanical and adhesive forces, which subsequently led to a higher resistance to detachment and fracture.

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Evaluation of vertical marginal discrepancy and load-to-failure of monolithic zirconia and lithium disilicate laminate veneers manufactured in different thicknesses

Yıldız,

Güneş Ünlü,

Aydoğdu

2024

BMC Oral Health

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Fracture Resistance of Two Preparation Designs on Anterior Laminate Veneers: A Systematic Review and Meta-analysis

Cited by 3 publications

References 53 publications

Evaluation of Vertical Marginal Discrepancy and Load-to-Failure of Monolithic Zirconia and Lithium Disilicate Laminate Veneers Manufactured in Different Thicknesses

Evaluation of Vertical Marginal Discrepancy and Load-to-Failure of Monolithic Zirconia and Lithium Disilicate Laminate Veneers Manufactured in Different Thicknesses

The Influence of a Novel, Crenelated Design of CAD-CAM Ceramic Veneers on the Debonding Strength

Evaluation of vertical marginal discrepancy and load-to-failure of monolithic zirconia and lithium disilicate laminate veneers manufactured in different thicknesses

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