Fracture resistance of Vita suprinity versus IPS e.max CAD vonlays restoring premolars (An in vitro study)

El-Sayed, Mostafa; Sherif, Rana; Elkhodary, Noha Adel

doi:10.22271/oral.2020.v6.i3k.1029

Cited by 7 publications

(6 citation statements)

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“…18 For individual subjects with bruxism, Nishigawa et al 19 reported that mean maximum voluntary and nocturnal bite force may increase as high as 774.73 and 414.82 Newton (N), respectively. However, the mean fracture resistance for lithium disilicate glass ceramic vonlays applied on premolars was reported as 582.3 N. 13 Since the signs of bruxism were evident for our patient, employing a night-guard to preserve restorations was crucial. Hence, immediately after the cementation of the final restorations, an alginate impression was taken, and a vacuumformed occlusal splint was delivered to the patient within the same day.…”

Section: Discussionmentioning

confidence: 82%

“…Therefore, in this case, vonlay restorations were proved to combine esthetic and conservative approach of veneer and onlay restorations as an alternative to crown restoration. 13 In generalized severe toothwear cases, the loss of OVD is a frequently encountered problem. 14 Restoring functional occlusal relationships with the reconstruction of OVD requires a complex, multistep treatment.…”

Section: Discussionmentioning

confidence: 99%

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Rehabilitation of a Severely Worn Dentition with Partial Lithium-disilicate Glass Ceramic Restorations: A Case Report

Oğuz¹,

Berksun²

2021

EADS

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Rehabilitation of worn dentition is a challenging task because several predisposing factors may be included in the pathogenesis. The treatment options and process should be carefully considered based on the clinical condition and patients’ requirements. This case report represents the esthetic rehabilitation of a 68-year-old patient who exhibited severely worn teeth caused by attrition and erosion. After clinical evaluation, 3 mm increase in occlusal vertical dimension was planned with partial lithium-disilicate ceramic restorations as laminate veneers for anterior teeth and vonlays (onlays with veneer extentions) for posterior teeth in maxilla. The adaptation of the patient to the increased occlusal vertical dimension was tested for 1 month by provisional direct composite restorations. As the patient did not show any discomfort, definitive restorations were completed. The patient was satisfied with the esthetics and functionality of her new dentition.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Rehabilitation of a Severely Worn Dentition with Partial Lithium-disilicate Glass Ceramic Restorations: A Case Report

Oğuz¹,

Berksun²

2021

EADS

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“…Vonlay was chosen as an alternative to full coverage restorations as it combines the benefit of onlay associated with that of laminate veneer requiring minimal preparation. (15) Standardized preparation dimensions were guaranteed by duplicating the prepared tooth & the construction of epoxy resin dies. The epoxy used has modulus of elasticity that is near that of tooth structure to mimic the clinical situation.…”

Section: Discussionmentioning

confidence: 99%

“…Fig. ( 1) having a cement space set at 60 µm (15) & restoration dimensions were illustrated & adjusted on the design window. Data were transported to the com puter connected 5-axis milling machine (vhf CAM 5-S1; vhf camfacture AG, Ammerbuch, Germany) following manufacturer instructions of each material.…”

Section: Designing and Milling Of Vonlaysmentioning

confidence: 99%

“…All vonlays were cemented on their respective epoxy dies using self-adhesive resin cements (RelyX Unicem, 3M ESPE, USA), a 2 kg load was used for 5 min to standardize the cement thickness in all samples using custom-made seating device. (15) Then, excess cement was removed using a microbrush. Margins were spot cured for 2-3 seconds/surface using a light curing unit.…”

Section: Cementation Proceduresmentioning

confidence: 99%

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Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Asaad,

Fahim,

Kotb Salem

2024

Egyptian Dental Journal

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Objective: This research aimed to evaluate & compare marginal accuracy & fracture resistance of three different CAD/CAM fabricated monolithic vonlays. Materials & Methods:A typodont maxillary second premolar was prepared to receive thirty CAD/CAM monolithic vonlays. Three groups of different materials (n=10) were constructed. Group(CD): Zirconia-reinforced lithium silicate (Celtra Duo). Group(VE):Hybrid ceramic(Vita Enamic). Group(BC): Reinforced composite (BRILLIANT Crios). Measurement of vertical marginal gap distance was performed at 16 predetermined points without cementation. Fracture resistance test was conducted for cemented vonlays on their respective epoxy dies.Results: Difference in vertical marginal gap of the three groups was not statistically significant, while fracture resistance showed a significant difference between the three groups. Conclusions:The three tested materials offered vonlays with comparable & clinically acceptable marginal gaps. Concerning the fracture resistance, only Brilliant Crios & Celtra Duo vonlays were proven to have acceptable fracture resistance in premolar area, while Vita Enamic is not recommended as a vonlay in the same area.

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Fracture strength of direct occlusal veneers with different short fiber-reinforced composite cores and veneering materials: an in-vitro study

Aboelnor,

Nour,

Al-Sanafawy

2024

Clin Oral Invest

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Objective The objective of this study is to evaluate the effectiveness of two different viscosities of short fiber-reinforced composite resin (SFRC) cores and two different viscosities of veneering composite resins on the fracture strength of direct occlusal veneers. Materials and methods One maxillary premolar was virtually prepared for an occlusal veneer and printed into resin dies. In total, (n = 48) resin dies were printed and assigned into three groups according to the type of core material of the occlusal veneer; mono-structured without a SFRC core, a high viscosity SFRC core, and a low viscosity SFRC core. Each group was re-divided into two subgroups (n = 8) according to the veneering composite resin; packable composite resin and injectable composite resin. Mono-structured and bi-structured direct occlusal veneers were fabricated on the resin dies using the mentioned core and veneering materials with the occlusal replica technique. Fracture strength was evaluated using a universal testing machine and the mode of failure was inspected. Statistical analysis to compare the core and veneering materials was performed using independent t test (P ≤ 0.05) and one-way ANOVA followed by tukey’s post hoc test (Pa ≤ 0.0166) when appropriate. Interactions between subgroups were tested using two-way ANOVA, and one-way ANOVA was used to compare all subgroups followed by tukey’s post hoc test (Pa ≤ 0.0033). Intergroup comparison between failure modes were performed using chi square test (Pa ≤ 0.0033). Results The presence of a SFRC core significantly improved the fracture strength of the specimens. There was no significant difference between the fracture strength of high viscosity SFRC and low viscosity SFRC cores. Specimens veneered with injectable composite resin had significantly superior fracture strength compared to packable composite resin. Additionally, there was a weak correlation between fracture strength and mode of failure. Conclusion Short fiber reinforced composite resin significantly increases the fracture strength of direct occlusal veneers. Injectable composite resin has significantly higher fracture strength than packable composite resin as veneering materials of direct occlusal veneers. Clinical relevance Bi-structured direct occlusal veneers fabricated of injectable composite resin with low viscosity SFRC cores can withstand high masticatory forces in stress-bearing areas.

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Fracture resistance of Vita suprinity versus IPS e.max CAD vonlays restoring premolars (An in vitro study)

Cited by 7 publications

References 0 publications

Rehabilitation of a Severely Worn Dentition with Partial Lithium-disilicate Glass Ceramic Restorations: A Case Report

Rehabilitation of a Severely Worn Dentition with Partial Lithium-disilicate Glass Ceramic Restorations: A Case Report

Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Fracture strength of direct occlusal veneers with different short fiber-reinforced composite cores and veneering materials: an in-vitro study

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