Fracture resistance of prepared premolars restored with bonded new lab composite and all‐ceramic inlay/onlay restorations: Laboratory study

Wafaie, Ramy Ahmed; Ali, Ashraf I.; Mahmoud, Salah Hasab

doi:10.1111/jerd.12364

Cited by 17 publications

(20 citation statements)

References 32 publications

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“…Excess resin accumulated on the enamel margins was carefully removed with the aid of an abrasive rubber point (9608 314 030, Komet) activated at low‐speed. The prepared specimens were embedded into self‐curing resin blocks (Protemp 4, 3M ESPE, St. Paul, MN) up to a depth of 3 mm apical to the cementoenamel junction after the periodontal ligament simulation was obtained by applying a layer of regular‐viscosity vinyl polysiloxane (Express Standard, 3M ESPE) onto the root portion of each tooth following a previously described procedure . Polytetrafluoroethylene cylinders having an internal diameter of 15 mm were used as mold.…”

Section: Methodsmentioning

confidence: 99%

“…Afterward, the adhesive resin was applied only on dentin and light-cured with a LED lamp at 1500 mW/cm 2 onto the root portion of each tooth following a previously described procedure. 34 Polytetrafluoroethylene cylinders having an internal diameter of 15 mm were used as mold. The specimens were stored in distilled water for 24 hours at 37 C before the restorative procedures.…”

Section: Immediate Dentin Sealingmentioning

confidence: 99%

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Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Angerame

Biasi

Agostinetto³

et al. 2019

J Esthet Restor Dent

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Objectives To evaluate the fracture resistance and marginal quality of maxillary molars restored using lithium disilicate glass‐ceramic (LDG) occlusal veneers with two preparation designs. Methods Sixteen extracted maxillary molars were assigned to two groups (n = 8). In group 1 (G1), the teeth received a preparation for a conservative full‐coverage occlusal veneer restoration with a 90° rounded shoulder margin. In group 2 (G2), the teeth underwent a 1‐mm cusp reduction with a marginal chamfer. LDG restorations (IPS e.max CAD) were obtained with the Cerec 3 CAD/CAM system and luted with Variolink II cement. After thermomechanical aging (1 250 000 cycles), the specimens were loaded to fracture. A semiquantitative marginal seal evaluation was performed observing resin replicas of the specimens at the scanning electron microscope. Cement thickness was assessed at the stereomicroscope on sectioned specimens. Collected data were statistically analyzed by parametric and nonparametric tests. Results The maximum load to fracture was 2395.01 ± 150.96 N in G1 and 2408.39 ± 112.66 N in G2. Most of the observed specimens exhibited restorable fractures and continuous margins. Cement thickness was 132 ± 38 μm in G1 and 150 ± 41 μm in G2. No differences between the groups emerged. Conclusion This study demonstrated similar satisfactory performance of the two considered preparations designs for occlusal veneer with LDG. Clinical Significance A new minimally invasive occlusal veneer preparation with marginal chamfer exhibited promising fracture resistance and marginal adaptation that were comparable to those of a standard conservative preparation for the restoration of molars with CAD/CAM lithium disilicate occlusal veneers.

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Section: Methodsmentioning

confidence: 99%

Section: Immediate Dentin Sealingmentioning

confidence: 99%

Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Angerame

Biasi

Agostinetto³

et al. 2019

J Esthet Restor Dent

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“…Compared with other indirect materials, inlays out of yttrium-stabilized zirconia ceramic showed comparable fracture resistance to intact teeth of up to 1646 N due to the high compressive strength and transformation toughening of this ceramic [41]. Inlays made out of resin composite and lithium disilicate glass ceramic revealed lower values than intact teeth, whereas composite ones had the lowest fracture strength due to a minor Young's modulus of elasticity and rigidity [31].…”

Section: Discussionmentioning

confidence: 91%

Fracture load of 3D printed PEEK inlays compared with milled ones, direct resin composite fillings, and sound teeth

et al. 2020

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Objective The objective of this in vitro study was to investigate fracture load, fracture types, and impact of chewing simulation of human molars restored with 3D printed indirect polyetheretherketone (PEEK) inlays and compare these with milled indirect PEEK inlays, direct resin composite fillings, and sound teeth. Materials and methods A total of 112 molars with form congruent class I cavities were restored with (n = 16/group) 3D printed indirect PEEK inlays via fused layer manufacturing (FLM): (1) Essentium PEEK (ESS), (2) KetaSpire PEEK MS-NT1 (KET), (3) VESTAKEEP i4 G (VES), (4) VICTREX PEEK 450G (VIC), (5) milled indirect PEEK inlays JUVORA Dental Disc 2 (JUV), and (6) direct resin composite fillings out of Tetric EvoCeram (TET). Sound teeth (7) acted as positive control group. Half of the specimens of each group (n = 8) were treated in a chewing simulator combined with thermal cycling (1.2 million × 50 N; 12,000 × 5°C/55°C). Fracture load and fracture types of all molars were determined. Statistical analyses using Kolmogorov-Smirnov test and two-way ANOVA with partial eta squared (η p 2 ) followed by Scheffé post hoc test, chi square test and Weibull modulus m with 95% confidence interval were computed (p < 0.05). Results ESS and TET demonstrated the lowest fracture load with a minimum of 956 N, whereas sound molars showed the highest values of up to 2981 N. Chewing simulation indicated no impact (p = 0.132). With regard to Weibull modulus, KET presented a lower value after chewing simulation than JUV, whereas TET had the highest value without chewing simulation. All indirect restorations revealed a tooth fracture (75-100%), direct resin composite fillings showed a restoration fracture (87.5%), and 50% of the sound teeth fractured completely or had cusp fractures. Conclusions All 3D printed and milled indirect PEEK inlays as well as the direct resin composite fillings presented a higher fracture load than the expected physiological and maximum chewing forces. Clinical relevance 3D printing of inlays out of PEEK via FLM provided promising results in mechanics, but improvements in terms of precision and esthetics will be required to be practicable in vivo to represent an alternative dental material.

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“…Restorative procedures cause deterioration of enamel continuity and decrease the resistance of teeth to fracture. In particular, restorations involving more than one-third of the intercuspal distance are even more susceptible to cusp fracture (19). Therefore, the fracture resistance of restorative materials is clinically very important.…”

Section: Discussionmentioning

confidence: 99%

Fracture Resistance of Teeth Restored with Bulk-Fill and Fiber-Reinforced Composites in Class II Cavities

Keskin

Gündoğar

Tek

2020

Odovtos - Int J Dent Sc

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This study aimed to evaluate the fracture resistance of teeth restored with conventional, bulk-fill, and fiber-reinforced composite materials regarding intact teeth. Standard cavities were prepared on 70 sound third molar teeth. The teeth were randomly divided into six groups: intact teeth, conventional Bis-GMA based composite, fiber-reinforced composite, Bis-GMA based bulk-fill composite, ormocer based bulk-fill composite, glass containing resin-based bulk-fill composite. The data was obtained by a Universal Testing Machine and analyzed statistically. Fracture resistance of the teeth restored with conventional composite was significantly lower than the other groups (p<0.05). The teeth restored with fiber-reinforced composite showed the highest fracture resistance; however, there were no statistically significant differences between intact teeth and teeth restored with fiber-reinforced composite, Bis-GMA based bulk-fill composite, and glass containing resin-based bulk-fill composite (p>0.05). The obtained data showed that restoring teeth with bulk-fill and fiber-reinforced composites could be recommended in Class II cavities.

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Fracture resistance of prepared premolars restored with bonded new lab composite and all‐ceramic inlay/onlay restorations: Laboratory study

Abstract: Premolar teeth restored with zirconia ceramic inlays and onlays exhibited fracture resistance comparable to intact teeth.

Cited by 17 publications

References 32 publications

Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Fracture load of 3D printed PEEK inlays compared with milled ones, direct resin composite fillings, and sound teeth

Fracture Resistance of Teeth Restored with Bulk-Fill and Fiber-Reinforced Composites in Class II Cavities

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