Marginal Gap, Internal Fit, and Fracture Load of Leucite-Reinforced Ceramic Inlays Fabricated by CEREC inLab and Hot-Pressed Techniques

Keshvad, Alireza; Hooshmand, Tabassom; Farokh, Asefzadeh; Khalilinejad, Foroogh; Alihemmati, Mohammad; Noort, Richard van

doi:10.1111/j.1532-849x.2011.00745.x

Cited by 91 publications

(112 citation statements)

References 24 publications

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“…Possible disadvantages of aesthetic silicate ceramic inlays are demonstrated by reports of breakage and chipping [40,41]. The fracture load values in the present study of PCG ceramic inlays are in accordance with the findings of these studies [40,41]. This explains the continued search for materials with higher fracture resistance.…”

Section: Discussionsupporting

confidence: 90%

“…Clinical failure rate, aesthetic outcome and stabilisation of tooth substance are favourable for ceramics [16,17,40], whereas direct composite fillings exhibit lower marginal integrity in clinical practice and produce a lower stabilisation effect on remaining tooth substance [40,41]. Possible disadvantages of aesthetic silicate ceramic inlays are demonstrated by reports of breakage and chipping [40,41]. The fracture load values in the present study of PCG ceramic inlays are in accordance with the findings of these studies [40,41].…”

Section: Discussionmentioning

confidence: 99%

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Marginal adaptation, fracture load and macroscopic failure mode of adhesively luted PMMA-based CAD/CAM inlays

et al. 2016

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OBJECTIVES To evaluate marginal adaptation, fracture load and failure types of CAD/CAM polymeric inlays. METHODS Standardized prepared human molars (48) were divided into four groups (n=12): (A) PCG (positive control group); adhesively luted glass-ceramic inlays, (B) TRX; CAD/CAM polymeric inlays luted using a self-adhesive resin cement, (C) TAC; CAD/CAM polymeric inlays luted using a conventional resin cement, and (D) NCG (negative control group); direct-filled resin-based composite restorations. All specimens were subjected to a chewing simulator. Before and after chewing fatigue, marginal adaptation was assessed at two interfaces: (1) between dental hard tissues and luting cement and (2) between luting cement and restoration. Thereafter, the specimens were loaded and the fracture loads, as well as the failure types, were determined. The data were analysed using three-and one-way ANOVA with post hoc Scheffé test, two sample Student's t-test (p<0.05). RESULTS Before and after chewing fatigue, marginal adaptation for interface 1 showed significantly better results for TRX and PCG than for TAC (p=0.001-0.02) and NCG (p=0.001-0.047). For interface 2, marginal adaptation for TAC was significantly inferior to TRX (p<0.001) and PCG (p<0.001). Chewing fatigue had a negative impact on the marginal adaptation of TAC and NCG. No significant differences in fracture load were found between all tested groups. SIGNIFICANCE Self-adhesive luted polymeric CAD/CAM inlays showed similar marginal adaptation and fracture load values compared to adhesively luted glass-ceramic inlays. CAD/CAM polymeric inlays luted using a self-adhesive resin cement, C) TAC; CAD/CAM polymeric inlays luted using a conventional resin cement, and D) NCG (negative control group); direct-filled resin-based composite restorations. All specimens were subjected to a chewing simulator. Before and after chewing fatigue, marginal adaptation was assessed at two interfaces: 1) between dental hard tissues and luting cement and 2) between luting cement and restoration. Thereafter, the specimens were loaded and the fracture loads, as well as the failure types, were determined. The data were analysed using three-and one-way ANOVA with post-hoc Scheffé test, two sample Student's t-test and Weibull statistics (p < 0.05).Results: Before and after chewing fatigue, marginal adaptation for interface 1 showed significantly better results for TRX and PCG than for TAC (p = 0.001 -0.02) and NCG (p = 0.001 -0.047). For interface 2, marginal adaptation for TAC was significantly inferior to TRX (p < 0.001) and PCG (p < 0.001). Chewing fatigue had a negative impact on the marginal adaptation of TAC and NCG. No significant differences in fracture load were found between all tested groups. Group TAC showed the highest Weibull moduli (m = 4.49) and group PCG the lowest (m = 2.78).Significance: Self-adhesive luted polymeric CAD/CAM inlays showed similar marginal adaptation and fracture load values compared to adhesively luted glass-ceramic inlays.3

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Marginal adaptation, fracture load and macroscopic failure mode of adhesively luted PMMA-based CAD/CAM inlays

et al. 2016

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“…30 The accuracy of fitting to the underlying tooth structure is an essential consideration and could affect the longevity of restorations. 31,32 Larger gaps are associated with accelerated plaque accumulation, secondary caries, marginal discoloration, exposure of the luting resin, dissolution of the cement, and increased risk of microleakage and microcracks. [33][34][35] When the marginal gap is greater than 100 mm, removing excess cement is more difficult.…”

Section: Discussionmentioning

confidence: 99%

“…Correcting the contact points intraorally may negatively affect the esthetics of the restoration, the contact distribution, the chairside time, and the longevity. 31,32 In this study, the point-by-point differences were measured between the digitally acquired data and the milled restoration caused by the milling process. With the method reported, the inner and outer surfaces could be measured in addition to the internal fit.…”

Section: Discussionmentioning

confidence: 99%

A 3-dimensional accuracy analysis of chairside CAD/CAM milling processes

Bosch

Ender

Mehl

2014

The Journal of Prosthetic Dentistry

122

102

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“…Adherent surfaces of the teeth were etched with 37% phosphoric acid (30 s for enamel that remained at the occlusal surfaces, 15 s for dentine), rinsed with water, and then gently air-dried to remove excess water, leaving the cavity visibly wet. 1,11 Teeth surfaces were conditioned with Syntac Primer for 15s, air-dried, Syntac Adhesive for 10s, air-dried, and then Heliobond (Ivoclar Vivadent) was applied, airthinned but not lightcured, respectively according to the manufacturer's instructions (Variolink N, Ivoclar). The intaglio surfaces of the inlays were etched with 4.9% hydrofluoric acid (IPS Ceramic Etching gel; Ivoclar Vivadent) for 20 s and were rinsed with water for 60 s, then air-dried.…”

Section: Cementation Proceduresmentioning

confidence: 99%

Evaluation of adaptation of ceramic inlays using optical coherence tomography and replica technique

2018

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Optical coherence tomography (OCT) has generally been used as a nondestructive technique to evaluate integrities of composite restorations. We investigated marginal and internal adaptations of ceramic inlay restorations with OCT and compared them to results with the silicone replica technique. Round-shaped class I cavities were prepared on 16 human maxillary first premolar teeth. Ceramic inlays were fabricated. Silicone replicas from inlays were obtained and sectioned to measure marginal and internal adaptations with a stereomicroscope (Leica Dfc 295, Bensheim, Germany). Inlays were cemented on respective teeth. Marginal and internal adaptations were then measured with the OCT system (Thorlabs, New Jersey, USA) in 200-μm intervals. Replica and OCT measurements were compared with independent samples t-tests. A paired t-test was used to evaluate the marginal and internal adaptations of each group (p < 0.05). Marginal and internal adaptations were 100.97 ± 31.36 and 113.94 ± 39.75 μm, respectively, using the replica technique and 28.97 ± 17.86 and 97.87 ± 21.83 μm, respectively, using OCT. The differences between the techniques were significant (p = 0.00 and p = 0.01, respectively). On evaluation within the groups, internal adaptation values were found to be significantly higher than the marginal adaptation values for the replica technique (p = 0.00) and OCT (p = 0.00). Therefore, the replica and OCT techniques showed different results, with higher values of marginal and internal adaptation found with the replica technique. Marginal and internal adaptation values of ceramic inlays, whether measured by replica or OCT techniques, were within clinically acceptable limits.

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Marginal Gap, Internal Fit, and Fracture Load of Leucite-Reinforced Ceramic Inlays Fabricated by CEREC inLab and Hot-Pressed Techniques

Abstract: The leucite-reinforced glass ceramic inlay restorations fabricated by CEREC inLab (CAD/CAM) and the hot-pressed technique provided clinically acceptable marginal and internal fit with comparable fracture loads after luting.

Cited by 91 publications

References 24 publications

Marginal adaptation, fracture load and macroscopic failure mode of adhesively luted PMMA-based CAD/CAM inlays

Marginal adaptation, fracture load and macroscopic failure mode of adhesively luted PMMA-based CAD/CAM inlays

A 3-dimensional accuracy analysis of chairside CAD/CAM milling processes

Evaluation of adaptation of ceramic inlays using optical coherence tomography and replica technique

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