Clinical and quantitative marginal analysis of feldspathic ceramic inlays at 4 years

Friedl, Karl‐Heinz; Hiller, Karl‐Anton; Schmalz, Gottfried; Bey, B

doi:10.1007/s007840050028

Cited by 15 publications

(11 citation statements)

References 21 publications

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“…Our results are supported by similar clinical findings [9]. The use of both silane and bonding agent from different manufacturers, as accomplished in our study, might have negatively influenced the results probably due to chemical incompatibility between products.…”

Section: Discussionsupporting

confidence: 91%

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

2006

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The aim of this study was to evaluate the marginal adaptation of CEREC ceramic inlays, CEREC composite inlays and direct composite restorations in unbeveled proximal slot cavities under artificial aging conditions. Two groups of each restoration type were prepared (n=6), one group with a self-etch adhesive, the other group with H 3 PO 4 enamel etching before the self-etch adhesive application. Replicas were generated before and after long-term thermo-mechanical loading under dentinal fluid simulation and margins were evaluated at ×200 magnification in the scanning electron miscroscope (SEM). Statistically, significant differences were found before and after loading with respect to the percentages of "continuous margins", the direct composite filling with H 3 PO 4 enamel etching giving the lowest percentages of "continuous margins" after loading (p<0.05). The highest percentage of "continuous margin" was attained by composite inlays without H 3 PO 4 enamel etching. However, these results were not significantly different from ceramic inlays after stressing. Polymerization shrinkage is still one critical property of composite restorative materials. The marginal adaptation of indirect adhesive proximal slot restorations without enamel bevels both fabricated out of composite and ceramic is better than that of directly placed composite restorations.

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Section: Discussionsupporting

confidence: 91%

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

2006

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“…However, if a gap occurs at this interface, discoloration may lead to an unsightly delineation of the crown margin. 7 Initial values of 70%, which decreased after thermomechanical loading to values of approximately 40%, were unexpected. Therefore, a second researcher, who was again blinded to group assignment of the specimens, repeated all measurements.…”

Section: Discussionmentioning

confidence: 94%

Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of lithia disilicate-based all-ceramic crowns

Forberger

Göhring²

2008

The Journal of Prosthetic Dentistry

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Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of Lithia disilicate-based all-ceramic crowns Forberger, N; Göhring, T N Forberger, N; Göhring, T N (2008). Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of Lithia disilicate-based all-ceramic crowns. Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of Lithia disilicate-based all-ceramic crowns Abstract STATEMENT OF PROBLEM: The influence of different crown foundations on marginal seal and fracture resistance of ceramic crowns placed on endodontically treated teeth has not been clearly established. PURPOSE: The purpose of this study was to evaluate the marginal continuity and fracture behavior of high-strength all-ceramic crowns with different substructures in endodontically treated premolars. MATERIAL AND METHODS: Forty-eight human mandibular premolars were assigned to 6 groups, including a no-treatment group (UNTREATED) and a group for which the access cavity was restored with composite resin (Tetric Ceram) (COMP). In the remaining 4 groups, teeth were prepared to receive all-ceramic crowns with 0.8-mm-wide shoulders and axial dentin heights of 2 mm. No posts were used in the ENDOCROWN group. Glass fiber posts (FRC Postec) were used in group FRC-POST. Group ZRO-POST received zirconia ceramic posts (CosmoPost), and group GOLD-POST received cast gold posts (CM). Experimental lithia disilicate ceramic crowns were made and adhesively cemented (Variolink). All teeth were subjected to thermal cycling and mechanical loading (TCML) in a masticatory simulator (1,200,000 loads, 49 N, 1.7 Hz, 3000 temperature cycles of 5 degrees C-50 degrees C-5 degrees C). Marginal continuity was evaluated with scanning electron microscopy at x200. All specimens were loaded to failure in a universal testing machine at 0.5 mm/min after TCML. Data were analyzed using 1-way ANOVA and post hoc t tests with Bonferroni correction (alpha=.05). Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of Lithia disilicate-based all-ceramic crowns Abstract STATEMENT OF PROBLEM: The influence of different crown foundations on marginal seal and fracture resistance of ceramic crowns placed on endodontically treated teeth has not been clearly established. PURPOSE: The purpose of this study was to evaluate the marginal continuity and fracture behavior of high-strength all-ceramic crowns with different substructures in endodontically treated premolars. MATERIAL AND METHODS: Forty-eight human mandibular premolars were assigned to 6 groups, including a no-treatment group (UNTREATED) and a group for which the access cavity was restored with composite resin (Tetric Ceram) (COMP). In the remaining 4 groups, teeth were prepared to receive all-ceramic crowns with 0.8-mm-wide shoulders and axial dentin heights of 2 mm. No posts were used in the ENDOCROWN group. Glass fib...

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“…Although all-ceramic restorations are well documented and clinically proven, [3][4][5][12][13] the topics mentioned above are still of importance, and gap width accuracy is a major factor influencing clinical performance and lifetime of a restoration. The laboratory processed IPS Empress Esthetic (Ivoclar Vivadent, Schaan, Liechtenstein) and the chairside procedure with Cerec 3D (Sirona, Bensheim, Germany) are two well established all-ceramic systems.…”

Section: Introductionmentioning

confidence: 99%

Marginal Fit of Heat-pressed vs CAD/CAM Processed All-ceramic Onlays Using a Milling Unit Prototype

Reich¹,

Gozdowski²,

Trentzsch³

et al. 2008

Operative Dentistry

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Operative Dentistry, 2008, 33-6, 644-650 SUMMARYThe composite luting gap between ceramic and dental hard tissue can be termed an "Achilles heel." Therefore, one major goal of luting ceramics focuses on minimizing the inter-marginal gap area. This study evaluated the marginal accuracy of two all-ceramic systems. The null hypothesis was that there is no statistical difference between the marginal accuracy of the IPS Empress and Cerec 3D all-ceramic systems.On 16 casts, representing different clinical situations, the left first mandibular molar was prepared to receive large onlays (MOD and replacement of the distobuccal and distal cusps). For each cavity, one laboratory heat-pressed (IPS Empress) and one chairside CAD/CAM restoration (Cerec 3D) were manufactured. A newly developed milling unit was used for CAM processing. The restorations were placed in their respective cavities and die replicas were taken and examined under SEM for quantitative gap measurement. The gap width was measured at 11 defined landmarks by two different examiners.An overall gap width of 56 µm (± 31 µm) was measured for IPS Empress, compared to the significantly increased value of 70 µm (± 32 µm) forThe marginal fit of all-ceramic restorations has an important influence on the clinical performance and lifetime of adhesively luted restorations. In proximal boxes, an average marginal gap of less than 100 µm is claimed. These clinical requirements are fulfilled by both processing procedures.

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Clinical and quantitative marginal analysis of feldspathic ceramic inlays at 4 years

Cited by 15 publications

References 21 publications

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

Influence of the type of post and core on in vitro marginal continuity, fracture resistance, and fracture mode of lithia disilicate-based all-ceramic crowns

Marginal Fit of Heat-pressed vs CAD/CAM Processed All-ceramic Onlays Using a Milling Unit Prototype

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