Effect of the crown design and interface lute parameters on the stress-state of a machined crown–tooth system: A finite element analysis

Shahrbaf, Shirin; vanNoort, Richard; Mirzakouchaki, Behnam; Ghassemieh, Elaheh; Martín, Nicolás

doi:10.1016/j.dental.2013.04.002

Cited by 31 publications

(31 citation statements)

References 28 publications

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“…All-ceramic crowns' stress distributions were evaluated on posterior tooth in previous studies. 1,9,[12][13][14]16,18 Among these studies the results of the marginal preparation type comparison studies reported that chamfer preparation type shows more uniform stress distribution than shoulder preparation types in accordance with our results. 9,12,13 In addition our results revealed that Von Mises stresses decreased from the ceramic layers to the tooth structure.…”

Section: Discussionsupporting

confidence: 79%

“…Chamfer and rounded shoulder marginal preparation designs are mostly preferred for all ceramic restorations and reported to transfer a minimum of masticatory stress from the coping into the veneering porcelain. 20,21 Preparation design of restorations have been studied either on posterior tooth 1,9,[12][13][14]16,18 or on porcelain laminate veneers 15,17,19 by three dimensional (3D) FEA. However, there is not enough evidence to decide which design offers better stress distribution within all ceramic restoration of an anterior tooth.…”

Section: Introductionmentioning

confidence: 99%

“…1,10,11 However, Finite Element Analysis (FEA) allows investigation of stress distributions through model simulations, could be used to examining the role of design variations. 9,[12][13][14][15][16][17][18][19] Most model simulations were simplified and ignored the behavior of components of the tooth-crown systems. The importance of anatomically correct model to give clinically relevant results is well documented.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Marginal Preparation Type on an All-Ceramic Anterior Crown: A Finite Element Study

Türk¹

2017

Cumhuriyet Dental Journal

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A B S T R A C TObjectives: The aim of the study was to evaluate and compared the effects of 2 different tooth preparation designs on the stress distribution in tooth, cement, core and two ceramic layers of all ceramic anterior crown using the 3 Dimensional (3D) Finite-Element-Analysis (FEA) method. Anterior tooth-crown configuration composed of both layers of restoration is lacking.Materials and Methods: 1 mm circumferential shoulder and chamfer finish line preparations were performed with rounded shoulder and chamfer diamond cylindrical burs with rounded angles on 2 maxillary central teeth. 1 mm thickness of the frameworks were (IPS e.max Press, Ivoclar-Vivadent, Schaan, Liechtenstein) prepared by pressing technique. After scanning the frameworks for FEA, dentin and enamel ceramics (IPS e.max Ceram, Ivoclar-Vivadent) were applied. Each ceramic layer was scanned for finite-element models. The Variolink II (IvoclarVivadent) was used as a luting material and modeled. A 200 N static load was applied at 45° to the palatal surface. 3D-FEA was performed with I-DEAS software.Results: Rounded-shoulder model showed higher Von Mises stress values in prepared tooth, core, resin cement, and both two layers of the ceramic than chamfer model. Roundedshoulder preparation type within all evaluated models had more dispersed stress distribution localization areas than chamfer preparation type's models. The highest Von-Mises stress values were found within the first ceramic layer of the shoulder model (26.5 MPa) on 1/3 of the buccal surface. Low stress values were found at dentin tooth structures for both chamfer and rounded-shoulder models.Conclusions: Rounded-shoulder preparation type showed higher Von-Mises stress values at both layers of crown. Minimum Von-Mises stress values were found at dentin regardless of the preparation type.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Marginal Preparation Type on an All-Ceramic Anterior Crown: A Finite Element Study

Türk¹

2017

Cumhuriyet Dental Journal

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“…There are studies reporting that the higher the cement's E-Modulus, the lower the distribution of the tension within the restoration will be 21) . In addition, the E-Modulus is reported to be more decisive than the cement layer thickness 6) . In this study, spacer parameter was set to 80 µm, which is in good accordance with recommendations reported in literature 21) .…”

Section: Discussionmentioning

confidence: 99%

“…The material characteristics of ceramics have been shown to significantly depend on prior thermal and mechanical fatigue loading 4) . Four factors have been identified to mainly influence the fracture resistance of all-ceramic restorations: restoration design, tooth preparation, cementation and material thickness [5][6][7][8][9] . The fracture resistance can be increased by an ideal combination of these four factors, however, the factors restoration material and material thickness have been reported to be of primary importance 10) .…”

Section: Introductionmentioning

confidence: 99%

Influence of material thickness on fractural strength of CAD/CAM fabricated ceramic crowns

Zimmermann

Egli

Zaruba

et al. 2017

Dental Materials Journal

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The fracture behavior of CAD/CAM fabricated crowns was investigated as a function of material thickness for six silicate ceramic materials: Mark II, e.max CAD, Celtra Duo milled, Celtra Duo fired, Suprinity, Enamic. Crowns with thicknesses 0.5/1.0/1.5 mm were fabricated with CEREC and adhesively seated to dies fabricated with stereolithography technology (n=144). Thermomechanical loading and fractural loading was performed. Statistical analysis was done with one-way ANOVA and post-hoc Scheffé test. For 1.5 mm, all crowns survived fatigue testing, for 1.0 mm, survival was 100% only for materials e.max CAD and Suprinity. For 0.5 mm, best survival rate was 37.5% for Suprinity. Maximum fractural loading significantly varied among the groups. For 0.5 mm, highest value was found for Suprinity (660.1 N). Mark II showed lowest values for 1.0 mm (482.0 N), and 1.5 mm groups (634.8 N). e.max CAD showed highest values for 1.0 mm (774.2 N), and 1.5 mm groups (1,240.8 N).Keywords: Feldspathic ceramic VITA Mark II, Lithium disilicate ceramic e.max CAD, Zirconia-reinforced lithium silicate ceramic Celtra Duo and VITA Suprinity, Hybrid ceramic VITA Enamic, CERECColor figures can be viewed in the online issue, which is available at J-STAGE.

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Luting, Cements and Bonding

Field¹,

Barbour

Wassell

2018

BDJ Clinician’s Guides

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Effect of the crown design and interface lute parameters on the stress-state of a machined crown–tooth system: A finite element analysis

Cited by 31 publications

References 28 publications

The Effect of Marginal Preparation Type on an All-Ceramic Anterior Crown: A Finite Element Study

The Effect of Marginal Preparation Type on an All-Ceramic Anterior Crown: A Finite Element Study

Influence of material thickness on fractural strength of CAD/CAM fabricated ceramic crowns

Luting, Cements and Bonding

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