Finite element analysis of stress distribution in intact and porcelain veneer restored teeth

Matson, Maurício Rufaiel; Lewgoy, Hugo Roberto; Filho, Djalma de Albuquerque Barros; Amore, Ricardo; Anido-Anido, A.; Alonso, Roberta Caroline Bruschi; Carrilho, Marcela Rocha de Oliveira; Anauate-Netto, Camillo

doi:10.1080/10255842.2011.561013

Cited by 16 publications

(14 citation statements)

References 24 publications

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“…The following assumptions were adopted: (i) full bonding between the veneer and tooth, (ii) “tied” restriction type between the tooth structure and periodontal ligament, (iii) linear elastic behavior for all homogeneous, isotropic structures, as characterized by Young's modulus ( E ) and Poisson's ratio (Table ), (iv) immobilized boundary condition of the alveolar bone with restriction of 6 degrees of freedom, and (v) constraint nasal lamina of the incisor, in order to better simulate real clinical conditions. All elements of the external surface of the cortical bone on mesial and distal extremities of the model were restricted from any movement.…”

Section: Methodsmentioning

confidence: 99%

Influence of Preparation Depth and Design on Stress Distribution in Maxillary Central Incisors Restored with Ceramic Veneers: A 3D Finite Element Analysis

Tsouknidas

Karaoglani

Michailidis

et al. 2019

Journal of Prosthodontics

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Purpose: To evaluate the influence of different preparation designs and depths on the stress field developed in maxillary central incisors restored with veneers made with different ceramic materials using finite element analysis (FEA). Materials and Methods:A linear static three-dimensional finite element analysis model was used with the aid of reverse engineering to develop digital models of maxillary central incisors restored with ceramic veneers, according to two different preparation depths (thin vs deep) and two different preparation designs (feather edge vs butt joint). Three ceramic systems were tested: (i) feldspathic porcelain, (ii) heat pressed glass ceramic IPS Empress 2 (Ivoclar Vivadent AG), and (iii) heat pressed glass ceramic IPS e.max-Press (Ivoclar Vivadent AG). Each model was subjected to a compressive force of 200N applied to the palatal surface 2 mm below the incisal edge. The longitudinal axis of the restored tooth formed an angle of 130 o with the direction of the force. The biomechanical behavior of the different models was examined according to the von Mises stress criterion. Statistical analysis was performed using nonparametric confidence interval estimation using bootstrapping. Results: The maximum observed stress values were calculated and found to be similar between prepared and intact teeth. The cervical margin of the veneers displayed the highest von Mises stress values. Irrespectively of the depth and preparation design, the biggest von Mises stress values were observed at the veneer structures with the following order: (i) IPS Empress 2, (ii) IPS e.max-Press, (iii) feldspathic (p = 0.001). Preparation depth resulted in statistically significant differences (p = 0.001) in the stress distribution in the majority of tested structures. As the preparation depth was increased, the stresses within the veneer structure and the tooth structures were decreased. No statistically significant differences were detected in the stresses among the different restored models, when the preparation design was considered. Conclusions: This FEA study suggests that ceramic veneers could restore the biomechanical behavior of prepared central incisors and made it similar of that of an intact tooth. Regardless of the preparation depth and design and the ceramic system used, the cervical margin of ceramic veneers presents the highest von Mises stress values. When feldspathic porcelain was compared with lithium disilicate (IPS e.max Press), the latter displayed the lowest transfer of stresses to dental tissues. An increase in preparation depth resulted in a statistically significant stress decrease in both the veneer and the tooth.

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Section: Methodsmentioning

confidence: 99%

Influence of Preparation Depth and Design on Stress Distribution in Maxillary Central Incisors Restored with Ceramic Veneers: A 3D Finite Element Analysis

Tsouknidas

Karaoglani

Michailidis

et al. 2019

Journal of Prosthodontics

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“…The next big advantage of CT model rendering consists of the possibility to scan the same structure Finite Element Analysis in Dental Medicine 7 before and after the performed therapy procedures, and periodical follow-ups of the therapy success. Technologies such as micro-CT scanning open up the possibility for complex 3D modeling [11]. However, the process of going from image to mesh involves a number of processing steps, each with potential geometric errors [12].…”

Section: Finite Element Modelmentioning

confidence: 99%

“…Teeth totally recover their properties when veneers are placed as a partial enamel substitute. The use of ceramic Finite Element Analysis in Dental Medicine 13 was a key element since the elasticity modulus of porcelains is matched well with enamel [11].…”

Section: Dental Restorationsmentioning

confidence: 99%

“…The consequences of the same chewing force for different teeth also need to be highlighted because structural Finite Element Analysis in Dental Medicine 9 changes can occur depending upon the magnitude of the force, which can affect the tooth morphology in extreme (premature contacts) or repetitive cases (fatigue) [11].…”

Section: Materials and Types Of Reconstructions In Dental Medicinementioning

confidence: 99%

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Finite Element Analysis in Dental Medicine

Borčić¹,

Braut²

2012

Finite Element Analysis - New Trends and Developments

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“…As an important connective soft tissue, the PDL transmits orthodontic force from the tooth to the alveolar bone, resulting in tooth movement. Even though the PDL is known to represent a nonlinear viscoelastic behavior, many literatures [12][13][14][15] assumed a linear elastic behavior for the PDL in FE analysis. The hyperelastic, viscoelastic, and biphasic poroelastic behaviors are also adopted to descript the mechanical properties of the PDL under different loading conditions [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influences of bracket and force system in different directions on the moment to force ratio by finite element method

Tang

2018

J Wireless Com Network

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The human teeth face a variety of ways to move during orthodontic treatment. The types of orthodontic tooth movements have linked to the moment to force (M/F) ratio. This paper aims to determine the precise M/F ratios that generate different types of movements for the models with and without bracket, and the M/F ratios are compared between the force systems applied in buccal-lingual and distal-mesial direction for the mandible canine by using finite element method (FEM). A segment of mandible canine obtained from autopsy had been scanned with microcomputed tomography, and two finite element models with and without brackets were established. Each canine model was subjected to a force of 100 cN and varied M/F ratios from 0~12 in buccal-lingual and distal-mesial directions. We find that the model with a bracket required larger M/F ratio compared to the model without a bracket for the same tooth movement. For the different directions, the value of M/F ratio is larger in the buccal-lingual than in the distal-mesial direction. The geometry of the tooth and the PDL are gained from a regular patient. Therefore, the results are applicable to any canine, and the precise M/F values provide a theoretical basis for the orthodontist design optimal force system.

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Finite element analysis of stress distribution in intact and porcelain veneer restored teeth

Abstract: The presence of a veneer restoration on the incisors is a good alternative to mimic the behaviour of enamel under protrusion loading conditions. The use of veneers to replace enamel during rehabilitations is recommended.

Cited by 16 publications

References 24 publications

Influence of Preparation Depth and Design on Stress Distribution in Maxillary Central Incisors Restored with Ceramic Veneers: A 3D Finite Element Analysis

Influence of Preparation Depth and Design on Stress Distribution in Maxillary Central Incisors Restored with Ceramic Veneers: A 3D Finite Element Analysis

Finite Element Analysis in Dental Medicine

Analysis of the influences of bracket and force system in different directions on the moment to force ratio by finite element method

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