Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis

Jakupovic, Selma; Anić, Ivica; Ajanović, Muhamed; Korać, Samra; Konjhodžić, Alma; Džanković, Aida; Vuković, Amra

doi:10.4103/1305-7456.184166

Cited by 30 publications

(42 citation statements)

References 17 publications

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“…A detailed description of the methodology of the study was given in our paper published in Eur J Dent 2016; 10: 413-8. Biomechanics of the cervical tooth region and noncarious cervical lesions of different morphologies; a three-dimensional finite element analysis / Published by Wolters Kluwer -Medknow (9).…”

Section: Methodsmentioning

confidence: 99%

“…The presence of noncarious cervical lesions of different morphologies influences the biomechanics of the cervical tooth region. A three-dimensional finite element analysis (FEM) proved to be a good experimental model in research to help understand the complex biomechanics of different tooth regions in other teeth (9). The aim of this paper was to evaluate the influence of different occlusal loads on the mandibular first premolar in the process of the formation of cervical lesions.…”

Section: Morphological Characteristics Of the Mandibular First Premolarmentioning

confidence: 99%

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Occlusal Stress Distribution on the Mandibular First Premolar – Fem Analysis

et al. 2019

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Objective. The aim of this paper was to analyze the distribution of stress and deformation on the mandibular first premolar under two types of loading (axial and para-axial load of 200 N) using the FEM computer method. Materials and Method. For this research a µCT scan of the first mandibular premolar was used, and the method used in this research was FEM analysis under two types of loading. Results. The values of the von Mises stress measured in the cervical part of an intact tooth under axial load were up to 12 MPa, and under paraaxial load over 50 MPa. The values of the stress measured on the bottom of the noncarious lesion are very high ≈ 240 Mpa. Stress values in the cervical part of the intact tooth are higher in the zone of the sub-surface enamel. The deformation values of the tooth under para-axial loading were ≈ 10 times higher than the value of the deformation under axial load. The greatest deformations were seen in the area of the tooth crown. Conclusions. Occlusal loading leads to significant stress in the cervical part of teeth. The values of the measured stress are greater under the action of paraxial load. The values of stress in abfraction lesions measured under a paraxial load are extremely high. Exposing the lesion to further stress will lead to its deepening. The total deformation of the entire tooth under paraxial load was ≈ 10 times higher compared to the deformation value of the tooth under axial load.

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Section: Methodsmentioning

confidence: 99%

Section: Morphological Characteristics Of the Mandibular First Premolarmentioning

confidence: 99%

Occlusal Stress Distribution on the Mandibular First Premolar – Fem Analysis

et al. 2019

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“…The formation and/or progression of NCCLs could be caused by a multifactorial etiology [ 2 , 11 , 14 ]. Some studies have reported that malocclusion could generate an increased stress on the buccal and lingual cervical regions of a tooth than the normal occlusion [ 4 – 8 ]. Other clinical studies have reported an association between the existence of NCCLs and related factors, such as age, gingival recession, occlusion, tooth attrition, and group function [ 9 – 14 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the relationship between non-caries cervical lesions and the tooth and periodontal tissue: An ex-vivo study using micro-computed tomography

et al. 2020

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The purpose of this study was to analyze the relationship between the height and depth of buccal non-carious cervical lesions (NCCLs) and the relationship between the size of buccal NCCLs and clinical crown-root ratio of both buccal and lingual (palatal) sides using micro-computed tomography (micro-CT) images of the teeth and periodontal tissues from the cadavers. The micro-CT images of 56 teeth and their supporting tissues were obtained from 17 cadavers. From these images, the height and depth of NCCLs and the length of the buccal and lingual (palatal) clinical crowns were measured, and the conventional/modified clinical crown-root ratios were calculated. The height and depth ratio of NCCLs were analyzed statistically with the conventional/modified crown-root ratios by Pearson’s correlation and multiple regression. According to the Pearson’s correlation, the height and depth of buccal NCCLs were positively correlated with the modified buccal clinical crown-root ratio ( p < 0.001 and p = 0.013, respectively). The regression model composed of variables of crown-root ratios explained the height of buccal NCCLs, and the prominent factor of the model was the modified buccal clinical crown-root ratio ( p < 0.001). Moreover, the depth of buccal NCCLs was also explained by the regression model, and its prominent factor was the proportion of modified buccal and lingual (palatal) clinical crowns ( p = 0.004). The buccal NCCLs were related to the crown-root ratios; particularly, the level of buccal gingival margin could be associated with the formation of buccal NCCLs.

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“…To date, no 3D‐FEA examined the effect of different preparation designs, preparation depths and different ceramic materials on the biomechanical behavior of maxillary central incisors . The simultaneous interaction of multiple variables affecting the mechanical behavior of a restoration can be studied by means of simulation in a computerized model, as 3D‐FEA has been proven to be one of the most powerful and effective tools for that purpose .…”

mentioning

confidence: 99%

“…Three different restorative materials were considered. Additionally, incisors restored with porcelain veneers were compared with the natural intact tooth (control) . The null hypotheses were: (a) there is no difference between feldspathic porcelain, IPS Empress 2, and IPS e.max Press heat pressed glass ceramics in stress distribution, (b) there is no difference between “deep” and “minimal” preparation depths in stress distribution and (c) there is no difference between butt joint and feather‐edge preparation designs in stress distribution.…”

mentioning

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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Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis

Cited by 30 publications

References 17 publications

Occlusal Stress Distribution on the Mandibular First Premolar – Fem Analysis

Occlusal Stress Distribution on the Mandibular First Premolar – Fem Analysis

Evaluation of the relationship between non-caries cervical lesions and the tooth and periodontal tissue: An ex-vivo study using micro-computed tomography

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

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