Restorative material and loading type influence on the biomechanical behavior of wedge shaped cervical lesions

Pereira, Fabrícia Araújo; Zeola, Livia Fávaro; Milito, Giovana de Almeida; Reis, Bruno Rodrigues; Pereira, Rodrigo Dantas; Soares, Paulo Vinícius

doi:10.1007/s00784-015-1523-3

Cited by 19 publications

(35 citation statements)

References 43 publications

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“…With a sphere, the axial load can have slanting components in the cusps enhancing the probability of damage. The threedimensional model used in this FEA study can be validated due to in vitro studies evaluating the premolar behavior using strain gauges [25] or compressive test [26,27], showed similar results, observing a higher concentration of stress on the lingual cusp for all groups (Figure 2).…”

Section: Discussionmentioning

confidence: 68%

Biomechanical behavior of indirect composite materials: a 3D-FEA study

Tribst

2017

BDS

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Objetivo: This study aimed to evaluate the influence of the elastic modulus of indirect composite resins (ICR) in the stress distribution of a restored maxillary first premolar. Material and methods: A three-dimensional (3D) finite element model of the tooth and the mesialocclusal-distal (MOD) restoration was created. Three ICR were simulated, by changing the elastic modulus: 10, 15 and 20 GPa. All materials were considered as isotropic, homogeneous and linearly elastic. An occlusal load (200 N) was applied on occlusal surface trough a sphere, and the nodes of the external surface of the root were fixed. The maximum principal stresses on the tooth and restoration were analyzed. Results: According to FE analysis, the lower the ICR elastic modulus, the higher the tensile stress values generated on the remaining tooth. For the restoration, the opposite was observed: the lower the modulus, the lower the tensile stress. Conclusion: With the limitations of this study it is possible to conclude that the greater the elastic modulus of the restorative material the harder it will be to deflect the cusps, but the easier the fracture of the resin. RESUMOObjective: Este estudo teve como objetivo avaliar a influência do módulo de elasticidade de resinas compostas indiretas (RCI) na distribuição de tensão de um primeiro pré-molar superior restaurado. Materiais e métodos: Um modelo de elemento finito tridimensional (3D) de um dente com restauração mesio-ocluso-distal (MOD) foi utilizado. Foram simulados três RCI, alterando o módulo de elasticidade: 10, 15 e 20 GPa. Todos os materiais foram considerados isotrópicos, homogêneos, lineares e elásticos. Uma carga axial (200 N) foi aplicada na superfície oclusal através de uma esfera, e os nós da superfície externa das raízes foram fixados. Foi analisada a Tensão Máxima Principal no dente e na restauração. Resultados: De acordo com a análise, quanto menor for o módulo elástico da RCI, maiores são os valores de tensão de tração gerados no dente. Para a restauração, observou-se o oposto: quanto menor o módulo, menor a tensão de tração. Conclusão: Com as limitações deste estudo, é possível concluir que quanto maior o módulo de elasticidade do material restaurador, mais difícil será a deflexão das cúspides, mas, a fratura da resina será mais fácil. O R I G I N A L A R T I C L EBiomechanical behavior of indirect composite materials: a 3D-FEA study PAlAvRAS-ChAvEAnálise por elementos finitos; Resina composta; Restauração indireta.

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Section: Discussionmentioning

confidence: 68%

Biomechanical behavior of indirect composite materials: a 3D-FEA study

Tribst

2017

BDS

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“…Non-carious cervical lesions involve the loss of hard dental tissues in the cervical areas of the teeth, without carious activity [1,2]. These lesions are important because, in a first stage, they can produce gingival retractions associated with teeth sensitivity [3], and in an advanced stage they can determine endodontic pathology and even the fracture of the teeth involved [4]. Furthermore, non-carious cervical lesions are important because of their high prevalence (5-85%) [5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of stress generated in the enamel of an upper first premolar: a finite element study

Stănuşi¹,

Mercuț²,

Scrieciu³

et al. 2020

EDUJ

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This study investigated the distribution and magnitude of stress generated in the enamel of an upper first premolar, after applying normal and excessive occlusal loads in a vertical and horizontal direction, using Finite Element Analysis (FEA). Methodology: A 3D virtual model of an upper first premolar was analyzed. The CT images of the tooth were converted into 3D data using the program MIMICS and Finite Element Analysis (FEA) was used for the stress study. To better understand the distribution of stress generated by occlusal loading, the situation of the enamel in various 3D virtual models was presented. 14 scenarios for the occlusal loading of the virtual models of the upper first premolar were obtained and the areas with the highest concentration of stress were emphasized. Results: In the model with the tooth intact, stress values were higher than the admissible ones in the simulation of the excessive vertical loading, normal horizontal loading and excessive horizontal loading. Stress was found in the buccal cusp area and in the cervical area, mainly on the buccal side of the tooth. In the models with horizontal occlusal tooth wear, stress values were higher than the admissible ones in the simulation of the excessive vertical loading. Stress was found in the cervical area. In the models with oblique occlusal tooth wear, stress values were higher than the admissible ones in the simulation of the normal and excessive horizontal loading. Stress was found mainly in cervical area, on the buccal side of the tooth. Conclusions: The most harmful loads were the heavy vertical ones and the horizontal ones, no matter the magnitude.

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“…Dental caries is still epidemic and a significant public health problem in many developing countries [1]. Sri Lanka is one of developing countries in South Asia, and the children's oral health is in poor condition [2][3][4]. According to the 2015-16 National Oral Health Survey, the prevalence of dental caries in 5 year-old children was 63.1%, and the prevalence of untreated active caries was 60.7%.…”

Section: Introductionmentioning

confidence: 99%

“…There are four paired paranasal sinuses: the maxillary, frontal and sphenoid sinuses, and the ethmoid cells, with great inter-and intra-individual variations. Shape and size of the paranasal sinuses are probably the most variable of all the anatomical structures of the entire body [3,4]. Genetic diseases, infectious and environmental conditions may influence these variations [5].…”

Section: Introductionmentioning

confidence: 99%