Effect of Direct and Indirect Materials on Stress Distribution in Class II MOD Restorations: A 3D-Finite Element Analysis Study

Alp, Şemsi; Alagoz, Laden Gulec; Ulusoy, Nuran

doi:10.1155/2020/7435054

Cited by 10 publications

(12 citation statements)

References 47 publications

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“…Alp et al prepared three class II models using an adhesive layer with a thickness of 30 micrometers [ 49 ]. In the first model, amalgam (M1) was placed on the adhesive and in the second model glass carbomer cement (M2), and in the third model, 1 mm thick resin modified glass ionomer cement was placed on it, followed by a 30-micrometer-thick adhesive material and then resin composite (M3).…”

Section: Discussionmentioning

confidence: 99%

Investigation of the Effects of Adhesive Materials of Different Types and Thicknesses on Dental Tissue Stress via FEM Analysis

Gönder

Mohammadi

Harmankaya

et al. 2022

BioMed Research International

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The aim of this study was to investigate the types and thicknesses of adhesive materials used in restorative treatment in dentistry in class I occlusal and class II disto-occlusal cavities and to examine the effects of stress distribution on enamel, dentin, restoration material, and adhesive material using the finite element stress analysis method. A 3-dimensional geometry of the tooth was obtained by scanning the extracted 26 numbered upper molar tooth with dental tomography. The 3D geometry obtained by using the Geomagic Design X 2020.0 software was divided into surfaces, and necessary arrangements were made. With the Solidworks 2013 software, 2 different cavity modeling, class I occlusal and class II disto-occlusal, with a cavity angle of 95 degrees on the 3D model, as well as 10, 30, and 50 micrometers thick, four types of adhesive materials and the modeling of the bulk-fill composite material on it were made. With finite element stress analysis, the stress distribution was analyzed using the Abaqus software. The materials used in the study are included in the simulation as isotropic linear elastic. Periodontal ligament and jawbone were not included in the analysis. A total of 600 N pressure was applied on the models. In our study, it was observed that the amount of stress on the tooth structures changed when the thickness, elastic modulus, and Poisson ratios of the adhesive material were changed. In addition, when all models are examined, it is seen that when the thickness is increased, more stress is placed on the adhesive material compared to the restoration, while when 50-micrometer-thick adhesive material is used, more stress is placed on the restoration compared to the adhesive material.

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Section: Discussionmentioning

confidence: 99%

Investigation of the Effects of Adhesive Materials of Different Types and Thicknesses on Dental Tissue Stress via FEM Analysis

Gönder

Mohammadi

Harmankaya

et al. 2022

BioMed Research International

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“…Although in vitro laboratory tests of extracted human teeth are important to obtain useful information about fracture load and the fracture mode, they are generally based on destructive experiments and have limited capacity to investigate the stress-strain relationship in the tooth restoration complex [ 38 , 39 ]. Therefore, 3D-FEA is an engineering tool that can be applied to biology, medicine and dentistry and used to investigate the mechanical behavior of complex systems by a mathematical approach and simulation [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Stress Concentration of Endodontically Treated Molars Restored with Transfixed Glass Fiber Post: 3D-Finite Element Analysis

et al. 2021

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The loss of dental structure caused by endodontic treatment is responsible for a decrease in tooth resistance, which increases susceptibility to fracture. Therefore, it is important that minimally invasive treatments be performed to preserve the dental structure and increase the resistance to fracture of endodontically treated posterior teeth. To evaluate under axial loads, using the finite element method, the stress distribution in endodontically treated molars restored with both transfixed or vertical glass fiber posts (GFP) and resin composite. An endodontically treated molar 3D-model was analyzed using finite element analyses under four different conditions, class II resin composite (G1, control model), vertical glass fiber post (G2), transfixed glass fiber posts (G3) and vertical and transfixed glass fiber posts (G4). Ideal contacts were considered between restoration/resin composite and resin composite/tooth. An axial load (300 N) was applied to the occlusal surface. The resulting tensile stresses were calculated for the enamel and dentin tissue from five different viewports (occlusal, buccal, palatal, mesial and distal views). According to the stress maps, similar stress trends were observed, regardless of the glass fiber post treatment. In addition, for the G1 model (without GFP), a high-stress magnitude can be noticed in the proximal faces of enamel (7.7 to 14 MPa) and dentin (2.1 to 3.3 MPa) tissue. The use of transfixed glass fiber post is not indicated to reduce the stresses, under axial loads, in both enamel and dentin tissue in endodontically treated molar with a class II cavity.

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“…The models were fixed at the inferior surface of the cortical bone in all directions. An axial occlusal loading of 600 N was applied on buccal cusp tips, central fossa, and distal marginal ridge [1,33,34], as provided in Figure 1A.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Therefore in this study, mandibular molar models with MOD cavities were used to evaluate the influence of preparation design and onlay material on stress distribution and fatigue behavior of onlay-tooth complex under static and cyclic conditions. An average axial force of 600 N was applied on the occlusal contact points [1,33,34]. The axial loading was applied to stimulate the normal force on mandibular molars.…”

Section: Safety Factorsmentioning

confidence: 99%

Effect of onlay material and preparation design on fatigue behavior and stress distribution in molars: 3D-FEA

Darwich¹,

Aljareh²,

Kanout³

et al. 2023

jos

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Introduction: Onlays are conservative restorations for posterior teeth that cover one cusp or more. Objectives: The aim of this study was to evaluate fatigue behavior and stress distribution in mandibular molars with different onlays and preparation designs under static and cyclic conditions, using finite element analysis. Material and methods: A model of a mandibular molar was obtained from a CBCT image. Mesio-occluso-distal cavities were presented with conservative and extensive buccolingual widths of the occlusal cavity. Buccal and lingual cusps were reduced. Therefore, onlays that covered buccal cusps and onlays that covered all cusps designs were obtained. All onlays were produced from three materials: lithium disilicate ceramic (LDS), polymer-infiltrated ceramic network (PICN), and zirconia ceramic. Safety factor was calculated and stress distribution was analyzed according to von Mises and maximum principal stress theories under static and cyclic conditions. Results: Cyclic loading caused higher stresses than static loading. The safety factor of zirconia and LDS onlays was higher than 1, except for conservative preparation with all-cusp coverage. PICN showed the lowest values of safety factors and the highest stress concentration in the dental tissues, which was associated with the least stresses in onlays. LDS and zirconia ceramic onlays showed lower stress concentration in dental structures than PICN. Conclusions: Loading conditions affected the results of stress in all models. Zirconia ceramic could be a suitable choice to restore mandibular molars, while PICN onlay might be an inappropriate restoration in terms of safety factors and stress distribution in restored dental structures.

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Effect of Direct and Indirect Materials on Stress Distribution in Class II MOD Restorations: A 3D-Finite Element Analysis Study

Cited by 10 publications

References 47 publications

Investigation of the Effects of Adhesive Materials of Different Types and Thicknesses on Dental Tissue Stress via FEM Analysis

Investigation of the Effects of Adhesive Materials of Different Types and Thicknesses on Dental Tissue Stress via FEM Analysis

Stress Concentration of Endodontically Treated Molars Restored with Transfixed Glass Fiber Post: 3D-Finite Element Analysis

Effect of onlay material and preparation design on fatigue behavior and stress distribution in molars: 3D-FEA

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