Comparison of Stresses Generated within the Supporting Structures of Mandibular Second Molars Restored with Different Crown Materials: 3‐D Finite Element Analysis (FEA)

Abuelenain, Dalia A.; Ajaj, Reem; El‐Bab, Eman I. M. Fath; Hammouda, M.M.I.

doi:10.1111/jopr.12240

Cited by 8 publications

(11 citation statements)

References 16 publications

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“…The Young’s modulus of the composite resin used is 14 GPa, which is similar to that of dentine (18 GPa) and less than that of porcelain (70 GPa) or Ni–Cr alloy (204 GPa) [33]. It was also shown that a less rigid restoration could relax the applied stress by means of greater elastic deformation [34]. The less rigid composite resin shows that a greater elastic deformation would result in a lower deformation of the cusps [34].…”

Section: Discussionmentioning

confidence: 99%

“…It was also shown that a less rigid restoration could relax the applied stress by means of greater elastic deformation [34]. The less rigid composite resin shows that a greater elastic deformation would result in a lower deformation of the cusps [34]. Therefore, the risk of tooth fracture associated with large cavity preparations could be reduced by the overlaying of the vulnerable cusps with proper restorative materials [35].…”

Section: Discussionmentioning

confidence: 99%

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Influence of the indirect restoration design on the fracture resistance: a finite element study

Mei

Chen

et al. 2016

BioMed Eng OnLine

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Objectives To establish a three-dimensional (3D) finite element (FE) model of a maxillary first premolar and to evaluate the stress generated on the tooth (dentine) and on the indirect composite resin restorations by occlusal forces.Methods An embedded intact maxillary first premolar tooth was sliced serially and scanned digitally parallel to the occlusal surface. The 64 images were assembled in a 3D FE mesh and exported to generate a 3D solid tooth model. Simulated, adhesively cemented indirect mesial-occlusal-distal (MOD) inlays of 2 mm (I1), 3 mm (I2) and 4 mm (I3) in width, and MOD onlays with occlusal cusp coverage of 2 mm (O1) and 3 mm (O2) in depth were created. The peak von Mises stress values in the five tooth models resulting from static vertical and oblique occlusal forces (300 N) were evaluated using Patran FE software.ResultsThe peak stress values generated by vertical occlusal force generated in dentine of I1, I2, I3, O1 and O2 restoration were 67, 32, 29, 38 and 27 MPa, respectively, and those generated by oblique occlusal force were 52, 114, 168, 54 and 55 MPa, respectively. The peak von Mises stress values in I1, I2, I3, O1 and O2 restoration subjected to oblique occlusal loading were 79, 120, 1740, 1400 and 1170 MPa, respectively.ConclusionA 3D FE model of a maxillary first premolar was established. Simulated cemented composite resin onlay markedly reduces occlusal stress in the underlying dentine of large MOD preparation. Oblique occlusal force imparts substantially higher stress to large composite resin inlay than to the adjacent dentine.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Influence of the indirect restoration design on the fracture resistance: a finite element study

Mei

Chen

et al. 2016

BioMed Eng OnLine

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“…While others agreed that maximum clinically acceptable MG should be between 100 and 150 μm with CAD/CAM ceramic blocks fabricated. [32][33][34] The mean value of the MG of ceramic restorations was 56.1 μm in vivo studies. 35 Additionally, McLean and von Fraunhofer 31 examined the MG of 1000 fixed restorations over a 5-year period and indicated that the MG <80 μm was difficult to detect under clinical conditions.…”

Section: Discussionmentioning

confidence: 89%

Evaluation of marginal gap of lithium disilicate glass ceramic crowns with optical coherence tomography

Liu

Zhang

2018

J. Biomed. Opt.

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Marginal gap (MG) was the most important factor to evaluate the success of crowns. The study was to assess the MG of lithium disilicate glass ceramic crowns with spectral domain optical coherence tomography (OCT) and stereomicroscopy in vitro, and to provide evidence to measure the MG with OCT. Consistency was observed between OCT and stereomicroscopy to measure the MG after cementation. There was no significant difference between the MG of lithium disilicate glass ceramic crowns using OCT and stereomicroscopy (OCT 59.55 ± 7.22 μm, stereomicroscope 59.48 ± 6.53 μm, P = 0.736) after cementation. OCT was a noninvasive diagnostic technique to measure the MG of lithium disilicate glass ceramic crowns.

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“…According to Geng et al 22) , Weinstein et al 23) introduced FEA into implantology in 1976. Subsequently, linear FEA was also successfully applied in the fields of prosthetic [24][25][26] , restorative [27][28][29] , endodontic 30,31) , and orthodontic 32,33) dentistry.…”

Section: Discussionmentioning

confidence: 99%

Finite element simulation of fixed dental prostheses made from PMMA —Part II: Material modeling and nonlinear finite element analysis

et al. 2021

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Material characteristics can change significantly with increasing chewing velocity. As these in-vitro examinations are very timeconsuming and cost-intensive, the application of finite element analysis (FEA) offers a suitable alternative for predicting the material behavior of complex specimen geometries under clinically relevant loads. Although FEA is applied within numerous dental investigations, there are only few studies available in which a nonlinear FEA is validated with real experiments. Therefore, the aim of the present study was to predict the mechanical behavior of a clinically close three-unit temporary bridge composed of polymethyl methacrylate (PMMA) in the left upper jaw with nonlinear FEA and to verify the prediction through validation experiments. In conclusion, simplifying assumptions of linear elastic material properties for polymeric materials should be avoided in FEA studies, because rate dependencies, stress relaxation and plastic flow are not considered. Additionally, precise preliminary investigations for material characterization are necessary.

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Comparison of Stresses Generated within the Supporting Structures of Mandibular Second Molars Restored with Different Crown Materials: 3‐D Finite Element Analysis (FEA)

Abstract: Considering the stresses generated within the supporting structures, the present work validates, by calculation, the proposed clinical use of either a full ceramic crown or a PFM crown as a restoration for mandibular second molars.

Cited by 8 publications

References 16 publications

Influence of the indirect restoration design on the fracture resistance: a finite element study

Influence of the indirect restoration design on the fracture resistance: a finite element study

Evaluation of marginal gap of lithium disilicate glass ceramic crowns with optical coherence tomography

Finite element simulation of fixed dental prostheses made from PMMA —Part II: Material modeling and nonlinear finite element analysis

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