Biomechanical Stress Analysis of Mandibular
First Permanent Molar; Restored with Amalgam
and Composite Resin: A Computerized Finite
Element Study

Musani, Iqbal; Prabhakar, A R

doi:10.5005/jp-journals-10005-1047

Cited by 13 publications

(9 citation statements)

References 5 publications

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“…The mechanical system in posterior teeth resists fracture during mastication and facilitates more uniform stress distributions [33] since high modulus enamel (E = 80 GPa), is combined with more compliant dentin (E = 18 GPa). The mechanical behavior of premolars and molars, adhesively restored using different resin-based composites, has been investigated under occlusal loading either under laboratory conditions [9,12,33,34] or by means of finite element analysis of restored teeth [11,[13][14][15][16][17][18][19][20][21][22]26].…”

Section: Discussionmentioning

confidence: 99%

“…So, the primary origin of stress in a restored tooth usually comes by dimensional changes of the composite at the interface of tooth and restorative material or by occlusal loads [8]. These phenomena have been investigated both by laboratory experiments [9][10][11][12] and by finite element analysis [13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Adhesive class I restorations in sound molar teeth incorporating combined resin-composite and glass ionomer materials: CAD-FE modeling and analysis

et al. 2019

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Objectives: To investigate the influence of different resin composite and glass ionomer cement material combinations in a "bi-layer" versus a "single-layer" adhesive technique for class I cavity restorations in molars using numerical finite element analysis (FEA). Materials and Methods: Three virtual restored lower molar models with class I cavities 4 mm deep were created from a sound molar CAD model. A combination of an adhesive and flowable composite with bulk fill composite (model A), of a glass ionomer cement with bulk fill composite (model B) and of an adhesive with bulk fill composite (model C), were considered. Starting from CAD models, 3D-finite element (FE) models were created and analyzed. Solid food was modeled on the occlusal surface and slide-type contact elements were used between tooth surface and food. Polymerization shrinkage was simulated for the composite materials. Physiological masticatory loads were applied to these systems combined with shrinkage. Static linear analyses were carried out. The maximum normal stress criterion was adopted as a measure of potential damage. Results: All models exhibited high stresses principally located along the tooth tissues-restoration interfaces. All models showed a similar stress trend along enamel-restoration interface, where stresses up to 22 MPa and 19 MPa was recorded in the enamel and restoration, respectively. A and C models showed a similar stress trend along the dentin-restoration interface with a lower stress level in model A, where stresses up to 11.5 MPa and 7.5 MPa were recorded in the dentin and restoration, respectively, whereas stresses of 17 MPa and 9 MPa were detected for model C. In contrast to A and C models, the model B showed a reduced stress level in dentin, in the lower restoration layer and no stress on the cavity floor. Significance. FE analysis supported the positive effect of a "bi-layer" restorative technique in a 4 mm deep class I cavities in lower molars versus "single-layer" bulk fill composite technique.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adhesive class I restorations in sound molar teeth incorporating combined resin-composite and glass ionomer materials: CAD-FE modeling and analysis

et al. 2019

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“…It was found that the amount of stress between amalgam and resin composite restoration had a little difference in the magnitude of Pmax stress values. In another study, Musani and Prabhakar [ 1 ] investigated the stress distributions of resin composite and amalgam restorations for class I cavity in the mandibular first molar tooth and reported that the stress value magnitude seen on the cervical third of the crown in amalgam restoration was lower than that of resin composite. Different from the reported investigations, in this study, the differences were observed between von Mises and Pmax values on enamel and Pmax value only on dentin.…”

Section: Discussionmentioning

confidence: 99%

“…Functional and parafunctional forces in the mouth can cause stress on the sound teeth, on supporting bone, on soft tissues, and on adhesively restored teeth after dental therapy [ 1 ]. Determining the distribution and analysis of these stresses are of fundamental importance in the extensive research, and they can consistently contribute to reduce the risk of dental restoration failure [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

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

Alp

Alagoz

Ulusoy

2020

BioMed Research International

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The aim of this study is to investigate the stress distributions of different restoration options for class II mesio-occluso-distal (MOD) cavities. A class II MOD cavity with proximal box gingival floor 1 mm below cementoenamel junction was designed in a mandibular first molar tooth model. 3D finite-element analysis (FEA) and 3D-CAD modelling were used to examine the occlusal stresses distributed to the remaining buccal enamel (RBE), remaining lingual enamel (RLE), adhesive surfaces, and restorative materials by direct and indirect materials resulting from a 600 N of static occlusal load stimulating foodstuff. von Mises (VM) and maximum principal (Pmax) stresses were evaluated for two CAD/CAM materials and three direct materials. CAD/CAM materials exerted less stress than the direct restorative materials. Significant von Mises and Pmax stress value differences were seen among all restoration models on RBE. Reducing RLE and including it into the cavity would be a more effective option for this model in this scenario. As VM and Pmax stresses of PIHC CAD/CAM material for RBE and dentin were significantly lower than other tested materials, it may be the choice of material for indirect MOD restorations.

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“…The consequence of such stress concentration can lead to microleakage and fracture of the tooth and or restoration. [ 4 ]…”

Section: Introductionmentioning

confidence: 99%

Influence of “MOTRCS” factors on the performance of various direct and indirect restorations: A finite element analysis

Reddy¹,

Malini

Ballullaya

et al. 2021

J Conserv Dent

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Aim of the Study: The purpose of the study is to evaluate the occlusal relationship of the mesiobuccal cusp of a mandibular first molar with the marginal ridge of maxillary first molar and second premolar and to analyze the effect of the above occlusal relation on different direct and indirect restorations using finite element analysis (FEA). Methodology: Four hundred volunteers studying in a dental college were screened, of which 100 volunteers were selected for studying occlusal relationships based on the inclusion and exclusion criteria. The two most common occlusal relationships were considered for analyzing two direct (amalgam and direct composite restorations) and two indirect restorations (composite and ceramic restorations). Three-dimensional (3D) scanning of the models was performed, and Class II tooth preparations specific for each restorative material were prepared digitally on 3D models. FEA was employed to study von Mises (VM) stress, principal stresses, and cuspal deflection for each restorative material, and failure of the tooth-restoration unit was calculated using the modified Mohr failure criterion. Results: Among all the analyzed materials, cuspal deformation, principal stresses, and VM stresses were high for direct composite restoration and least for ceramic inlay. According to modified Mohr criteria, except for direct composite, all other materials performed better. Conclusion: Silver amalgam and ceramic restorations presented with minimal stress concentration and cuspal deflection, and Type I occlusal relationship presented with higher stress concentration compared to Type II.

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Biomechanical Stress Analysis of Mandibular First Permanent Molar; Restored with Amalgam and Composite Resin: A Computerized Finite Element Study

Cited by 13 publications

References 5 publications

Adhesive class I restorations in sound molar teeth incorporating combined resin-composite and glass ionomer materials: CAD-FE modeling and analysis

Adhesive class I restorations in sound molar teeth incorporating combined resin-composite and glass ionomer materials: CAD-FE modeling and analysis

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

Influence of “MOTRCS” factors on the performance of various direct and indirect restorations: A finite element analysis

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