An investigation into the importance of the periodontal ligament and alveolar bone as supporting structures in finite element studies

Rees, Jeremy

doi:10.1046/j.1365-2842.2001.00686.x

Cited by 98 publications

(86 citation statements)

References 30 publications

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“…Contrary to our results, Rees et al 4,14,[33][34][35] proposed that the sampling horizontal planes were chosen at 1.1 ㎜ above the CEJ among the buccal cervical region because an initial pilot study showed this to be the position of maximum stress concentration. Despite their findings, the results of their study must be interpreted with a certain amount of caution.…”

Section: ⅳ Discussioncontrasting

confidence: 84%

Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

Lee

Hur

Kim

et al. 2006

J Korean Acad Conserv Dent

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The objective of this study was to investigate the effects of various occlusal loads on the stress distribution of the buccal cervical region of a normal maxillary second premolar, using a three dimensional finite element analysis (3D FEA).After 3D FE modeling of maxillary second premolar, a static load of 500N of three load cases was applied. Stress analysis was performed using ANSYS (Swanson Analysis Systems, Inc., Houston, USA). The maximum principal stresses and minimum principal stresses were sampled at thirteen nodal points in the buccal cervical enamel for each four horizontal planes, 1.0 ㎜ above CEJ, 0.5 ㎜ above CEJ, CEJ, 0.5 ㎜ under CEJ.The results were as follows 1. The peak stress was seen at the cervical enamel surface of the mesiobuccal line angle area, asymmetrically. 2. The values of compressive stresses were within the range of the failure stress of enamel. But the values of tensile stresses exceeded the range of the failure stress of enamel. 3. The tensile stresses from the perpendicular load at the buccal incline of palatal cusp may be shown to be the primary etiological factors of the NCCLs. [J Kor Acad Cons Dent 31(6):427-436, 2006]

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Section: ⅳ Discussioncontrasting

confidence: 84%

Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

Lee

Hur

Kim

et al. 2006

J Korean Acad Conserv Dent

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“…All FE models contained a periodontal ligament and cortical and medullar bone, since it has been suggested that the periodontal ligament and alveolar bone should be considered in the FEA of teeth. 36 The load was applied in two areas to try and simulate the clinical force of mastication. 37 The placement of an endodontic post creates an unnaturally restored structure, since the root canal space is filled with a material that is unlike pulp with regard to stiffness.…”

Section: Discussionmentioning

confidence: 99%

Influence of Post and Resin Cement on Stress Distribution of Maxillary Central Incisors Restored with Direct Resin Composite

Spazzin¹,

Galafassi²,

Meira-Júnior³

et al. 2009

Operative Dentistry

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According to finite element analysis, the zirconia ceramic post created higher stress levels in the post and slightly less in dentin compared with glass fiber posts. Resin cement with a high elastic modulus created higher stress levels in the cement layer. The different film thicknesses of cement did not create significant changes in stress levels. SUMMARYThe current study evaluated the influence of two endodontic post systems and the elastic modulus and film thickness of resin cement on stress distribution in a maxillary central incisor (MCI) restored with direct resin composite using finite element analysis (FEA). A three-dimensional model of an MCI with a coronary fracture and supporting structures was performed. A static chewing pressure of 2.16 N/mm 2 was applied to two areas on the palatal surface of the composite restoration. Zirconia ceramic (ZC) and glass fiber (GF) posts were considered. The stress distribution was analyzed in the post, dentin and cement layer when ZC and GF posts were fixed to the root canals using resin cements of different elastic moduli (7.0 and 18.6 GPa) and different layer thicknesses (70 and 200 µm). The different post materials presented a significant influence on stress distribution with lesser stress concentration when using the GF post. The higher elastic modulus cement created higher stress levels within itself. The cement thicknesses did not present significant changes.

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“…The extent of stress of a cervical lesion, as shown by one study 7) , is directly related to the area of the periodontal ligament and the amount of tooth mobility under loading. Another study also showed that the lesions were increased as the loads on the tooth moved further away from the long axis 8) .…”

Section: ⅰ Introductionmentioning

confidence: 96%

“…Three dimensional (3D) finite element (FE) stress analysis is a particularly useful method for examining the stress distribution in teeth because it can cope with the complex geometric shape of a tooth and the large variations in the physical properties of the materials which make up a tooth and its supporting structures 7) . The purpose of this study was to investigate the influence of composite resins with different elastic modulus, cavity modification and occlusal loading condition on the stress distribution of the restored notch-shaped NCCL using 3D FE analysis.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Stress distribution of Class V composite resin restorations: A three-dimensional finite element study

Park

Hur

Kim

2008

J Korean Acad Conserv Dent

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This study was to investigate the influence of composite resins with different elastic modulus, cavity modification and occlusal loading condition on the stress distribution of restored notch-shaped noncarious cervical lesion using 3-dimensional (3D) finite element (FE) analysis.The extracted maxillary second premolar was scanned serially with Micro-CT. The 3D images were processed by 3D-DOCTOR. ANSYS was used to mesh and analyze 3D FE model. A notch-shaped cavity and a modified cavity with a rounded apex were modeled. Unmodified and modified cavities were filled with hybrid or flowable resin. After restoration, a static load of 500N was applied in a point-load condition at buccal cusp and palatal cusp. The stress data were analyzed using analysis of principal stress.The results were as follows: 1. In the unrestored cavity, the stresses were highly concentrated at mesial CEJ and lesion apex and the peak stress was observed at the mesial point angle under both loading conditions. 2. After restoration of the cavity, stresses were significantly reduced at the lesion apex, however cervical cavosurface margin, stresses were more increased than before restoration under both loading conditions. 3. When restoring the notch-shaped lesion, material with high elastic modulus worked well at the lesion apex and material with low elastic modulus worked well at the cervical cavosurface margin. 4. Cavity modification the rounding apex did not reduce compressive stress, but tensile stress was reduced. [J Kor Acad Cons Dent 33(1):28-38, 2008] Key words : Cervical lesion, class V lesion, composite resin, finite element analysis, stress distribution

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An investigation into the importance of the periodontal ligament and alveolar bone as supporting structures in finite element studies

Cited by 98 publications

References 30 publications

Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

Influence of Post and Resin Cement on Stress Distribution of Maxillary Central Incisors Restored with Direct Resin Composite

Stress distribution of Class V composite resin restorations: A three-dimensional finite element study

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