Finite element analysis of the possible mechanism of cervical lesion formation by occlusal force

Tanaka, Mariko; Naito, Toru; Yokota, Makoto; Kohno, Masaki

doi:10.1046/j.1365-2842.2003.00959.x

Cited by 78 publications

(90 citation statements)

References 11 publications

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“…This results are similar with Tanaka et al 15) which they reported that when the force was oblique, plastic deformation of the lower first molar appeared at the enamel surface along the cervical region because of the tensile stress. Spears et al 40) showed that a vertical force loaded at one tip of the lingual cusp of the mandibular second premolar produces tensile stress at the lingual enamel on the cervical region.…”

Section: ⅳ Discussionsupporting

confidence: 92%

“…Based upon these data, 170 N was assumed as the chewing force for premolars and 500 N was assumed as the heavy parafunctional load of bruxism and traumatic occlusion. In this study, a tooth model loaded by a point load of static 500 N was considered more representative of high-risk loading situation, in contrast to other FEA studies [11][12][13][14][15][16] . Load-I for buccal eccentric occlusion and Load-II for palatal eccentric occlusion were selected.…”

Section: ⅳ Discussionmentioning

confidence: 99%

“…Many studies 11,13,15,16,[29][30][31] reported that the peak stress was concentrated at the CEJ in their FEA models. Kuroe et al 32) also confirmed by the photoelastic method that a vertical force loaded on the tooth causes stress con- Compressive strength of dentin 249 -347…”

Section: ⅳ Discussionmentioning

confidence: 99%

“…The result of 500 N loaded 45。labioapi-cally to the incisal tip was that the stress profile in the cervical region of central incisor was greater than the canine or premolar. Tanaka et al 15) carried out stress analysis on the upper central incisor and the lower first molar using the plastic-elastic deformation theory with 2D FEA. The result was that oblique loading causes plastic deformation near the CEJ.…”

Section: Effects Of Occlusal Load On the Cervical Stress Distributionmentioning

confidence: 99%

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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 Discussionsupporting

confidence: 92%

Section: ⅳ Discussionmentioning

confidence: 99%

Section: ⅳ Discussionmentioning

confidence: 99%

Section: Effects Of Occlusal Load On the Cervical Stress Distributionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…Borcic et al 20) and Ichim et al 18) also went on an experiment with 200 N of loading. Therefore, stress range of intraoral loading seems to be within the value of 170 -200 N. In this study, a tooth model loaded by a point load of static 200 N was considered more representative of normal chewing load situation, in contrast to other FE analysis studies 23,[33][34][35] . Previous studies [18][19][20] were based on applying load on buccal cusp.…”

Section: ⅳ Discussionmentioning

confidence: 99%

The influence of occlusal loads on stress distribution of cervical composite resin restorations: A three-dimensional finite element study

Park

Hur

Kim

et al. 2008

J Korean Acad Conserv Dent

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The purpose of this study was to investigate the influence of various occlusal loading sites and directions on the stress distribution of the cervical composite resin restorations of maxillary second premolar, using 3 dimensional (3D) finite element (FE) analysis. Extracted maxillary second premolar was scanned serially with Micro-CT (SkyScan1072; SkyScan, Aartselaar, Belgium). The 3D images were processed by 3D-DOC-TOR (Able Software Co., Lexington, MA, USA). HyperMesh (Altair Engineering, Inc., Troy, USA) and ANSYS (Swanson Analysis Systems, Inc., Houston, USA) was used to mesh and analyze 3D FE model. Notch shaped cavity was filled with hybrid (Z100, 3M Dental Products, St. Paul, MN, USA) or flowable resin (Tetric Flow, Vivadent Ets., FL-9494-Schaan, Liechtenstein) and each restoration was simulated with adhesive layer thickness (40 ㎛). A static load of 200 N was applied on the three points of the buccal incline of the palatal cusp and oriented in 20�increments, from vertical (long axis of the tooth) to oblique 40�direction towards the buccal. The maximum principal stresses in the occlusal and cervical cavosurface margin and vertical section of buccal surfaces of notch-shaped class V cavity were analyzed using ANSYS. As the angle of loading direction increased, tensile stress increased. Loading site had little effect on it. Under same loading condition, Tetric Flow showed relatively lower stress than Z100 overall, except both point angles. Loading direction and the elastic modulus of restorative material seem to be important factor on the cervical restoration. [J Kor Acad Cons Dent 33(3):246-257, 2008]

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Relations Between Shape, Materials Properties, and Function in Biological Materials Using Laser Speckle Interferometry: In situ Tooth Deformation

et al. 2006

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The manner in which stiff biological objects, such as whole bones and teeth, deform under load can provide direct insight into their in vivo functions, while highlighting the relations between their structure and materials properties. A new approach for studying the mechanical functions of such objects, using as an example the crowns of human teeth, is developed. Tooth‐crown deformation under a compressive load is determined in water using laser speckle interferometry. The deformation patterns are analyzed using a novel procedure that reveals the relative magnitudes of 3D displacements of the outer surface. Nanometer‐scale deformations of natural teeth were compared to deformations of identical acrylic replicas, in order to differentiate between contributions of the structure–material properties from contributions of morphology. It is shown that human premolars deform in a manner that is largely controlled by shape; in natural teeth, the enamel cap appears to displace mainly as a rigid body, undergoing moderate deformation. These observations contribute to the understanding of whole‐tooth performance under load. The approach for analyzing the deformation of loaded whole objects is directly applicable to the study of many stiff biological specimens, including comparisons between normal and altered (repaired or genetically modified) bones.

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Finite element analysis of the possible mechanism of cervical lesion formation by occlusal force

Cited by 78 publications

References 11 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

The influence of occlusal loads on stress distribution of cervical composite resin restorations: A three-dimensional finite element study

Relations Between Shape, Materials Properties, and Function in Biological Materials Using Laser Speckle Interferometry: In situ Tooth Deformation

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