Tensile strength and modulus of elasticity of tooth structure and several restorative materials

Bowen, R.L.; Rodríguez, Mario Suárez

doi:10.14219/jada.archive.1962.0090

Cited by 213 publications

(81 citation statements)

References 2 publications

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“…The static elastic modulus of Vitrebond was 1.1 GPa (Tam, McComb & Pulver, 1991). Dentin has an elastic modulus in the range of 11-19.3 GPa (Renson & Braden, 1975;Bowen & Rodriguez, 1962;Sano & others, 1994;Lehman, 1967;Xu & others, 1998), which is similar to F2000. This might explain why the restorations supported by dentin and F2000 behaved similarly.…”

Section: Discussionmentioning

confidence: 85%

The Effect of Base Materials with Different Elastic Moduli on the Fracture Loads of Machinable Ceramic Inlays

Banditmahakun

Kuphasuk

Kanchanavasita

et al. 2006

Operative Dentistry

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SUMMARYThis study investigated the effect of two base materials with different elastic moduli (F2000 and Vitrebond) on the fracture load of machinable ceramic inlays. Standardized MOD cavities were prepared in 18 human maxillary first or second premolars. The teeth were randomly assigned to three groups of six premolars each; Group 1 (control: no base); Group 2 (base with a polyacid-modified resin composite: F2000); Group 3 (base with a resin-modified glassionomer cement: Vitrebond). The inlays were fabricated from Vitablocs Mark II using a Cerec II machine. After the inlays were cemented with Tetric Ceram and the Syntac adhesive system, using the Ultrasonic Insertion Technique (USI), they were stored in distilled water at 37°C for 24 hours prior to fracture testing in a universal testing machine using a crosshead speed of 0.5 mm/minute. The static transverse elastic moduli of base materials were measured using a threepoint bending test. The mean fracture loads and standard deviations of the Cerec inlays in Groups 1, 2 and 3 were 1.15 ± 0.39 KN, 1.13 ± 0.36 KN and 0.58 ± 0.11 KN, respectively. Statistical analysis showed that the mean fracture load of Group 3 was significantly lower than that of Groups 1 and 2 (p<.05). There was no significant difference in fracture load between Groups 1 and 2. The means and standard deviations of the elastic moduli of F2000 and Vitrebond were 15.63 ± 0.32 and 2.16 ± 0.55 GPa, respectively. The results indicated that the fracture load increased significantly as the elastic modulus of a base material increased.

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Section: Discussionmentioning

confidence: 85%

The Effect of Base Materials with Different Elastic Moduli on the Fracture Loads of Machinable Ceramic Inlays

Banditmahakun

Kuphasuk

Kanchanavasita

et al. 2006

Operative Dentistry

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“…As the tensile strengths of enamel and dentin are much lower than their respective compressive strengths 31,32) , tensile stress is much more destructive than compressive stress. In terms of restoration retention in dentin bonding agent trials, tensile stresses appear to be the most destructive, at least short-term.…”

Section: ⅳ Discussionmentioning

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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“…Several studies have shown that enamel and dentin are less resistant to tensile stress than compressive stress [36][37][38][39] . In compressive stress, enamel can withstand forces up to 35 times greater than when subjected to tensile stress; meanwhile, dentin can resist compressive forces at least seven times greater than the amount of tensile stress that will cause it to fail 37,38) .…”

Section: ⅳ Discussionmentioning

confidence: 99%

“…In compressive stress, enamel can withstand forces up to 35 times greater than when subjected to tensile stress; meanwhile, dentin can resist compressive forces at least seven times greater than the amount of tensile stress that will cause it to fail 37,38) . The tensile strengths of enamel and dentin are much lower than are their respective compressive strengths 38,39) . According to the experiment, tensile stress affected the result to the meaningful level while the effect of compressive stress was not.…”

Section: ⅳ Discussionmentioning

confidence: 99%

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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Tensile strength and modulus of elasticity of tooth structure and several restorative materials

Cited by 213 publications

References 2 publications

The Effect of Base Materials with Different Elastic Moduli on the Fracture Loads of Machinable Ceramic Inlays

The Effect of Base Materials with Different Elastic Moduli on the Fracture Loads of Machinable Ceramic Inlays

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

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

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