Finite element analysis of stresses in molars during clenching and mastication

Dejak, Beata; Młotkowski, Andrzej; Romanowicz, M

doi:10.1016/j.prosdent.2003.08.009

Cited by 123 publications

(93 citation statements)

References 33 publications

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“…Although axial forces of approximately 850N 14) seem to be the maximum central biting ability, forces during function are lower, because these forces are nonaxial 15) . Nonaxial loads, especially, however, result in stress in the cervical area along the outer root surface along the cement-enamel junction 16) . Because the change from artificial crown to tooth is in this region, it is the weak point of the tooth-crown complex.…”

Section: Discussionmentioning

confidence: 99%

Failure load of teeth restored by use of alumina copings: Influence of residual tooth structure and cementation

et al. 2013

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To evaluate failure loads of teeth restored by use of alumina-coping, and to assess the effects of different amounts of residual tooth structure and different cements, standardized artificial alumina copings were fabricated on seventy-two molars. 24 of the copings were cemented by use of an adhesive resin cement (P-group), n=24 by use of glass-ionomer cement (K-group), and n=24 by use of a self-adhesive modified composite resin-cement (R-group). After artificial ageing (10,000 thermal-cycles between 6.5 and 60°C; 1,200,000 chewing cycles with F max =64 N), the specimens were loaded until failure (cross-head-speed: 0.5 mm/min). In the K-group 83% of the specimens failed during chewing simulation. Statistical analysis included chi-squared-test, unpaired-to-sample-t-test, and ANOVA. For severely damaged teeth, loads to failure in the P-group (384 N) were significantly (p=0.03) higher than in the R-group (295 N). For severely damaged teeth, use of composite resin cement resulted in higher loads to failure than use of other cements.

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Section: Discussionmentioning

confidence: 99%

Failure load of teeth restored by use of alumina copings: Influence of residual tooth structure and cementation

et al. 2013

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“…20,[40][41][42][43][44]46) Post cement/Self cure resin cement Software Corporation, Santa Ana, CA, USA). The study was undertaken with a model of a maxillary premolar restored using the ParaPost Fiber White and the ParaPost Stainless Steel, and with the definitive crown added.…”

Section: Finite Element Modelmentioning

confidence: 99%

Premolars restored with posts of different materials: fatigue analysis

et al. 2011

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Previous works studied the effect of the material and the dimensions of the post on the biomechanical performance (fracture strength and stress distribution) of restored teeth, under static loads. The aim of this work was to study the effect of the post material (glass fibre and stainless steel) on restored teeth, which have the final crown, under dynamic conditions. The use of a biomechanical model, including a fatigue analysis from FEA, is presented as a powerful method to study the effect of the material of the intraradicular post. The inclusion of the fatigue analysis allows for a more realistic study that takes into account the dynamic nature of masticatory forces. At the same time, the results obtained are easier to interpret by both dentists and mechanical engineers. No differences were found, with the load and number of cycles considered, between glass fibre and stainless steel as material for the intraradicular post used in premolars restorations.

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“…Several works in the literature have modelled the natural tooth (Dejak et al, 2003;Middleton et al, 1996;Zarone et al, 2006). Most of modelled natural teeth included enamel, dentine, cortical and cancellous bone, pulp and ligament (Middleton et al, 1996;Rees & Jacobsen, 1997).…”

Section: Components In the Modelmentioning

confidence: 99%