3D FEA of high-performance polyethylene fiber reinforced maxillary dentures

Cheng, Yi; Li, J.Y.; Fok, S L; Cheung, William K.; Chow, Tak W

doi:10.1016/j.dental.2010.05.002

Cited by 31 publications

(36 citation statements)

References 47 publications

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“…Similarly, in this study, for all the impact scenarios S1 -S5, the path from frenulum to anterior palatal area is seen to be prone to high stress values that are oscillatory in character. Results of recent experimental (such as those of Vlissidis 2006, 2009) and finite element studies (such as Ates et al 2006;Cheng, Li, et al 2010) of the denture structure coincide with this point, and it can be stated that reasons causing fracture over this path may not only be related to daily-use forces as greatly discussed in the literature. Moreover, one of the most common undesired but unavoidable loading conditions on the (maxillary) complete dentures are impact loadings, such as accidental drops on a rigid surface from some height.…”

Section: Discussionmentioning

confidence: 63%

“…Studies using strain gages or FEM have concentrated on the stress distribution of the maxillary complete dentures under quasi-static loading conditions. They express results of simulating expected biting forces (such as Vlissidis 2006, 2009 for strain gages and Darbar et al 1996;Ates et al 2006;Cheng, Li, et al 2010 for FEM and references therein) by either using twodimensional (2D) or 3D models of dentures. 2D FEM has been shown to be effective for the treatment of problems of plane stress, and plane strain, but 2D FEM primarily provides information concerning the plane of interest or local variation of a parameter, disregarding the full picture of stress distribution (Ates et al 2006), unlike 3D FEM analysis despite its requirements for much more dense mesh generation.…”

Section: Discussionmentioning

confidence: 99%

“…Mechanical properties of various dental acrylic types under controlled laboratory conditions are widely available (Phunthikaphadr et al 2009;Cheng, Li, et al 2010) stating that various properties should exist for a good-quality one without their relevance to the real-life loading conditions and geometrical models being inves- tigated in detail. However, the stress -strain relationship of PMMA, either intact or rubber-toughened, is highly rate and temperature dependent in terms of yield stress and plastic flow behavior.…”

Section: Discussionmentioning

confidence: 99%

“…One of the most common problems in this field of prosthetic dentistry is the fracture of acrylic complete dentures (Khasawneh and Arab 2003;Vlissidis 2006, 2009;); Cheng, Li, et al 2010. It is well known that an edentulous patient can only exert occlusal forces at a level of 15 -25% of dentate patients and an acrylic complete denture bears tensile stress values about 48-62 MPa, and compressive stress values about 75 MPa considering local stress concentrations (Ates et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Many methods of experimental stress analysis, such as brittle coating, photoelastic models, strain gauges, have been used to examine the stress distribution in complete maxillary dentures as in Vlissidis (2006, 2009), as well as numerical models applying finite element methods (FEM; Beyli and von Fraunhofer 1981;Darbar et al 1996;Hengyi et al 2004;Ates et al 2006;Prombonas and Vlissidis 2009;Cheng, Li, et al 2010). All these studies show that the stress concentrates in the anterior palatal areas of maxillary dentures.…”

Section: Introductionmentioning

confidence: 99%

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Stress analysis of a complete maxillary denture under various drop impact conditions: a 3D finite element study

Sünbüloğlu

2014

Computer Methods in Biomechanics and Biomedical Engineering

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Complete maxillary dentures are one of the most economic and easy ways of treatment for edentulous patients and are still widely used. However, their survival rate is slightly above three years. It is presumed that the failure reasons are not only due to normal fatigue but also emerge from damage based on unavoidable improper usage. Failure types other than long-term fatigue, such as over-deforming, also influence the effective life span of dentures. A hypothesis is presumed, stating that the premature/unexpected failures may be initiated by impact on dentures, which can be related to dropping them on the ground or other effects such as biting crispy food. Thus, the behavior of a complete maxillary denture under impact loading due to drop on a rigid surface was investigated using the finite element method utilizing explicit time integration and a rate-sensitive elastoplastic material model of polymethylmethacrylate (PMMA). Local permanent deformations have been observed along with an emphasis on frenulum region of the denture, regardless of the point of impact. Contact stresses at the tooth-denture base were also investigated. The spread of energy within the structure via wave propagation is seen to play a critical role in this fact. Stress-wave propagation is also seen to be an important factor that decreases the denture's fatigue life.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Stress analysis of a complete maxillary denture under various drop impact conditions: a 3D finite element study

Sünbüloğlu

2014

Computer Methods in Biomechanics and Biomedical Engineering

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Brief communication: Comparing loading scenarios in lower first molar supporting bone structure using 3D finite element analysis

Benazzi¹,

Kullmer²,

Grosse³

et al. 2011

American J Phys Anthropol

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Finite element analysis (FEA) is a widespread technique to evaluate the stress/strain distributions in teeth or dental supporting tissues. However, in most studies occlusal forces are usually simplified using a single vector (i.e., point load) either parallel to the long tooth axis or oblique to this axis. In this pilot study we show how lower first molar occlusal information can be used to investigate the stress distribution with 3D FEA in the supporting bone structure. The LM(1) and the LP(2) -LM(1) of a dried modern human skull were scanned by μCT in maximum intercuspation contact. A kinematic analysis of the surface contacts between LM(1) and LP(2) -LM(1) during the power stroke was carried out in the occlusal fingerprint analyzer (OFA) software to visualize contact areas during maximum intercuspation contact. This information was used for setting the occlusal molar loading to evaluate the stress distribution in the supporting bone structure using FEA. The output was compared to that obtained when a point force parallel to the long axis of the tooth was loaded in the occlusal basin. For the point load case, our results indicate that the buccal and lingual cortical plates do not experience notable stresses. However, when the occlusal contact areas are considered, the disto-lingual superior third of the mandible experiences high tensile stresses, while the medio-lingual cortical bone is subjected to high compressive stresses. Developing a more realistic loading scenario leads to better models to understand the relationship between masticatory function and mandibular shape and structures. Am J Phys Anthropol, 2012. © 2011 Wiley Periodicals, Inc.

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