Finite element analysis of fixed partial denture replacement

Romeed, Shihab; Fok, S L; Wilson, Nairn

doi:10.1111/j.1365-2842.2004.01354.x

Cited by 26 publications

(28 citation statements)

References 18 publications

(15 reference statements)

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“…Stress concentration usually exists in the connector of the CFPD, which is consistent with the findings of most scholars (Wang et al, 1998;Romeed et al, 2004). So it is advisable for clinicians to pay attention to the design of the connector of the abutment near to the pontic.…”

Section: Discussionsupporting

confidence: 77%

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

Peng

Chen

Wang

et al. 2013

J. Zhejiang Univ. Sci. B

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Abstract:Objective: This study investigated the effect of proximal contact strength on the three-dimensional displacements of cantilever fixed partial denture (CFPD) under vertically concentrated loading with digital laser speckle (DLS) technique. Methods: Fresh mandible of beagle dog was used to establish the implant-supported CFPD for specimen. DLS technique was employed for measuring the three-dimensional displacement of the prosthesis under vertically concentrated loading ranging from 200 to 3 000 g. The effect of the contact tightness on the displacement of CFPD was investigated by means of changing the contact tightness. Results: When an axial concentrated loading was exerted on the pontic of the implant-supported CFPD, the displacement of the CFPD was the greatest. The displacement of the prosthesis decreased with the increase of contact strength. When the contact strength was 0, 0.95, and 3.25 N, the displacement of the buccolingual direction was smaller than that of the mesiodistal direction but greater than that of the occlusogingival direction. When the force on the contact area was 6.50 N, the mesiodistal displacement of the prosthesis was the biggest while the buccolingual displacement was the smallest. Conclusions: The implantsupported CFPD is an effective therapy for fully or partially edentulous patients. The restoration of the contact area and the selection of the appropriate contact strength can reduce the displacement of the CFPD, and get a better stress distribution. The most appropriate force value is 3.25 N in this study.

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Section: Discussionsupporting

confidence: 77%

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

Peng

Chen

Wang

et al. 2013

J. Zhejiang Univ. Sci. B

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“…Romeed et al. (17) stated that it is necessary to ensure that the greatest value of principal stress in all materials be less than the relevant critical value to rule out any possibility of material failure. Kamposiora et al.…”

Section: Discussionmentioning

confidence: 99%

“…Notwithstanding the sophistication of the FEA analyses, Romeed et al. (17) believe that the analyses suffer some limitations: materials are assumed to be isotropic, homogeneous, and linear elastic, despite the anisotropic nature of some structures and the presence of voids or cracks. Although the FE analyses allow the introduction of these parameters, the correct information about them for all tooth parts and all dental materials is not available.…”

Section: Discussionmentioning

confidence: 99%

The Influence of the Loading Mode on the Stress Distribution on the Connector Region of Metal‐ceramic and All‐ceramic Fixed Partial Denture

et al. 2008

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Studies pertaining to the mechanical behavior of fixed partial dentures (FPDs) frequently found the highest tensile stress values at the connector region when load is applied at the pontic central region. The connector region is considered the weakest point of the prosthesis with the greatest potential of fractures, regardless of the material used. This 2D finite element study compared the stress distribution on three-element all-ceramic and metal-ceramic FPDs with different loading conditions. Three FPD models were designed: (i) metal-ceramic FPD; (ii) all-ceramic FPD with the veneering porcelain only on the occlusal face; and (iii) all-ceramic FPD with the veneering porcelain on the occlusal and cervical face of the pontic. Loads of 100 N were applied following these simulations: (i) distributed on all working cusps; (ii) only on the abutment teeth; and (iii) only on the pontic. There is a significant change on the stress distribution and on the tensile stress values when the load configuration is changed. The stress distribution from the load applied on the abutments was significantly better compared with the other two load simulations. When the loads were applied on the pontic and distributed on all working cusps, the highest tensile stress values appeared on the cervical region of the connectors between the abutments and the pontic. However, when the load was applied on the abutment teeth, the maximum tensile stress value significantly decreased and was located on the occlusal region of the connectors. In fact, the load applied on the pontic region does not simulate the clinical situation. Studies using this load configuration have overestimated the connector regions as having the highest probability of failures.

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“…But if the K t is appreciable, the maximum stress is substantially larger than σ nom and the estimated d min required to achieve 20 years of clinical function is insufficient. Of note, several 2D and 3D finite element studies have identified that "high" stress concentrations develop at the connector area [4,5,[8][9][10][11][12][13]]. Yet, no study has provided a quantitative description of the magnitude of K t in terms of the bridge geometry.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Fatigue of zirconia and dental bridge geometry: Design implications

2011

The Journal of Prosthetic Dentistry

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Zirconia is currently used as a framework material for posterior all-ceramic bridges. While the majority of research efforts have focused on the microstructure and corresponding mechanical properties of this material, clinical fractures appear to be largely associated with the appliance geometry.Objective-The objective of this study was to estimate the maximum stress concentration posed by the connector geometry and to provide adjusted estimates of the minimum connector diameter that is required for achieving 20 years of function.Methods-A simple quantitative description of the connector geometry in an all-ceramic 4-unit bridge design is used with published stress concentration factor charts to quantify the degree of stress concentration.Results-The magnitude of stress concentration estimated for clinically relevant connector geometries ranges from 2 to 3. Using previously published recommendations for connector designs, adjusted estimates for the minimum connector diameter required to achieve 20 years of clinical function are presented.Significance-To prevent clinical fractures the minimum connector diameter in multi-unit bridges designs must account for the loads incurred during function and the extent of stress concentration posed by the connector geometry.

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Finite element analysis of fixed partial denture replacement

Cited by 26 publications

References 18 publications

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

The Influence of the Loading Mode on the Stress Distribution on the Connector Region of Metal‐ceramic and All‐ceramic Fixed Partial Denture

Fatigue of zirconia and dental bridge geometry: Design implications

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