A cusp supporting framework design can decrease critical stresses in veneered molar crowns

Kirsten, Armin; Parkot, D.; Raith, Stefan; Fischer, Horst

doi:10.1016/j.dental.2013.12.004

Cited by 15 publications

(14 citation statements)

References 26 publications

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“…In the case of veneered or layered prostheses, several methodologies are available to assess the mechanical performance of different materials combinations. Although being far from a clinical relevance, uniaxial or biaxial bending tests [12,13], delamination tests via flexural bending techniques [14], and even structural testing of crowns and bridges [15] are examples of standardized methodologies providing answers to specific and clinically relevant questions about the interface. Several test variables such as thickness ratio [16], loading speed and direction [17] or mismatch between elastic and thermal properties [18] are usually added to this type of experimental setup.…”

Section: Interfacial Strength Testingmentioning

confidence: 99%

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

et al. 2017

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Section: Interfacial Strength Testingmentioning

confidence: 99%

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

et al. 2017

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“…A good control for these experiments would be a metal-ceramic interface of known successful bond strength. Modulus mappings at this small scale could then be utilized for finite element analysis models2833 to simulate the behavior of dental ceramic multilayers giving insight to the potential failure modes in service.…”

Section: Discussionmentioning

confidence: 99%

“…Quantitative data from the resin-dentin interface2327 suggests that nanoindentation is a potentially useful tool for the evaluation of the bond acquired. Nanoindentation derived properties from the interfaces of restorative dental materials can also be utilized in numerical models to aid in the understanding of the load transfer within a restoration 252628…”

Section: Introductionmentioning

confidence: 99%

Interfacial modulus mapping of layered dental ceramics using nanoindentation

et al. 2016

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PURPOSEThe aim of this study was to test the modulus of elasticity (E) across the interfaces of yttria stabilized zirconia (YTZP) / veneer multilayers using nanoindentation.MATERIALS AND METHODSYTZP core material (KaVo-Everest, Germany) specimens were either coated with a liner (IPS e.max ZirLiner, Ivoclar-Vivadent) (Type-1) or left as-sintered (Type-2) and subsequently veneered with a pressable glass-ceramic (IPS e.max ZirPress, Ivoclar-Vivadent). A 5 µm (nominal tip diameter) spherical indenter was used with a UMIS CSIRO 2000 (ASI, Canberra, Australia) nanoindenter system to test E across the exposed and polished interfaces of both specimen types. The multiple point load – partial unload method was used for E determination. All materials used were characterized using Scanning Electron Microscopy (SEM) and X – ray powder diffraction (XRD). E mappings of the areas tested were produced from the nanoindentation data.RESULTSA significantly (P<.05) lower E value between Type-1 and Type-2 specimens at a distance of 40 µm in the veneer material was associated with the liner. XRD and SEM characterization of the zirconia sample showed a fine grained bulk tetragonal phase. IPS e-max ZirPress and IPS e-max ZirLiner materials were characterized as amorphous.CONCLUSIONThe liner between the YTZP core and the heat pressed veneer may act as a weak link in this dental multilayer due to its significantly (P<.05) lower E. The present study has shown nanoindentation using spherical indentation and the multiple point load - partial unload method to be reliable predictors of E and useful evaluation tools for layered dental ceramic interfaces.

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“…Therefore, the models were created with constant outer shape, where the framework thickness was chosen to be either constant or anatomically optimized [38].…”

Section: Simulation Methods Applied In All-ceramic Bilayered Crownsmentioning

confidence: 99%

“…The results presented here show that a cusp-supporting framework design can signiicantly decrease maximum tensile stresses in the veneering material of single crowns. Therefore, it can be expected that such a design could decrease the risk of chipping in all-ceramic restorations in vivo [38].…”

Section: Insights Into Various Aspects Of Oral Healthmentioning

confidence: 99%

Assessment of All-Ceramic Dental Restorations Behavior by Development of Simulation-Based Experimental Methods

Topală¹,

Porojan²

2017

Insights Into Various Aspects of Oral Health

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New dental materials are often introduced into the market and especially in the current practice, without a basic understanding of their clinical performance because long-term controlled clinical trials are required, which are both time consuming and expensive. Ceramic materials are known for their relatively high fracture resistance and improved aesthetics, but britleness remains a concern. The stressed areas of the materials are key factors for the failure analysis, and numerical simulations may play an important role in the understanding of the behavior of all-ceramic restorations. Simulation-based medicine and the development of complex computer models of biological structures are becoming ubiquitous for advancing biomedical engineering and clinical research. The studies have to be focused on the analysis of all-ceramic restorations failures, investigating several parameters involved in the tooth structure-restoration complex, in order to improve clinical performances. The experiments have to be conducted and interpreted reported to the britle behavior of ceramic systems. Varied simulation methods are promising to assess the biomechanical behavior of all-ceramic systems, and irst principal stress criterion is an alternative for ceramic materials investigations. The development of well-designed experiments could be useful to help to predict the clinical behavior of these new allceramic restorative techniques and materials.

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A cusp supporting framework design can decrease critical stresses in veneered molar crowns

Cited by 15 publications

References 26 publications

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

Interfacial modulus mapping of layered dental ceramics using nanoindentation

Assessment of All-Ceramic Dental Restorations Behavior by Development of Simulation-Based Experimental Methods

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