Fracture Load of Monolithic CAD/CAM Lithium Disilicate Ceramic Crowns and Veneered Zirconia Crowns as a Posterior Implant Restoration

Kim, Jeehwan; Lee, Su Jeong; Park, Jun Sub; Ryu, Jae Jun

doi:10.1097/id.0b013e318278a576

Cited by 45 publications

(48 citation statements)

References 17 publications

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“…As the blocks are formed in an immediate phase due to partial crystallisation, they are easier to machine and can obtain high strength. 38 Combined with aesthetic concerns, CAD/CAM lithium disilicate monolithic crowns could be used for single crown restoration in the anterior and posterior regions. 39 …”

Section: Discussionmentioning

confidence: 99%

Influence of cyclic loading on the fracture toughness and load bearing capacities of all-ceramic crowns

Wang

et al. 2013

Int J Oral Sci

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The purpose of this study was to investigate how cyclic loading influenced the fracture toughness of hot-press lithium disilicate and zirconia core materials and whether there was an increase in the propensity for crown failure. Two types of all-ceramic crowns including the IPS e.max Press system (n=24) and the Lava zirconia system (n=24), were selected. Sectioned specimens were subjected to cyclic loading with the maximum magnitude of 200 N (R=0.1) until two million cycles. The material properties including Young's modulus (E) and hardness (H) and the fracture toughness (KIC) of the core materials were evaluated using indentation methods (n=12 each). The load-bearing capacities of the specimens were examined by means of monotonic load to fracture (n=12 each). It was found that the material properties, including E, H and KIC, of the two types of dental ceramics, were reduced. Statistical analysis indicated that there were no significant influences of fatigue loading on material properties E and H for both types of dental ceramics or KIC for zirconia, while for the IPS e.max Press core, KIC, which was parallel to the direction of the lithium disilicate crystals, was significantly reduced (P=0.001). A conclusion was drawn that zirconia possesses high mechanical reliability and sustainable capacity to resist fatigue loading, while fatigue loading remarkably degraded the anisotropic mechanical behaviour of hot-press lithium disilicate ceramics.

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Section: Discussionmentioning

confidence: 99%

Influence of cyclic loading on the fracture toughness and load bearing capacities of all-ceramic crowns

Wang

et al. 2013

Int J Oral Sci

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“…The survival rate was 97.4% after 5 years and 94.8% after 8 years of clinical service; among the technical complications, 3 crowns resulted affected by minor chipping. The study revealed that the survival rate was not influenced by cementation type (conventional versus adhesive) or by crown location (anterior versus posterior); on the other hand, in vitro researches have clearly demonstrated that lithium disilicate can bear high stress conditions, like in posterior crowns [64, 65]. Esquivel-Upshaw et al [66] conducted a 3-year clinical study comparing the performance of veneered lithium disilicate (Empress 2), monolithic lithium disilicate (e-Max Press, glazed), and metal-ceramic crowns (IPS d.SIGN veneer); they observed similar, highly positive results, although a higher degree of surface roughening was detected in the veneered lithium disilicate-based crowns, compared to metal-ceramics, between years 2 and 3.…”

Section: Clinical Indications and Outcomesmentioning

confidence: 99%

“Digitally Oriented Materials”: Focus on Lithium Disilicate Ceramics

Zarone

Ferrari

Mangano³

et al. 2016

International Journal of Dentistry

106

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The present paper was aimed at reporting the state of the art about lithium disilicate ceramics. The physical, mechanical, and optical properties of this material were reviewed as well as the manufacturing processes, the results of in vitro and in vivo investigations related to survival and success rates over time, and hints for the clinical indications in the light of the latest literature data. Due to excellent optical properties, high mechanical resistance, restorative versatility, and different manufacturing techniques, lithium disilicate can be considered to date one of the most promising dental materials in Digital Dentistry.

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“…More recently, monolithic zirconia prostheses have been proposed where the prosthesis is entirely fabricated from zirconia. Such treatment modality appears to be promising for tooth-supported prostheses [71] and implant-supported prostheses [72]. This appears to be coming from a more popular option especially with the increased application of stained or translucent zirconia that overcomes the problem of high value of zirconia [73, 74].…”

Section: Computer-aided Production Streamsmentioning

confidence: 99%

Trends in Computer-Aided Manufacturing in Prosthodontics: A Review of the Available Streams

Abduo

Lyons

Bennamoun

2014

International Journal of Dentistry

254

195

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In prosthodontics, conventional methods of fabrication of oral and facial prostheses have been considered the gold standard for many years. The development of computer-aided manufacturing and the medical application of this industrial technology have provided an alternative way of fabricating oral and facial prostheses. This narrative review aims to evaluate the different streams of computer-aided manufacturing in prosthodontics. To date, there are two streams: the subtractive and the additive approaches. The differences reside in the processing protocols, materials used, and their respective accuracy. In general, there is a tendency for the subtractive method to provide more homogeneous objects with acceptable accuracy that may be more suitable for the production of intraoral prostheses where high occlusal forces are anticipated. Additive manufacturing methods have the ability to produce large workpieces with significant surface variation and competitive accuracy. Such advantages make them ideal for the fabrication of facial prostheses.

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Fracture Load of Monolithic CAD/CAM Lithium Disilicate Ceramic Crowns and Veneered Zirconia Crowns as a Posterior Implant Restoration

Abstract: Monolithic CAD/CAM lithium disilicate crowns are applicable to posterior implant-supported restorations because the fracture load was higher than the average occlusal force.

Cited by 45 publications

References 17 publications

Influence of cyclic loading on the fracture toughness and load bearing capacities of all-ceramic crowns

Influence of cyclic loading on the fracture toughness and load bearing capacities of all-ceramic crowns

“Digitally Oriented Materials”: Focus on Lithium Disilicate Ceramics

Trends in Computer-Aided Manufacturing in Prosthodontics: A Review of the Available Streams

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