Microstructural and Mechanical Characterization of CAD/CAM Materials for Monolithic Dental Restorations

Mendonça, Arthur Furtado de; Shahmoradi, Mahdi; Gouvêa, Cresus Vinícius Depes de; Souza, Grace M. De; Ellakwa, Ayman

doi:10.1111/jopr.12964

Cited by 126 publications

(146 citation statements)

References 17 publications

Supporting

Mentioning

122

Contrasting

Unclassified

Order By: Relevance

“…From in vitro studies, there is strong evidence that monolithic restorations, in contrast to bi-layered restorations, show fracture strength and fatigue resistance suitable for use in posterior areas, both in single implant-supported and 3-unit fixed prostheses [107][108][109][110][111]. In vitro fully anatomical e.max CAD crowns have been shown to exhibit fracture resistance that is suitable for posterior, monolithic restorations and to be more resistant to fatigue in cyclic loading than veneered zirconia, which is more prone to chipping [112,113]. LS2 glass ceramics have a relatively high flexural strength and fracture toughness for prosthodontic restorations.…”

Section: Lithium Disilicate Glassmentioning

confidence: 99%

Ceramic Materials and Technologies Applied to Digital Works in Implant-Supported Restorative Dentistry

Pyo

Kim²,

Han

et al. 2020

Materials

View full text Add to dashboard Cite

Computer-aided design and manufacturing technology has been closely associated with implant-supported restoration. The digital system employed for prosthodontic restorations comprises data acquisition, processing, and manufacturing using subtractive or additive methods. As digital implantology has developed, optical scanning, computer-based digital algorithms, fabricating techniques, and numerical control skills have all rapidly improved in terms of their accuracy, which has resulted in the development of new ceramic materials with advanced esthetics and durability for clinical application. This study reviews the application of digital technology in implant-supported dental restoration and explores two globally utilized ceramic restorative materials: Yttria-stabilized tetragonal zirconia polycrystalline and lithium disilicate glass ceramics.

show abstract

Section: Lithium Disilicate Glassmentioning

confidence: 99%

Ceramic Materials and Technologies Applied to Digital Works in Implant-Supported Restorative Dentistry

Pyo

Kim²,

Han

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…Since this design comes with no veneering layer, no chipping fractures are expected. Previous studies have shown favorable results in the overall strength and clinical performance of monolithic zirconia FDPs . Compared to veneered ones, however, monolithic zirconia FDPs still show inferior esthetic properties.…”

mentioning

confidence: 96%

Evaluation of Stress Distribution in Tooth‐Supported Fixed Dental Prostheses Made of Translucent Zirconia with Variations in Framework Designs: A Three‐Dimensional Finite Element Analysis

Bakitian

Papia

Larsson

et al. 2020

Journal of Prosthodontics

View full text Add to dashboard Cite

Purpose:To evaluate the influence of the framework designs on the stress distribution within tooth-supported partially veneered fixed dental prostheses (FDPs) made of translucent zirconia under simulated loads using a three-dimensional finite element analysis (3D-FEA). Material and Methods: For a linear 3D-FEA, simplified 3D solid models of prepared abutment teeth (first premolar and first molar) with different 3-unit FDPs were created. The models with different FDP designs-monolithic zirconia (control); semimonolithic zirconia with 0.3 mm veneer thickness (SM0.3); semi-monolithic zirconia with 0.5 mm veneer thickness (SM0.5); semi-monolithic zirconia with 0.5 mm veneer thickness supported with cap design (SMC), and semi-monolithic zirconia with 0.5 mm veneer thickness supported with wave design (SMW)-were analyzed using 3D-FEA. The elastic properties of the components (bone, dentine, cement, translucent zirconia, and veneering porcelain) were obtained from the published data for FEA. Simulated static loading forces (300 N) were applied at 10°oblique direction over six points in the occlusal surfaces of the FDPs. Maximum principal stress, shear stress, and safety factor were calculated and analyzed among the different models. Results: Semi-monolithic with cap design showed the smallest maximum principal stress levels in the veneering porcelain compared to all other models (SM0.3, SM0.5, SMW). The SM0.3 had lower maximum principal stress levels in the veneering porcelain compared to SM0.5. Regarding stresses in the zirconia framework, all models had comparable results in maximum principal tensile stresses, except SMW had a lower value. Maximum principal stress levels were located in the veneer component of SM0.3, SM0.5, and SMW, whereas, such levels were observed in the cervical areas of the zirconia frameworks of SMC and control. The SM0.3 had the highest maximum shear stress levels at the zirconia-veneer interface, while SMW had the lowest shear values. The 3D-FEA models with different FDP designs showed different minimum safety factor levels. Conclusions: Framework and veneer designs play a significant role in the stress distribution of the partially veneered zirconia FDPs under loading. The FDPs with zirconia frameworks with cap design minimize the maximum principal tensile stress in the veneering porcelain. The FDPs with 0.3-mm-veneering porcelain show low maximum principal tensile stress in the veneering porcelain, but highest maximum shear stress at the zirconia-veneer interface. The FDPs with wave design of zirconia frameworks minimize the maximum shear stress considerably.

show abstract

“…PICN consists of a resin polymer network structure comprised of triethylene glycol dimethacrylate (TEGDMA) and urethane dimethacrylate (UDMA), surrounded by a leucite‐reinforced, zirconia‐containing feldspar ceramic . The physical properties of the material have been investigated, and it is now marketed for fabricating full‐contour implant‐supported crowns …”

mentioning

confidence: 99%

Human Gingival Epithelial Growth In Vitro on a Polymer‐Infiltrated Ceramic Network Restorative Material

Smallidge

Sabol

Aita-Holmes

et al. 2019

Journal of Prosthodontics

View full text Add to dashboard Cite

Purpose: To investigate the growth of primary human gingival epithelial (HGE) cells on polymer-infiltrated ceramic network (PICN) material (Vita Enamic) with different surface roughnesses. Materials and Methods: PICN material specimens were polished with either silica carbide paper (grit-polished) or the manufacturer's polishing wheels (wheel-polished), and the surface roughness (R a ) measured. HGE cells were seeded and grown for 1, 3, or 6 days. Growth on tissue culture plastic was used as a control. Non-linear regression analysis was used to examine the effect of surface roughness on cell growth. Results: HGE cell growth on tissue culture plastic fitted an exponential growth model over the 6-day experimental period (R 2 = 0.966). Through day 6, cell density on PICN decreased with increasing surface roughness, with a fit to an exponential decay model (R 2 = 0.666). A threshold R a value of 0.254 µm (95% CI 0.177-0.332) was determined as an upper limit for exponential growth. Cell growth was greatest on the group of specimens with R a value below 0.127µm. Specimens polished by the manufacturer's method produced surface roughness of 0.118 µm and below. Conclusions: PICN material polished to a smooth surface (R a < 0.254 µm) resulted in exponential growth of HGE cell growth compared to rough surfaces. Polishing PICN material as smooth as possible (below a R a of 0.127 µm) was found to maximize epithelial cell growth on the PICN material surface. The manufacturer's polishing method achieved a sufficiently smooth surface. These results are contrary to previous research regarding surface roughness of transgingival implant restoration components. The study results suggest that smoother restorative material surfaces could improve peri-implant soft tissue health.

show abstract

Microstructural and Mechanical Characterization of CAD/CAM Materials for Monolithic Dental Restorations

Cited by 126 publications

References 17 publications

Ceramic Materials and Technologies Applied to Digital Works in Implant-Supported Restorative Dentistry

Ceramic Materials and Technologies Applied to Digital Works in Implant-Supported Restorative Dentistry

Evaluation of Stress Distribution in Tooth‐Supported Fixed Dental Prostheses Made of Translucent Zirconia with Variations in Framework Designs: A Three‐Dimensional Finite Element Analysis

Human Gingival Epithelial Growth In Vitro on a Polymer‐Infiltrated Ceramic Network Restorative Material

Contact Info

Product

Resources

About