Feasibility of 3D printed Co–Cr alloy for dental prostheses applications

Presotto, Anna Gabriella Camacho; Cordeiro, Jairo M.; Presotto, João Gabriel Camacho; Rangel, Elidiane Cipriano; Cruz, Nilson Cristino da; Landers, Richard; Barão, Valentim Adelino Ricardo; Mesquita, Marcelo Ferraz

doi:10.1016/j.jallcom.2020.158171

Cited by 18 publications

(13 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The high cost of gold-based alloys and new fabricating technologies, such as assisted manufacture (CAM) and 3D printing, have spurred the development of alternative alloys for dental applications, especially in implant dentistry [16][17][18]. However, this has resulted in an increase in possible corrosion and pathological effects associated with peri-implant hard and soft tissues [19].…”

Section: Discussionmentioning

confidence: 99%

Characterisation of Electroplated Gold Coatings for Dental Applications: Estimation of Thickness Using Non-Destructive Electron-Probe Microanalysis Related to Plating Time

Walton

2021

Coatings

View full text Add to dashboard Cite

Objectives: This study aimed to measure non-destructively gold (Au) electrodeposited on a high-gold alloy by modulating coating time and comparing this to sputtering Au to known thicknesses. Methods: Au was electrodeposited (plated) on 11 high-gold alloy plates (A–K) at 2.8V between 20 and 220 min. Seven Au strips were sputter coated on the same alloy to known thicknesses (range 50–500 nm). Energy dispersive X-ray spectroscopy (EDS) was used to measure minimal electron energy (E0) required to penetrate Au coatings and generate x-ray signals of 1% atomic palladium (Pd) from the underlying alloy for test samples and Au strips. % Pd X-ray concentration at maximum 30 kV was also obtained. The obtained signal–thickness relationship of known Au strip thicknesses was used to calculate Au thickness on the A–K samples based on two analytical relations. Energy dispersive X-ray fluorescence spectroscopy (XRF) was used as a complementary method to ensure coating thickness estimations were accurate. Results: EDS values for all reference and unknown thicknesses were obtained and verified with XRF. Correlating these signals with the Data Analysis Software and matching with known plating times allowed estimation of Au thickness of the unknown samples (range 27–425 nm). Estimated thicknesses were shown to have a linear relationship with plating time except for samples C–D, where there was an inverted relationship. Significance: A non-destructive method for measuring electrodeposited thickness of Au on high-gold alloys related to plating time was developed and verified. There is a linear relationship to Au thickness and plating time between 20 and 220 min.

show abstract

Section: Discussionmentioning

confidence: 99%

Characterisation of Electroplated Gold Coatings for Dental Applications: Estimation of Thickness Using Non-Destructive Electron-Probe Microanalysis Related to Plating Time

Walton

2021

Coatings

View full text Add to dashboard Cite

show abstract

“… 27 28 Although digitalized manufacturing has shown promising results, few studies have been conducted to investigate the effect of digital manufacturing techniques on the implant abutment connection misfit and screw preload. 29 30 Ramalho et al 31 compared the fit of abutments manufactured using digital, partial digital, and conventional methods and showed higher implant abutment connection misfit in fully digitalized abutments. In contrast, Bae et al 32 conducted a systematic review to compare the reliability of the marginal fit of 3DP and conventional casting, and they concluded that compared to conventional casting, 3DP techniques are reliable for the construction of fixed dental prostheses with an accurate marginal fit.…”

Section: Introductionmentioning

confidence: 99%

The effect of the digital manufacturing technique of cantilevered implant-supported frameworks on abutment screw preload

2022

View full text Add to dashboard Cite

PURPOSE The purpose of this study was to investigate the misfit and screw preload at the implant abutment connection of implant supported fixed dental prosthesis with cantilever (ICFDP) manufactured using different digital manufacturing techniques and to compare the screw preload before and after cyclic loading. MATERIALS AND METHODS Mandibular jaw model with four intra-foraminal implants was scanned using digital scanner. Stereolithography file was used to design a framework with nonengaging (NE) abutments and 10 mm cantilever distal to one terminal implant. Five frameworks were constructed using combined digital-conventional techniques (CAD-cast), and five frameworks were constructed using three-dimensional printing (3DP). Additional CAD-cast framework was constructed in a way that ensures passive fit (PF) to use as control. Scanning electron microscope (SEM) measured the implant abutment connection misfit. Sixty screws were used on the corresponding frameworks. Screws were torqued and pre-cyclic loading reverse torque value (RTV) was recorded. Frameworks were subjected to 200,000 loading cycles with a loading point 9 mm from the center of terminal implants adjacent to the cantilever and post-cyclic loading RTVs were recorded. RESULTS Microscopic readings showed significant differences between frameworks. PF demonstrated the lowest measurements of 16.04 (2.6) µm while CAD-cast demonstrated the highest measurements of 29.2 (3.1) µm. In all groups, RTVs were significantly lower than the applied torque. Post-cyclic loading RTV was significantly lower than pre-cyclic loading RTV in PF and 3DP frameworks. Differences in RTVs between the three manufacturing techniques were insignificant. CONCLUSION Although CAD-cast and three-dimensionally printed (3DP) both produce frameworks with clinically acceptable misfit, 3DP might not be the technique of choice for maintaining screw’s preload stability under an aggressive loading situation.

show abstract

“…However, their clinical success depends on a number of factors, including the properties of the alloy 2 , adequate marginal fit, and adequate metal-ceramic bond strength 3 . Cobalt-chromium alloys (Co-Cr) characteristics, such as biocompatibility 4 , marginal integrity 5 , high strength during ceramic firing, high modulus of elasticity, and low cost 6,7 , justify their current use in metal-ceramic fixed prosthesis frameworks and in Implantology 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Simplified Acid Treatment Technique in Cobalt-Chromium Alloys: Effect on Metal-Ceramic Bond Strength

et al. 2021

View full text Add to dashboard Cite

This study aim was to evaluate the influence of 37% hydrochloric acid (37% HCl) treatment of cobalt-chromium (Co-Cr) alloys on the metal-ceramic bond strength (MCBS). The specimens were sandblasted with 100-µm aluminum oxide particles and divided into four groups (n = 10) according to the surface treatment performed: control (C) -no treatment -and treated with 37% HCl for different times: 10 minutes (T1), 20 minutes (T2) and 30 minutes (T3). The samples were submitted to the 3-point bending test, and the type of failure was evaluated. Wald, Bonferroni and Pearson's tests were applied (α = 0.05). There was difference between the treatments (p = 0.019): T3 (61.57 MPa) had higher bond strength than C (51.96 MPa). The specimens presented 17.5% of adhesive and 82.5% of mixed failures. There was a weak correlation between the failure type and the MCBS. Co-Cr surface treatment with 37% HCl for 30 minutes is a promising protocol for an appropriate metal-ceramic bond strength.

show abstract

Feasibility of 3D printed Co–Cr alloy for dental prostheses applications

Cited by 18 publications

References 53 publications

Characterisation of Electroplated Gold Coatings for Dental Applications: Estimation of Thickness Using Non-Destructive Electron-Probe Microanalysis Related to Plating Time

Characterisation of Electroplated Gold Coatings for Dental Applications: Estimation of Thickness Using Non-Destructive Electron-Probe Microanalysis Related to Plating Time

The effect of the digital manufacturing technique of cantilevered implant-supported frameworks on abutment screw preload

Simplified Acid Treatment Technique in Cobalt-Chromium Alloys: Effect on Metal-Ceramic Bond Strength

Contact Info

Product

Resources

About