Stress-relieving and porcelain firing cycle influence on marginal fit of commercially pure titanium and titanium–aluminum–vanadium copings

Abstract Aims The aims of this study were to investigate the influence of commercially pure titanium (PTi) and titaniumaluminum- vanadium (Ti-6Al-4V) alloys (TiA) on the final shade of low-fusing porcelain bonded to them and to compare the shade changes with those of three conventional metal-ceramic systems. Methods and Materials A titanium casting unit was used to cast PTi and Ti-6Al-4V alloy specimens followed by A3 shade low-fusing porcelain (Noritake) being bonded to them. Gold-based (AuA), palladium-based (PdA), and nickel-chromium (Ni-Cr) alloys were cast with an automatic centrifugal casting machine, then A3 shade conventional porcelain material (Vita, VMK 95) was applied to them. Ten specimens of each metal were then fabricated. The CIE L* a* b* color coordinates of the specimens were measured with a spectrophotometer. Results All alloys had significant color changes when compared with A3 shade tabs. The color differences from the shade tabs were 5.79 for the Ti-6Al-4V group, 6.46 for PdA alloy, 8.12 for AuA alloy, 8.15 for Ni-Cr alloy, and 12.58 for PTi. The specimens differed from the shade tabs primarily because of the differences in a* and b* coordinate values. Conclusions Predictable shade reproduction of metal-ceramic restorations (MCRs) may be impaired by the underlying metal. The PTi had the greatest color differences among all the tested metal when compared with the shade tabs, whereas the Ti-6Al-4V alloy had the lowest. PTi is more likely to affect the final shade of low-fusing porcelain than Ti-6Al-4V alloy. Citation Al Wazzan KA, Al Hussaini IS. The Influence of Commercially Pure Titanium and Titanium-Aluminum- Vanadium Alloy on the Final Shade of Low-fusing Porcelain. J Contemp Dent Pract 2007 February;(8)2:097-104.

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Marginal and Internal Adaptation of Commercially Pure Titanium and Titanium- Aluminum-Vanadium Alloy Cast Restorations

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-8-1-19 ◽

2007 ◽

Vol 8 (1) ◽

pp. 19-26 ◽

Cited By ~ 12

Author(s):

Khalid A. Al Wazzan ◽

Ahmad A. Al-Nazzawi

Keyword(s):

Pure Titanium ◽

Commercially Pure Titanium ◽

Vanadium Alloy ◽

Commercially Pure ◽

Titanium Aluminum ◽

Titanium Aluminum Vanadium ◽

Internal Fit ◽

Internal Gap ◽

Single Crowns

Abstract Aim The purpose of this in vitro study was to investigate the marginal accuracy and internal fit of complete cast crowns and three-unit fixed partial dentures (FPDs) cast with commercially pure titanium (CPTi) and Titanium-Aluminum-Vanadium alloy (Ti-6Al-4V). Methods and Materials CPTi and Ti-6Al-4V alloy were used to cast twelve single crowns and twelve three-unit FPDs. A traveling microscope was used to measure marginal gap and discrepancies in internal fit. Two and oneway analysis of variance (ANOVA) analyses were used to determine the effects of the marginal and internal fit discrepancies. Results The Ti-6Al-4V alloy demonstrated a significantly smaller marginal gap than CPTi (P<0.0001). The recorded marginal discrepancies for both metals were within a clinically accepted range (<100 ìm). The single crown fit discrepancy was significantly smaller than the three-unit FPD for both the CPTi and the Ti-6Al-4V alloy (P<0.0001). For the internal fit discrepancy, the occlusal surface showed the greatest gaps. Conclusions The Ti-6Al-4V alloy demonstrated a better fit than CPTi. Single crowns showed an improved fit when compared with the three-unit FPD. Mid-occlusal internal gap demonstrated greater values than the axial internal gap. Clinical Implications This in vitro study suggested marginal fit of complete crowns and three-unit FPDs cast by CPTi or Ti-6Al-4V alloy were within the range of what is clinically acceptable for longevity of restorations. Citation Al Wazzan KA, Al-Nazzawi AA. Marginal and Internal Adaptation of Commercially Pure Titanium and Titanium-Aluminum-Vanadium Alloy Cast Restorations. J Contemp Dent Pract 2007 January;(8)1:019-026.

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Attachment ofPorphyromonas gingivalisto Corroded Commercially Pure Titanium and Titanium-Aluminum-Vanadium Alloy

Journal of Periodontology ◽

10.1902/jop.2014.130595 ◽

2014 ◽

Vol 85 (9) ◽

pp. 1275-1282 ◽

Cited By ~ 14

Author(s):

Valentim A.R. Barão ◽

Cheon Joo Yoon ◽

Mathew T. Mathew ◽

Judy Chia-Chun Yuan ◽

Christine D. Wu ◽

...

Keyword(s):

Pure Titanium ◽

Commercially Pure Titanium ◽

Vanadium Alloy ◽

Commercially Pure ◽

Titanium Aluminum ◽

Titanium Aluminum Vanadium

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The influence of mold temperature on the fit of cast crowns with commercially pure titanium

Brazilian Oral Research ◽

10.1590/s1806-83242005000200012 ◽

2005 ◽

Vol 19 (2) ◽

pp. 139-143 ◽

Cited By ~ 6

Author(s):

Wagner Sotero Fragoso ◽

Guilherme Elias Pessanha Henriques ◽

Edwin Fernando Ruiz Contreras ◽

Marcelo Ferraz Mesquita

Keyword(s):

Pure Titanium ◽

Mold Temperature ◽

Commercially Pure Titanium ◽

Mechanical Grinding ◽

Marginal Fit ◽

Commercially Pure ◽

Cp Ti

Commercially pure titanium (CP Ti) has been widely applied to fabricate cast devices because of its favorable properties. However, the mold temperature recommended for the manufacture of casts has been considered relatively low, causing inadequate castability and poor marginal fit of cast crowns. This study evaluated and compared the influence of mold temperature (430°C - as control, 550°C, 670°C) on the marginal discrepancies of cast CP Ti crowns. Eight bovine teeth were prepared on a mechanical grinding device and impressions were used to duplicate each tooth and produce eight master dies. Twenty-four crowns were fabricated using CP Ti in three different groups of mold temperature (n = 8): 430°C (as control), 550°C and 670°C. The gap between the crown and the bovine tooth was measured at 50 X magnification with a traveling microscope. The marginal fit values of the cast CP Ti crowns were submitted to the Kruskal-Wallis test (p = 0.03). The 550°C group (95.0 µm) showed significantly better marginal fit than the crowns of the 430°C group (203.4 µm) and 670°C group (213.8 µm). Better marginal fit for cast CP Ti crowns was observed with the mold temperature of 550°C, differing from the 430°C recommended by the manufacturer.

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The effect of commercially pure titanium and alternative dental alloys on the marginal fit of one-piece cast implant frameworks

Journal of Dentistry ◽

10.1016/j.jdent.2007.07.013 ◽

2007 ◽

Vol 35 (10) ◽

pp. 800-805 ◽

Cited By ~ 34

Author(s):

Érica Miranda de Torres ◽

Renata Cristina Silveira Rodrigues ◽

Maria da Gloria Chiarello de Mattos ◽

Ricardo Faria Ribeiro

Keyword(s):

Pure Titanium ◽

Commercially Pure Titanium ◽

Dental Alloys ◽

Marginal Fit ◽

Commercially Pure

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Research on microstructure and mechanical properties of explosively welded stainless steel/commercially pure Ti plate

Manufacturing Review ◽

10.1051/mfreview/2019028 ◽

2019 ◽

Vol 6 ◽

pp. 28

Author(s):

Marcin Małek ◽

Marcin Wachowski ◽

Robert Kosturek

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Explosive Welding ◽

Pure Titanium ◽

Commercially Pure Titanium ◽

Surface Protection ◽

Commercially Pure ◽

Stress Relieving ◽

Wide Range ◽

Microstructures And Mechanical Properties

Surface protection by the application of explosive welding is one of the meaningful methods used in many chemical devices like reactor condensers, heat exchangers, steam turbines and other processing apparatus. Due to the wide range of explosively welded applications, the problem of the useful lifetime of the products obtained by this method becomes important and should be well understood. Process of explosive welding is related to enormous pressure and high detonation velocity, which causes intense energy release in a short time, which favors to produce solid wavy bond featured with high metallurgical quality. Due to strain hardening in the bond zone, significant changes in microstructures and mechanical properties were observed. In this paper, 316L stainless steel explosively welded with commercially pure titanium was investigated to show the correlations and changes between microstructures and mechanical properties before and after annealing. Application of post-weld heat treatment contributes to stress relieving and improves the mechanical properties, which is closely related to microstructure recrystallization and hardness decrease adjacent to joint.

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Effect of the use of die spacer on the marginal fit of copings cast in NiCr, NiCrBe and commercially pure titanium

Brazilian Dental Journal ◽

10.1590/s0103-64402007000300009 ◽

2007 ◽

Vol 18 (3) ◽

pp. 225-230 ◽

Cited By ~ 9

Author(s):

Natércia Carreira Soriani ◽

Mônica Barbosa Leal ◽

Silvana Maria Paulino ◽

Valéria Oliveira Pagnano ◽

Osvaldo Luiz Bezzon

Keyword(s):

Metal Matrix ◽

Pure Titanium ◽

Optical Microscope ◽

Commercially Pure Titanium ◽

Marginal Fit ◽

Type Iv ◽

Commercially Pure ◽

Significant Difference ◽

Marginal Discrepancy ◽

Die Spacer

The goal of this study was to evaluate the effect of using die spacers on the marginal fit of NiCr (M1) and NiCrBe (M2) alloys and commercially pure titanium (cpTi) (M3) copings cast by the lost wax technique. Using a metal matrix, 45 resin added extra hard type IV stone models were obtained for the fabrication of wax patterns under the following conditions: no die spacer (A), with one die spacer layer (B) and with two die spacer layers (C), with five repetitions for each condition (alloy x die). Each die was waxed and the wax patterns were invested as per manufacturer's instructions. Three wax patterns were embedded in each casting ring, each corresponding to one of the conditions. Each coping, seated to the metal matrix by a seating pressure standardizing device (SPSD), was taken to an optical microscope for measurement of marginal discrepancy. The obtained data (µm) were analyzed statistically by ANOVA and Tukey' test (a=5%). There was statistically significant difference (p<0.05) among the materials (M1=110.67; M2=130.33 and M3=148.33). Regarding the use of the die spacer, there was a statistically significant difference (p<0.05) among the three conditions (A=162.00; B=131.06 and C=96.67). It was concluded that there is less marginal discrepancy with two die spacer layers.

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Evaluation of Mechanical Properties and Marginal Fit of Crowns Fabricated Using Commercially Pure Titanium and FUS-Invest

BioMed Research International ◽

10.1155/2017/5807304 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Jinshuang Wu ◽

Xianli Wang ◽

Helin Xing ◽

Tianwen Guo ◽

Chaofang Dong ◽

...

Keyword(s):

Mechanical Properties ◽

Testing Machine ◽

Pure Titanium ◽

Commercially Pure Titanium ◽

Marginal Fit ◽

Commercially Pure ◽

Universal Testing ◽

Single Crown ◽

Significant Difference ◽

Internal Fit

This study investigated the mechanical properties and single crown accuracy of the tailor-made Fourth University Stomatology investment (FUS-invest) for casting titanium. Background. Current investment for casting titanium is not optimal for obtaining high-quality castings, and the commercially available titanium investment is costly. Methods. Titanium specimens were cast using the tailor-made FUS-invest. The mechanical properties were tested using a universal testing machine. Fractured castings were characterized by energy-dispersive spectroscopy. 19 titanium crowns were produced using FUS-invest and another 19 by Symbion. The accuracy of crowns was evaluated. Results. The mechanical properties of the titanium cast by FUS-invest were elastic modulus 125.6 ± 8.8 GPa, yield strength 567.5 ± 11.1 MPa, tensile strength 671.2 ± 15.6 MPa, and elongation 4.6 ± 0.2%. For marginal fit, no significant difference (P>0.05) was found at four marker points of each group. For internal fit, no significant difference (P>0.05) was found between two groups, whereas significant difference (P<0.01) was found at different mark point of each group. Conclusions. The mechanical properties of titanium casted using FUS-invest fulfilled the ISO 9693 criteria. The marginal and internal fit of the titanium crowns using either the FUS-invest or Symbion were similar.

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RMI 0.2% Pd

Alloy Digest ◽

10.31399/asm.ad.ti0074 ◽

1979 ◽

Vol 28 (12) ◽

Keyword(s):

Corrosion Resistance ◽

Crevice Corrosion ◽

Elevated Temperatures ◽

Pure Titanium ◽

Heat Treating ◽

Low Ph ◽

Commercially Pure Titanium ◽

Bend Strength ◽

Commercially Pure ◽

Minimum Yield

Abstract RMI 0.2% Pd is a grade of commercially pure titanium to which up to 0.2% palladium has been added. It has a guaranteed minimum yield strength of 40,000 psi with good ductility and formability. It is recommended for corrosion resistance in the chemical industry and other places where the environment is mildly reducing or varies between oxidizing and reducing. The alloy has improved resistance to crevice corrosion at low pH and elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-74. Producer or source: RMI Company.

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UPM CP TITANIUM GRADE 3 (UNS R50550)

Alloy Digest ◽

10.31399/asm.ad.ti0167 ◽

2020 ◽

Vol 69 (6) ◽

Keyword(s):

Corrosion Resistance ◽

Pure Titanium ◽

Heat Treating ◽

Commercially Pure Titanium ◽

Commercially Pure ◽

Continuous Service ◽

Pure Grade ◽

Grade 3 ◽

Titanium Grade ◽

Design Stress

Abstract UPM CP Titanium Grade 3 (UNS R50550) is an unalloyed commercially pure titanium that exhibits moderate strength (higher strength than that of Titanium Grade 2), along with excellent formability and corrosion resistance. It offers the highest ASME allowable design stress of any commercially pure grade of titanium, and can be used in continuous service up to 425 °C (800 °F) and in intermittent service up to 540 °C (1000 °F). This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-167. Producer or source: United Performance Metals.

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