Surface roughness and fatigue performance of commercially pure titanium and Ti-6Al-4V alloy after different polishing protocols

Guilherme, Adérico Santana; Henriques, Guilherme Elias Pessanha; Zavanelli, Ricardo Alexandre; Mesquita, Marcelo Ferraz

doi:10.1016/j.prosdent.2005.01.010

Cited by 80 publications

(71 citation statements)

References 24 publications

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“…After the mechanical tests, fractures were found only in the circumferential clasps of the samples casted in Cp Ti, suggesting technical difficulties in the casting process of Ti alloys. 9,12,14,15,20,23,24 However, the radiographic exam showed no porosity in the fractured buccal arms of Cp Ti 0.75 mm subgroups, which is in agreement with previous reports. 2,12,15,[18][19][20][21][22]24 Besides, even with the fractures in the retentive arms of the clasps of some samples, retention ranging from 0.81 N to 2.84 N after 5,400 cycles was observed as a result of the retention provided by the ERA attachment system.…”

Section: Discussionsupporting

confidence: 92%

“…10,12,15,17 Characteristics, such as its biocompatibility, corrosion-fatigue resistance, low cost compared with gold alloys and desirable physical and mechanical properties, have contributed to the increased use of commercially pure Ti(Cp Ti) and its alloys. 9,23,24 For mechanical properties stand point, the Ti-based alloys present low modulus of elasticity: 105-120 GPa (http:// en.wikipedia.org/wiki/Young's_modulus). This characteristic allows Ti-based frameworks to be designed using larger retentive undercut areas than recommended for Co-Cr alloys, being therefore more advantageous in clinical scenarios where esthetics and/or periodontal health are priorities.…”

Section: Introductionmentioning

confidence: 99%

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Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture

Souza¹,

Silva²,

Coelho³

et al. 2011

The Journal of Contemporary Dental Practice

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Aim: There is little information considering the framework association between cast clasps and attachments. The aim of this study was to evaluate the retention strength of frameworks match circumferential clasps and extra resilient attachment cast in three different alloys (cobalt-chromium, nickel-chromium titanium and commercially pure titanium), using two undercut (0.25 and 0.75 mm) and considering different period of time (0, 1/2, 1, 2, 3, 4 and 5 years). Methods:Using two metallic matrices, representing a partially edentulous mandibular right hemiarch with the first molar crown, canine root and without premolars, 60 frameworks were fabricated. Three groups (n = 20) of each metal were cast and each group was divided into two subgroups (n = 10), corresponding the molar undercut of 0.25 mm and 0.75 mm. The nylon male was positioned at the matrix and attached to the acrylic resin of the prosthetic base. The samples were subjected to an insertion and removal test under artificial saliva environment. Results:The data were analyzed and compared with ANOVAs and Tukey's test at 95% of probability. The groups cast in cobaltchromium and nickel-chromium-titanium had the highest mean retention strength (5.58 N and 6.36 N respectively) without significant difference between them, but statistically different from the group cast in commercially pure titanium, which had the lowest mean retention strength in all the periods (3.46 N). The association frameworks using nickel-chromium-titanium and cobalt-chromium could be used with 0.25 mm and 0.75 mm of undercut, but the titanium samples seems to decrease the retention strength, mainly in the 0.75 mm undercut. The circumferential clasps cast in commercially pure titanium used in 0.75 mm undercuts have a potential risk of fractures, especially after the 2nd year of use. Conclusion:This in vitro study showed that the framework association between cast clasp and an extra resilient attachment are suitable to the three metals evaluated, but strongly suggest extra care with commercially pure titanium in undercut of 0.75 mm.Clinical significance: Frameworks fabricated in Cp Ti tend to decrease in retentive strength over time and have a potential risk of fracture in less than 0.75 mm of undercut.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture

Souza¹,

Silva²,

Coelho³

et al. 2011

The Journal of Contemporary Dental Practice

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“…Our result were in agreement with a previous report 17) , where surface treatments had no effect on fatigue life of titanium. Guilherme et al also reported that no correlation exists between surface roughness and fracture strength 33) ; however, surface treatments for ceramics often cause cracks on ceramics, which propagate internally causing mechanical strength to decrease. For yttria-stabilized tetragonal zirconia polycrystals, shot-blasted and acid-etched samples had lower fracture strengths relative to mirror polished samples 19,34) .…”

Section: Discussionmentioning

confidence: 99%

Influence of grade and surface topography of commercially pure titanium on fatigue properties

et al. 2018

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The objective was to investigate the influence of grade and surface topography of commercially pure titanium (Cp-Ti) on fatigue properties evaluated via staircase method. Cp-Ti grades 2 and 4 were roughened by shot blasting and acid etching, and compared with machined specimens. Yield force under static loading for Cp-Ti grades 2 and 4 were 672±51 and 1,088±93 N for machined and 724±99 and 1,118±96 N for roughened group. Yield force under cyclic loading for Cp-Ti grades 2 and 4 decreased 27 and 40% compared to static loading. Cp-Ti grade 4 demonstrated significantly greater decrease in yield force after cyclic loading; however surface topography had no effect.

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“…The titanium alloys have a high resistance to abrasion; thus they are more difficult to grind than the base metal and gold based alloys. 10 The high hardness of these alloys presents a real problem at finishing stage. 11,12 The mean marginal loss after finishing also showed statistically significant results when marginal loss in three margins were compared in groups 1A and 1B.…”

Section: Discussionmentioning

confidence: 99%

“…10 The high hardness of these alloys presents a real problem at finishing stage. 11,12 The mean marginal loss after finishing also showed statistically significant results when marginal loss in three margins were compared in groups 1A and 1B. shoulder with bevel margin showed statistically significant marginal loss when compared with chamfer and shoulder margins with p-value 0.0000 (p < 0.05).…”

Section: Discussionmentioning

confidence: 99%

Effect of Air Abrasion on the Marginal Configuration of Titanium Crowns after Casting

Nadiger¹,

Yadav²,

Malhotra³

et al. 2013

International Journal of Prosthodontics and Restorative Dentistry

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The present study was carried out to evaluate and compare the effect of air abrasion on marginal accuracy of titanium crowns after casting. A total of 90 samples were prepared which were divided in three groups of 30 specimens each of shoulder, chamfer and shoulder with bevel marginal configurations respectively. Thirty samples were air abraded using 120 μm particle size of aluminum oxide particle and remaining 30 specimens by 250 μm particle sizes respectively. The length from the reference line and tip of the cast specimens before and after sand blasting was measured with the help of traveling microscope. Same specimens were subjected to trimming for removal of alpha case layer for a standardized time, speed and pressure. The basic data of marginal discrepancy due to sand blasting and alpha case removal for each marginal configuration were evaluated and compared with data for the control group using student 't' test and ANOVA. The smaller the margin angle, the greater was the loss of alloy after air abrasion (shoulder with bevel > chamfer > shoulder). Particle size of the abrasive also influenced the vertical marginal loss, as the particle size increased from 120 to 250 μm, marginal loss also increased. Finishing of casting margins after sandblasting also induced vertical marginal loss.

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Surface roughness and fatigue performance of commercially pure titanium and Ti-6Al-4V alloy after different polishing protocols

Cited by 80 publications

References 24 publications

Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture

Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture

Influence of grade and surface topography of commercially pure titanium on fatigue properties

Effect of Air Abrasion on the Marginal Configuration of Titanium Crowns after Casting

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