Influence of Ultrasound Bone Union Stimulation on Corrosion Resistance of Titanium Alloys

The influence of bone union activation realized with the use of the low-intensity pulsed ultrasound (LIPUS) on degradation of titanium alloys was presented in the work. Ti6Al4V ELI and Ti6Al7Nb alloy samples of modified surface layer were used in the study. The preliminary surface treatments were: grinding, vibration machining, mechanical polishing, sandblasting and electrochemical polishing. The final procedures of the surface modification were anodization and steam sterilization. The scope of the work included the study of pitting corrosion resistance and concentration of metal ions released to the Ringer’s solution. The study was performed for the undeformed and deformed samples subjected to the influence of ultrasound. The reference samples were the samples kept in the solution and not having the impact of ultrasound. On the basis of the study it was found that the conditions for bone union stimulation by low intensity pulsed ultrasound do not initiate pitting corrosion of the titanium alloy samples, although they increase the mass of ions released from the surface to the solution.

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Role of low-intensity pulsed ultrasound on lumbar spondylolysis: a systematic review

Journal of the Pakistan Medical Association ◽

10.47391/jpma.3320 ◽

2021 ◽

pp. 1-10

Author(s):

Fahad Tanveer ◽

Syed Asadullah Arslan ◽

Haider Darain ◽

Ashfaq Ahmad ◽

Syed Amir Gilani ◽

...

Keyword(s):

Systematic Review ◽

Bone Union ◽

Lumbar Region ◽

Interventional Ultrasound ◽

Union Rate ◽

Pulsed Ultrasound ◽

Low Intensity Pulsed Ultrasound ◽

Low Intensity ◽

Lumbar Spondylolysis

Objective: To systematically review the role of low-intensity pulsed ultrasound on lumbar spondylolysis. Method: Literature search was conducted on PubMed, Embase, CINAHL, Web of Science, PEDro and Scopus databases to identify relevant studies published between 2010 and 2020 by using medical subject headings and applying Booleans, such as low-intensity pulsed ultrasound OR interventional ultrasound AND lumbar spine OR lumbar region AND spondylolysis OR stress fracture. Unpublished studies were hand-searched in the journals, abstracts of conferences were reviewed, and citation index was used for searching experts in the field and then contacting them for information. Studies included were the ones that had at least one of the following outcomes: bone union rate, treatment period to bone union and time to return to previous activities. Results: Of the 243 studies identified, 228(94%) were full text articles and only 2(0.8%) studies were critically appraised for qualitative synthesis based on bone union rate, treatment period to bone union, and time to return to previous activities. Conclusion: Low-intensity pulsed ultrasound was found to be effective for bone union and a useful therapy for quick return to playing sports in patients with lumbar spondylolysis. Key Words: Lumbar region, Spondylolysis, Interventional ultrasound, Systematic review.

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Bone union of painful bipartite patella after treatment with low-intensity pulsed ultrasound: Report of two cases

The Knee ◽

10.1016/j.knee.2007.10.003 ◽

2008 ◽

Vol 15 (1) ◽

pp. 50-53 ◽

Cited By ~ 7

Author(s):

Nobuyuki Kumahashi ◽

Yuji Uchio ◽

Junji Iwasa ◽

Kenzo Kawasaki ◽

Nobuo Adachi ◽

...

Keyword(s):

Bone Union ◽

Pulsed Ultrasound ◽

Low Intensity Pulsed Ultrasound ◽

Low Intensity ◽

Bipartite Patella

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III–4 The Impact of Low-Intensity Pulsed Ultrasound (LIPUS) on Spinal Fusion After Posterior Lumbar Interbody Fusion (PLIF) Procedure

Journal of Orthopaedic Trauma ◽

10.1097/01.bot.0000462963.10107.c3 ◽

2015 ◽

Vol 29 (5) ◽

pp. S5 ◽

Cited By ~ 1

Author(s):

Yasutsugu Yukawa ◽

Keigo Ito ◽

Masaaki Machino ◽

Hidehumi Inoh ◽

Hisatake Yoshihara ◽

...

Keyword(s):

Spinal Fusion ◽

Interbody Fusion ◽

Posterior Lumbar Interbody Fusion ◽

Lumbar Interbody Fusion ◽

Pulsed Ultrasound ◽

Low Intensity Pulsed Ultrasound ◽

Low Intensity ◽

The Impact

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Investigation on Microstructure and Properties of Duplex Stainless Steel Welds by Underwater Laser Welding with Different Shielding Gas

Materials ◽

10.3390/ma14174774 ◽

2021 ◽

Vol 14 (17) ◽

pp. 4774

Author(s):

Kai Wang ◽

Changlei Shao ◽

Xiangdong Jiao ◽

Jialei Zhu ◽

Zhihai Cai ◽

...

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Duplex Stainless Steel ◽

Pitting Corrosion ◽

Heat Affected Zone ◽

Shielding Gas ◽

Pure Nitrogen ◽

Pitting Corrosion Resistance ◽

Underwater Laser ◽

The Impact

Taking S32101 duplex stainless steel as the research object, underwater laser wire filling welding technology was used for U-groove filling welding. The influence of different shielding gas compositions on the ferrite content, microstructure, mechanical properties and pitting corrosion resistance was studied by simulating a water depth of 15 m in the hyperbaric chamber. The results show that, under the same process parameters, the size and proportion of austenite in the weld when using pure nitrogen as the shielding gas are larger than those protected by other shielding gases. In a mixed shielding gas, the increase in nitrogen content has little effect on the strength and toughness of the weld. Regardless of the shielding gas used, the base metal was the weakest part of the weld. At the same time, intermetallic inclusions have an adverse effect on the impact toughness of the weld. The pitting corrosion resistance of the welds depends on the Cr2N content in the heat-affected zone. The precipitation and enrichment of Cr2N causes local chromium deficiency, which is the main factor for the weak pitting corrosion ability of the heat-affected zone. Pure nitrogen protection has a better corrosion resistance than other gas protection.

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NIROSTA 4429

Alloy Digest ◽

10.31399/asm.ad.ss0787 ◽

2000 ◽

Vol 49 (5) ◽

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

High Temperature ◽

Pitting Corrosion ◽

Intergranular Corrosion ◽

Heat Treating ◽

Low Carbon ◽

High Nitrogen ◽

Temperature Performance ◽

Pitting Corrosion Resistance

Abstract Nirosta 4429 is a low-carbon, high-nitrogen version of type 316 stainless steel. The low carbon imparts intergranular corrosion resistance while the nitrogen imparts both higher strength and some increased pitting corrosion resistance. It is recommended for use as welded parts that need not or cannot be annealed after welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-787. Producer or source: ThyssenKrupp Nirosta.

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Faculty Opinions recommendation of Effects and Mechanisms of Low-Intensity Pulsed Ultrasound for Chronic Prostatitis and Chronic Pelvic Pain Syndrome.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.726483280.793536472 ◽

2017 ◽

Author(s):

Jaspreet Sandhu

Keyword(s):

Pelvic Pain ◽

Chronic Prostatitis ◽

Chronic Pelvic Pain ◽

Chronic Pelvic Pain Syndrome ◽

Pain Syndrome ◽

Pelvic Pain Syndrome ◽

Pulsed Ultrasound ◽

Low Intensity Pulsed Ultrasound ◽

Low Intensity

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Pitting Corrosion of Biomedical Titanium and Titanium Alloys: A Brief Review

Current Nanoscience ◽

10.2174/1573413716999201125221211 ◽

2020 ◽

Vol 16 ◽

Author(s):

Yu-Wei Cui ◽

Liang-Yu Chen ◽

Xin-Xin Liu

Keyword(s):

Corrosion Resistance ◽

Pitting Corrosion ◽

Potential Temperature ◽

Growth Stages ◽

Factors Affecting ◽

Ti Alloys ◽

Pitting Corrosion Resistance ◽

Superior Mechanical Properties ◽

Good Biocompatibility ◽

Main Factors

Abstract:: Thanks to their excellent corrosion resistance, superior mechanical properties and good biocompatibility, titanium (Ti) and Ti alloys are extensively applied in biomedical fields. Pitting corrosion is a critical consideration for the reliability of Ti and Ti alloys used in the human body. Therefore, this article focuses on the pitting corrosion of Ti and Ti alloys, which introduces the growth stages of pitting corrosion and its main influencing factors. Three stages, i.e. (1) breakdown of passive film, (1) metastable pitting, and (3) propagation of pitting, are roughly divided to introduce the pitting corrosion. As reviewed, corrosive environment, applied potential, temperature and alloy compositions are the main factors affecting the pitting corrosion of Ti and Ti alloys. Moreover, the pitting corrosion of different types Ti alloys are also reviewed to correlate the types of Ti alloys and the main factors of pitting corrosion. Roughly speaking, β-type Ti alloys have the best pitting corrosion resistance among the three types of Ti alloys.

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