Temperature dependence of magnetic susceptibility in the vicinity of martensitic transformation in ferromagnetic shape memory alloys

Zablotskii, V.; Pérez-Landazábal, J.I.; Recarte, V.; Gómez‐Polo, C.

doi:10.1088/0953-8984/22/31/316004

Cited by 5 publications

(5 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the recovery process, the alloy can produce displacement and force as a function of the temperature, and the energy is derived from the phase transformation driving force. The phenomenon of the disappearance of alloy deformation and shape recovery of the alloy after the temperature increase is known as the shape memory effect [ 11 – 13 ]. Ti-Ni shape memory alloy materials are in wide use in the medical field [ 14 – 16 ] in applications such as thrombosis filters, bone plates, orthodontics wire, and cardiac and biliary stents, with the functions activated by the body temperature after implantation.…”

Section: Discussionmentioning

confidence: 99%

Applications of memory alloy stent in vertebral fractures

Yang

Zhang

Ren

et al. 2014

Med Sci Monit Basic Res

View full text Add to dashboard Cite

BackgroundThe aim of this study was to evaluate the feasibility of treating vertebral compression fractures using an autonomously developed nitinol memory alloy vertebral stent.Material/MethodsThoracolumbar vertebral specimens from adult human cadavers were made into models of compression fractures. The models were divided into group A, which received percutaneous kyphoplasty (PKP), balloon dilation, and nitinol memory alloy vertebral stent implantation (PKP + nitinol stent group); group B, which received percutaneous vertebroplasty (PVP) and direct implantation of a nitinol memory alloy vertebral stent (PVP + nitinol stent group); and group C, which received PKP, balloon dilation, and bone cement vertebroplasty (PKP + polymethylmethacrylate (PMMA) group). Vertebral heights were measured before and after the surgery and the water bath incubation to compare the impact of the 3 different surgical approaches on reducing vertebral compression.ResultsThe 3 surgical groups could all significantly restore the heights of compressed vertebral bodies. The vertebral heights of the PKP + nitinol stent group, PVP + nitinol stent group, and PKP + PMMA group were changed from the preoperative levels of (1.59±0.08) cm, (1.68±0.08) cm, and (1.66±0.11) cm to the postoperative levels of (2.00±0.09) cm, (1.87±0.04) cm, and (1.99±0.09) cm, respectively. After the water bath, the vertebral heights of each group were changed to (2.10±0.07) cm, (1.98±0.09) cm, and (2.00±0.10) cm, respectively. Pairwise comparison of the differences between the preoperative and postoperative vertebral heights showed that group A and group B differed significantly (P=0.000); group B and group C differed significantly (P=0.003); and group A and group C had no significant difference (P=0.172). Pairwise comparison of the differences in the vertebral heights before and after the water bath showed that group A and group C differed significantly (P=0.000); group B and group C differed significantly (P=0.000); and group A and group B had no significant difference (P=0.157).ConclusionsThe nitinol memory alloy stents can effectively support and reduce the compression of vertebral endplates and can be used to treat vertebral compression fractures without neurological symptoms.

show abstract

Section: Discussionmentioning

confidence: 99%

Applications of memory alloy stent in vertebral fractures

Yang

Zhang

Ren

et al. 2014

Med Sci Monit Basic Res

View full text Add to dashboard Cite

show abstract

“…The typical characteristic of memory alloy is shape memory effect, which is generally caused in martensite inverse phase change [ 25 – 27 ]. After heated to a temperature above the body temperature, the alloy generated inverse phase changed to restore its original shape immediately and produced great recovery stress to produce the orthopedic, pressure and bracing effects of the bone tissue [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

A Biomechanical Research of Growth Control of Spine by Shape Memory Alloy Staples

Zhang

Zheng

et al. 2013

BioMed Research International

View full text Add to dashboard Cite

Shape memory alloy (SMA) staples in nickel titanium with shape memory effect are effective for spinal growth control. This study was designed to evaluate the biomechanical properties of the staples and observe the stability of the fixed segments spine after the staples were implanted. According to the vertical distance of the vertebrae, SMA staples of 5, 6.5, and 8 mm were designed. The recovery stress of 24 SMA staples in three groups was measured. The pullout strength of SMA staples and stainless steel staples in each functional spinal unit was measured. Each of the six fresh specimens was divided into three conditions: normal, single staple, and double staples. Under each condition, the angle and torque of spinal movements in six directions were tested. Results show that the differences in recovery stress and maximum pullout strength between groups were statistically significant. In left and right bending, flextion, and extention, the stability of spine was decreased in conditions of single staple and double staples. Biomechanical function of SMA staples was superior to stainless steel staple. SMA staples have the function of hemiepiphyseal compression and kyphosis and scoliosis model of thoracic vertebrae in goat could be successfully created by the fusionless technique.

show abstract

“…The research stays at the level of ex vivo cadaver specimens, and there are rare articles reported in live animal experiments. [7][8][9] The clinical effect of memory alloy with temperature change and bone fusion may not be able to be observed. In this study, the pedicle puncture method was used to simulate the PVP technique, and the self-developed titanium nickel memory alloy stent was implanted into the vertebrae of experimental animals through the channel under fluoroscopy.…”

Section: Introductionmentioning

confidence: 99%

“…The six lobes SMA‐EVS can affect the created space in fractured vertebral body but inserting EVS space bone block will not affect the EVS clinical applications. The research stays at the level of ex vivo cadaver specimens, and there are rare articles reported in live animal experiments 7–9 . The clinical effect of memory alloy with temperature change and bone fusion may not be able to be observed.…”

Section: Introductionmentioning

confidence: 99%

A Preliminary Study on the Morphological Changes of an NiTi‐Shaped Memory Alloy Stent in the Vertebral Body

Ren

Bobo

et al. 2023

Orthopaedic Surgery

View full text Add to dashboard Cite

Objective: At present, the most commonly used filler polymethyl methacrylate (PMMA) has the disadvantages of monomer toxicity, heat and leakage, and cannot be applied in young people. Therefore, finding a minimally invasive and good tissue-compatible alternative material has been a research hotspot in spine surgery in recent years. The aim of this study is to explore whether the memory alloy stent can avoid the complications of bone cement or not.Methods: Four non-adjacent vertebral bodies of the thoracic and lumbar spine in the 18 10-month-old pigs were selected as the surgical site and were randomly divided into the scaffold group and the bone cement group. The memory alloy scaffold and PMMA (polymethyl methacrylate) bone cement were placed via percutaneous puncture, and intraoperative fluoroscopy and micro-CT were used to observe the changes in the height of scaffolds and bone cement in the vertebral body immediately, 6 weeks, and 12 weeks after operation, the microstructural parameters of the bone trabeculae (bone volume fraction, bone surface volume ratio, bone trabeculae number) were also measured. Results:The memory alloy stent could expand in the vertebral body, and its height gradually increased with time; additionally, the height of the bone cement mass did not change with time (p = 0.00). New bone trabeculae could grow into the scaffold along the gap, and the volume fraction of bone, the volume ratio of bone surface area, and the number of bone trabeculae increased gradually (p = 0.00). However, the volume fraction of bone, the volume ratio of bone surface area, and the number of trabeculae in the cement block decreased gradually (p = 0.00).Conclusions: Memory alloy scaffolds have dynamic expansion characteristics in vivo, which can effectively avoid the complications of bone cement. Thus, it is beneficial to explore this minimally invasive treatment for vertebral compression fractures.

show abstract

Temperature dependence of magnetic susceptibility in the vicinity of martensitic transformation in ferromagnetic shape memory alloys

Cited by 5 publications

References 55 publications

Applications of memory alloy stent in vertebral fractures

Applications of memory alloy stent in vertebral fractures

A Biomechanical Research of Growth Control of Spine by Shape Memory Alloy Staples

A Preliminary Study on the Morphological Changes of an NiTi‐Shaped Memory Alloy Stent in the Vertebral Body

Contact Info

Product

Resources

About