Effect of different sterilization modes on the surface morphology, ion release, and bone reaction of retrieved micro-implants

El-Wassefy, Noha A.; El-Fallal, Abeer; Taha, Mohamed

doi:10.2319/012014-56.1

Cited by 15 publications

(8 citation statements)

References 19 publications

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“…It is difficult to determine the exact amount of released nickel from NiTi wires in the oral cavity. So, in order to measure the potential release of nickel from NiTi wires in artificial saliva, a GF-AAS was used which is considered a reliable device in detecting released ions in a liquid sample by particle per billion [ 33 – 35 ].…”

Section: Discussionmentioning

confidence: 99%

An evaluation of two types of nickel-titanium wires in terms of micromorphology and nickel ions’ release following oral environment exposure

Ghazal¹,

Hajeer

Al-Sabbagh³

et al. 2015

Prog Orthod.

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BackgroundThis study aimed to compare superelastic and heat-activated nickel-titanium orthodontic wires’ surface morphology and potential release of nickel ions following exposure to oral environment conditions.MethodsTwenty-four 20-mm-length distal cuts of superelastic (NiTi Force I®) and 24 20-mm-length distal cuts of heat-activated (Therma-Ti Lite®) nickel-titanium wires (American Orthodontics, Sheboygan, WI, USA) were divided into two equal groups: 12 wire segments left unused and 12 segments passively exposed to oral environment for 1 month. Scanning electron microscopy and atomic force microscopy were used to analyze surface morphology of the wires which were then immersed in artificial saliva for 1 month to determine potential nickel ions’ release by means of atomic absorption spectrophotometer.ResultsHeat-activated nickel-titanium (NiTi) wires were rougher than superelastic wires, and both types of wires released almost the same amount of Ni ions. After clinical exposure, more surface roughness was recorded for superelastic NiTi wires and heat-activated NiTi wires. However, retrieved superelastic NiTi wires released less Ni ions in artificial saliva after clinical exposure, and the same result was recorded regarding heat-activated wires.ConclusionsBoth types of NiTi wires were obviously affected by oral environment conditions; their surface roughness significantly increased while the amount of the released Ni ions significantly declined.

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Section: Discussionmentioning

confidence: 99%

An evaluation of two types of nickel-titanium wires in terms of micromorphology and nickel ions’ release following oral environment exposure

Ghazal¹,

Hajeer

Al-Sabbagh³

et al. 2015

Prog Orthod.

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“…Materials are qualitatively ranked from −− (very bad properties) to +++ (excellent properties) based on the literature analysis. [43,44] Synthetic biodegradable polymers PCL, PLGA, PLA + + +++ +++ +++ UV, [56] γ-irradiation, [57] β-irradiation [59] Synthetic non degradable polymers PEEK, PEKK + +++ −− +++ +++ γ-irradiation [70] Ceramics HAP, TCP +++ +/− + − + γ-irradiation [81] Metals Ti ++ ++ −− + − Autoclaving [111,112] that are clinically approved. Biomimetism also includes the osteoconductive and osteoinductive properties of the materials.…”

Section: Synthetic Bone Graft Materialsmentioning

confidence: 99%

“…[62,110] Autoclaving is the main sterilization technique used on metals since it gives better histological results than gamma-or UV-sterilized scaffolds (Table 1). [111,112] However, cutting metals slides for histology is challenging because of the hardness of the material (Table 1).…”

Section: (7 Of 17)mentioning

confidence: 99%

Additive Manufacturing of Material Scaffolds for Bone Regeneration: Toward Application in the Clinics

Garot

Bettega

Picart

2020

Adv Funct Materials

115

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Additive manufacturing (AM) allows the fabrication of customized bone scaffolds in terms of shape, pore size, material type, and mechanical properties. Combined with the possibility to obtain a precise 3D image of the bone defects using computed tomography or magnetic resonance imaging, it is now possible to manufacture implants for patient‐specific bone regeneration. This paper reviews the state‐of‐the‐art of the different materials and AM techniques used for the fabrication of 3D‐printed scaffolds in the field of bone tissue engineering. Their advantages and drawbacks are highlighted. For materials, specific criteria, are extracted from a literature study: biomimetism to native bone, mechanical properties, biodegradability, ability to be imaged (implantation and follow‐up period), histological performances, and sterilization process. AM techniques can be classified in three major categories: extrusion‐based, powder‐based, and vat photopolymerization. Their price, ease of use, and space requirement are analyzed. Different combinations of materials/AM techniques appear to be the most relevant depending on the targeted clinical applications (implantation site, presence of mechanical constraints, temporary or permanent implant). Finally, some barriers impeding the translation to human clinics are identified, notably the sterilization process.

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“…Tais manchas podem ser atribuídas ao processo de polarização que ocorreu nos MIs testados. El-Wassefy et al 22 afirmaram que os mini-implantes podem apresentar bordas mais suaves associadas aos processos de inserção e de remoção. Em um estudo realizado com mini-implantes removidos do osso e analisados por meio do MEV, estes não mostraram defeitos ou imagem sugestiva de corrosão, mas mostraram a superfície mais lisa, a ponta mais arredondada e riscos superficiais, quando comparados a MIs novos, sugerindo ter havido desgaste em sua superfície***.…”

Section: Figuraunclassified

Análise do processo de corrosão na falha clínica de mini-implantes ortodônticos

Bahia

Lopes

Caetano

et al. 2018

Rev. odontol. UNESP

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Resumo Introdução Mini-implantes ortodônticos são dispositivos de ancoragem confeccionados à base de titânio, possuindo uma camada de óxido de titânio, que desempenha função importante na resistência à corrosão. Objetivo O objetivo deste estudo foi avaliar a resistência à corrosão e a microestrutura superficial de mini-implantes novos, utilizados que foram perdidos precocemente e os que obtiveram sucesso de estabilidade, analisando se o processo de corrosão influencia a falha ou a perda de estabilidade, a fim de se comparar com as principais causas de sucesso e insucesso clínico. Material e método A amostra foi composta por 3 grupos de 7 mini-implantes divididos da seguinte maneira: Grupo C: mini-implantes na sua forma original, como são recebidos do fabricante (controle); Grupo PE: mini-implantes utilizados em pacientes e que apresentaram perda de estabilidade precoce em até 2 meses (média de 33,5 dias); Grupo E: mini-implantes utilizados em pacientes com sucesso de estabilidade (média de 230 dias). A análise visual da superfície da rosca dos mini-implantes foi feita através de microscópio eletrônico de varredura e todos foram submetidos a ensaio de polarização cíclica potenciodinâmica em potenciostato. Resultado A microestrutura superficial não foi significativamente alterada pela permanência e perda precoce de estabilidade em seus sítios ósseos. Conclusão Os dados sugeriram que a corrosão não foi fator associado à falha do dispositivo ou perda de sua estabilidade, sendo outros fatores, como o tipo do mini-implante, o seu comprimento e o local de implantação, considerados mais preponderantes com influência no seu insucesso.

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Effect of different sterilization modes on the surface morphology, ion release, and bone reaction of retrieved micro-implants

Cited by 15 publications

References 19 publications

An evaluation of two types of nickel-titanium wires in terms of micromorphology and nickel ions’ release following oral environment exposure

An evaluation of two types of nickel-titanium wires in terms of micromorphology and nickel ions’ release following oral environment exposure

Additive Manufacturing of Material Scaffolds for Bone Regeneration: Toward Application in the Clinics

Análise do processo de corrosão na falha clínica de mini-implantes ortodônticos

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