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Naslov:Mechanisms of premature fracture in modular neck stems made of CoCrMo/Ti6Al4V and Ti6Al4V/Ti6Al4V alloy
Avtorji:ID Dolinar, Drago (Avtor)
ID Gorenšek, Miro (Avtor)
ID Avsec, Klemen (Avtor)
ID Šetina, Barbara (Avtor)
ID Hočevar, Matej (Avtor)
ID Godec, Matjaž (Avtor)
ID Žužek, Borut (Avtor)
ID Debeljak, Mojca (Avtor)
ID Jenko, Monika (Avtor)
ID Grant, John T. (Avtor)
ID Kocjančič, Boštjan (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.mdpi.com/2079-6412/13/7/1255
 
.pdf PDF - Predstavitvena datoteka, prenos (5,12 MB)
MD5: 6B58C322620B8F2005730EE746159AB1
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo IMT - Inštitut za kovinske materiale in tehnologije
Povzetek:In this paper, we present the mechanisms of premature fracture of modular neck stems in two case studies: (I) when the neck and stem are both made of the same Ti6Al4V alloy, and (II) when the neck and stem are made from two different alloys, CoCrMo and Ti6Al4V alloy. Our study integrates two orthopedic patients who have undergone primary uncemented THA for usual indications in two orthopedic centers (Community Health Centre and University Medical Centre). Both centers are part of the national public health care system. Both surgeries were performed by two skilled orthopedic surgeons with more than 10 years of experience in THA. The survivorship of the modular neck of cast CoCrMo alloy was 24 months. The survivorship of the modular neck from Ti6Al4V alloy was 84 months. Multivariate analyses were performed to assess the differences in the fretting, corrosion, and fatigue of the two prematurely failed modular neck stems: stereo light microscopy (SLM), scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS), and electron backscatter diffraction (EBSD). Patient demographic information, including sex, age, body mass index, survivorship of implants, and reason for the revision, was collected from medical records. We found that fretting and fatigue occurred on both neck-stem retrievals due to additional galvanic corrosion, but the CoCrMo/Ti6Al4V alloy system suffered more corrosion due to additional galvanic corrosion and fractured earlier than the Ti6Al4V/Ti6Al4V metal alloy system. Both metallic alloy systems used in this application are known to be highly corrosion-resistant, but the bio-tribo-corrosion processes need to be understood in detail and characterized so that appropriate improvements in design and materials can be made.
Ključne besede:total hip arthroplasty, modular neck, Ti6Al4V alloy, CoCrMo alloy, corrosion
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.07.2023
Založnik:MDPI
Leto izida:2023
Št. strani:str. 1-12
Številčenje:Vol. 13, iss. 7, [article no.]1255
Izvor:Švica
PID:20.500.12556/DiRROS-18131 Novo okno
UDK:617.3
ISSN pri članku:2079-6412
DOI:10.3390/coatings13071255 Novo okno
COBISS.SI-ID:160450819 Novo okno
Avtorske pravice:© 2023 by the authors
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 2. 8. 2023;
Datum objave v DiRROS:07.02.2024
Število ogledov:129
Število prenosov:79
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Coatings
Skrajšan naslov:Coatings
Založnik:MDPI AG
ISSN:2079-6412
COBISS.SI-ID:523035673 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:L3-2621
Naslov:Mehanizmi omajanja endoproteze kolka

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0132
Naslov:Fizika in kemija površin kovinskih materialov

Program financ.:Tertiary Projects of the Department of Orthopaedic Surgery of University Medical Centre Ljubljana
Številka projekta:UMCLJ 20210029

Program financ.:Tertiary Projects of the Department of Orthopaedic Surgery of University Medical Centre Ljubljana
Številka projekta:UMCLJ 201900684

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Ni določen
Ključne besede:aluminijevo-grafitne prevleke, totalna artroplastika kolka, Ti6Al4V zlitina, CoCrMo zlitina, korozija


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