SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Lewin Susanne)
 

Sökning: WFRF:(Lewin Susanne) > Mechanical behaviou...

  • Lewin, SusanneUppsala universitet,Tillämpad materialvetenskap (författare)

Mechanical behaviour of composite calcium phosphate-titanium cranial implants : Effects of loading rate and design

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2020
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:uu-409750
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409750URI
  • https://doi.org/10.1016/j.jmbbm.2020.103701DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Cranial implants are used to repair bone defects following neurosurgery or trauma. At present, there is a lack of data on their mechanical response, particularly in impact loading. The aim of the present study was to assess the mechanical response of a recently developed composite calcium phosphate-titanium (CaP-Ti) implant at quasi-static and impact loading rates. Two different designs were tested, referred to as Design 1 (D1) and Design 2 (D2). The titanium structures in the implant specimens were additively manufactured by a powder-bed fusion process and subsequently embedded in a self-setting CaP material. D1 was conceptually representative of the clinically used implants. In D2, the titanium structure was simplified in terms of geometry in order to facilitate the manufacturing. The mechanical response of the implants was evaluated in quasi-static compression, and in impact using a drop-tower. Similar peak loads were obtained for the two designs, at the two loading rates: 808 ± 29 N and 852 ± 34 for D1, and 840 ± 40 N and 814 ± 13 for D2. A strain rate dependency was demonstrated for both designs, with a higher stiffness in the impact test. Furthermore, the titanium in the implant fractured in the quasi-static test (to failure) but not in the impact test (to 5.75 J) for D1. For D2, the displacement at peak load was significantly lower in the impact test than in the quasi-static test. The main difference between the designs was seen in the quasi-static test results where the deformation zones, i.e. notches in the titanium structure between the CaP tiles, in D1 likely resulted in a localization of the deformation, compared to in D2 (which did not have deformation zones). In the impact test, the only significant difference between the designs was a higher maximum displacement of D2 than of D1. In comparison with other reported mechanical tests on osteoconductive ceramic-based cranial implants, the CaP-Ti implant demonstrates the highest reported strength in quasi-static compression. In conclusion, the titanium structure seems to make the CaP-Ti implant capable of cerebral protection in impact situations like the one tested in this study.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Åberg, Jonas,1982-Uppsala universitet,Tillämpad materialvetenskap(Swepub:uu)jooab683 (författare)
  • Neuhaus, DominiqueInstitute for Biomechanics, ETH Zurich, Zurich, Switzerland (författare)
  • Engqvist, Håkan,1972-Uppsala universitet,Tillämpad materialvetenskap(Swepub:uu)hakaengq (författare)
  • Ferguson, Stephen J.Institute for Biomechanics, ETH Zurich, Zurich, Switzerland (författare)
  • Öhman, Caroline (författare)
  • Helgason, BenediktInstitute for Biomechanics, ETH Zurich, Zurich, Switzerland (författare)
  • Persson, CeciliaUppsala universitet,Tillämpad materialvetenskap(Swepub:uu)cecpe877 (författare)
  • Uppsala universitetTillämpad materialvetenskap (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Journal of The Mechanical Behavior of Biomedical Materials: Elsevier BV1041751-61611878-0180

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy