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Cryogenic transmission electron images of Phaeodactylum tricornutum isolates of small cellular particles
Apolonija Bedina Zavec, Darja Božič, Matej Hočevar, Aleš Iglič, Marko Jeran, Veronika Kralj-Iglič, Anna Romolo, 2024, objavljeni znanstveni prispevek na konferenci

Objavljeno v DiRROS: 08.03.2024; Ogledov: 57; Prenosov: 41
.pdf Celotno besedilo (24,27 MB)
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Scanning electron microscope images of Phaeodactylum tricornutum culture
Apolonija Bedina Zavec, Darja Božič, Matej Hočevar, Aleš Iglič, Marko Jeran, Veronika Kralj-Iglič, Anna Romolo, 2024, objavljeni znanstveni prispevek na konferenci

Objavljeno v DiRROS: 08.03.2024; Ogledov: 61; Prenosov: 45
.pdf Celotno besedilo (56,37 MB)
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Scanning electron microscope images of Dunaliella tertiolecta isolates of small cellular particles
Apolonija Bedina Zavec, Darja Božič, Matej Hočevar, Aleš Iglič, Marko Jeran, Anna Romolo, Veronika Kralj-Iglič, 2024, objavljeni znanstveni prispevek na konferenci

Objavljeno v DiRROS: 08.03.2024; Ogledov: 53; Prenosov: 25
.pdf Celotno besedilo (16,55 MB)
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Scanning electron microscope images of Dunaliella tertiolecta culture
Apolonija Bedina Zavec, Darja Božič, Matej Hočevar, Aleš Iglič, Marko Jeran, Veronika Kralj-Iglič, Anna Romolo, 2024, objavljeni znanstveni prispevek na konferenci

Objavljeno v DiRROS: 08.03.2024; Ogledov: 59; Prenosov: 33
.pdf Celotno besedilo (14,34 MB)
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Mechanisms of premature fracture in modular neck stems made of CoCrMo/Ti6Al4V and Ti6Al4V/Ti6Al4V alloy
Drago Dolinar, Miro Gorenšek, Klemen Avsec, Barbara Šetina, Matej Hočevar, Matjaž Godec, Borut Žužek, Mojca Debeljak, Monika Jenko, John T. Grant, Boštjan Kocjančič, 2023, izvirni znanstveni članek

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
Objavljeno v DiRROS: 07.02.2024; Ogledov: 174; Prenosov: 87
.pdf Celotno besedilo (5,12 MB)
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