Browsing Bergen Open Research Archive by Author "Gjerdet, Nils Roar"
Now showing items 1-15 of 15
-
Assessment of retention force and bone apposition in two differently coated femoral stems after 6 months of loading in a goat model
Harboe, Knut; Gjerdet, Nils Roar; Sudmann, Einar; Indrekvam, Kari; Søreide, Kjetil (Peer reviewed; Journal article, 2014-08-16)Background: Since the introduction of uncemented hip implants, there has been a search for the best surface coating to enhance bone apposition in order to improve retention. The surface coating of the different stems varies ... -
Can bone apposition predict the retention force of a femoral stem? An experimental weight-bearing hip-implant model in goats
Harboe, Knut; Ellingsen, Christian Lycke; Sudmann, Einar; Gjerdet, Nils Roar; Søreide, Kjetil; Indrekvam, Kari (Peer reviewed; Journal article, 2015-04-28)Background: The increasing incidence of prosthesis revision surgery in the Western world has led to an increased focus on the capacity for stem removal. We previously reported on a femoral stem implanted in goats with an ... -
Corrosion and metal release from overlapping arterial stents under mechanical and electrochemical stress - An experimental study
Høl, Paul Johan; Gjerdet, Nils Roar; Jonung, Torbjörn (Peer reviewed; Journal article, 2019)Intra-arterial stenosis due to atherosclerosis is often treated with endovascular balloon dilatation with a metal stent. Restenosis is common and is frequently treated with a new stent placed inside the existing one or the ... -
The effect of blood protein adsorption on cellular uptake of anatase TiO2 nanoparticles
Allouni, Zouhir Ekeland; Gjerdet, Nils Roar; Cimpan, Mihaela Roxana; Høl, Paul Johan (Peer reviewed; Journal article, 2015-01-19)Protein adsorption onto nanoparticles (NPs) in biological fluids has emerged as an important factor when testing biological responses to NPs, as this may influence both uptake and subsequent toxicity. The aim of the present ... -
The effect of preparation taper on the resistance to fracture of monolithic zirconia crowns
Schriwer, Christian; Gjerdet, Nils Roar; Arola, Dwayne; Øilo, Marit (Journal article; Peer reviewed, 2021)Objective Monolithic zirconia crowns have become a viable alternative to conventional layered restorations. The aim of this study was to evaluate whether the taper, and thus wall thickness, of the abutment or pre-defined ... -
Effect of saliva contamination on the bond strength of single-step and three-step adhesive systems
Bolme, June; Gjerdet, Nils Roar; Lægreid, Torgils (Journal article; Peer reviewed, 2021)The aim of this study was to evaluate the effect of saliva contamination on bond strength to dentin with an etch-and-rinse and a self-etch adhesive system. For each of these adhesive systems, the dentin surface of 24 human ... -
Efficacy of treating segmental bone defects through endochondral ossification: 3D printed designs and bone metabolic activities
Hara, Kenji; Hellem, Endre; Yamada, Shuntaro; Sariibrahimoglu, Kemal; Mølster, Anders; Gjerdet, Nils Roar; Hellem, Sølve; Mustafa, Kamal Babikeir Elnour; Yassin, Mohammed Ahmed Alamin Yousif (Journal article; Peer reviewed, 2022)Three-dimensional printing (3D printing) is a promising technique for producing scaffolds for bone tissue engineering applications. Porous scaffolds can be printed directly, and the design, shape and porosity can be ... -
An experimental study of low-level laser therapy in rat Achilles tendon injury
Joensen, Jon; Gjerdet, Nils Roar; Hummelsund, Steinar; Iversen, Vegard Vereide; Lopes-Martins, Rodrigo Álvaro Brandão; Bjordal, Jan Magnus (Peer reviewed; Journal article, 2011-05-06)The aim of this controlled animal study was to investigate the effect of low-level laser therapy (LLLT) administered 30 min after injury to the Achilles tendon. The study animals comprised 16 Sprague Dawley male rats divided ... -
Fractographic analysis of 35 clinically fractured bi-layered and monolithic zirconia crowns
Skjold, Anneli; Schriwer, Christian; Gjerdet, Nils Roar; Øilo, Marit (Journal article; Peer reviewed, 2022)Objectives The aim of this retrieval study was to analyze the fracture features and identify the fracture origin of zirconia-based single crowns that failed during clinical use. Methods Thirty-five fractured single crowns ... -
Fractographic features of glass-ceramic and zirconia-based dental restorations fractured during clinical function
Øilo, Marit; Hardang, Anne Dybdahl; Ulsund, Amanda Hembre; Gjerdet, Nils Roar (Peer reviewed; Journal article, 2014-04-04)Fractures during clinical function have been reported as the major concern associated with all-ceramic dental restorations. The aim of this study was to analyze the fracture features of glass-ceramic and zirconia-based ... -
Monolithic zirconia crowns – wall thickness, surface treatment and load at fracture
Øilo, Marit; Schriwer, Christian; Flinn, Brian; Gjerdet, Nils Roar (Peer reviewed; Journal article, 2019)Purpose: The aim of this study was to evaluate the effect of wall thickness on load at fracture of monolithic zirconia dental crowns after aging. Materials and Methods: Seventy translucent monolithic zirconia crowns (DD ... -
Novel Nanoparticulate and Ionic Titanium Antigens for Hypersensitivity Testing
Høl, Paul Johan; Kristoffersen, Einar Klæboe; Gjerdet, Nils Roar; Pellowe, Amanda (Peer reviewed; Journal article, 2018-04-06)Titanium is used in a wide variety of materials ranging from medical devices to materials used in everyday life. Adverse biological reactions that could occur in patients, consumers, and workers should be monitored and ... -
Simulation of clinical fractures for three different all-ceramic crowns
Øilo, Marit; Kvam, Ketil; Gjerdet, Nils Roar (Peer reviewed; Journal article, 2014-04-04)Comparison of fracture strength and fracture modes of different all-ceramic crown systems is not straightforward. Established methods for reliable testing of all-ceramic crowns are not currently available. Published in-vitro ... -
Strength of Pulvertaft modifications: tensile testing of porcine flexor tendons
Strandenes, Eivind; Ellison, Peter; Mølster, Anders; Gjerdet, Nils Roar; Moldestad, Irene Ohlen; Høl, Paul Johan (Peer reviewed; Journal article, 2019)The aim of the study was to present two new modifications of the Pulvertaft weave, allowing a higher number of weaves without the need for a longer overlap. The mechanical properties were measured and compared with the ... -
Strength of side-to-side and step-cut repairs in tendon transfers: biomechanical testing of porcine flexor tendons
Strandenes, Eivind; Ellison, Peter; Mølster, Anders; Gjerdet, Nils Roar; Moldestad, Irene Ohlen; Høl, Paul Johan (Journal article; Peer reviewed, 2020)The aim of the study was to compare side-to-side with step-cut repairs to determine how much of the width it is possible to remove and still keep the repair strong enough to start active mobilization. Porcine flexor tendons ...