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10-year results of a new low-monomer cement: follow-up of a randomized RSA study.

https://arctichealth.org/en/permalink/ahliterature119286
Source
Acta Orthop. 2012 Dec;83(6):604-8
Publication Type
Article
Date
Dec-2012
Author
Per Söderlund
Jon Dahl
Stephan Röhrl
Bo Nivbrant
Kjell G Nilsson
Author Affiliation
Institution of Surgery and Perioperative Sciences and Department of Orthopedics, Umeå University, Umeå, Sweden. per.soderlund@orthop.umu.se
Source
Acta Orthop. 2012 Dec;83(6):604-8
Date
Dec-2012
Language
English
Publication Type
Article
Keywords
Aged
Arthroplasty, Replacement, Hip - adverse effects - methods
Bone Cements - chemistry - therapeutic use
Confidence Intervals
Female
Follow-Up Studies
Hip Prosthesis
Humans
Male
Middle Aged
Prospective Studies
Prosthesis Design
Prosthesis Failure
Range of Motion, Articular - physiology
Risk assessment
Statistics, nonparametric
Sweden
Time Factors
Titanium
Treatment Outcome
Abstract
The properties and performance of a new low-monomer cement were examined in this prospective randomized, controlled RSA study. 5-year data have already been published, showing no statistically significant differences compared to controls. In the present paper we present the 10-year results.
44 patients were originally randomized to receive total hip replacement with a Lubinus SPII titanium-aluminum-vanadium stem cemented either with the new Cemex Rx bone cement or with control bone cement, Palacos R. Patients were examined using RSA, Harris hip score, and conventional radiographs.
At 10 years, 33 hips could be evaluated clinically and 30 hips could be evaluated with RSA (16 Cemex and 14 Palacos). 9 patients had died and 4 patients were too old or infirm to be investigated. Except for 1 hip that was revised for infection after less than 5 years, no further hips were revised before the 10-year follow-up. There were no statistically significant clinical differences between the groups. The Cemex cement had magnitudes of migration similar to or sometimes lower than those of Palacos cement. In both groups, most hips showed extensive radiolucent lines, probably due to the use of titanium alloy stems.
At 10 years, the Cemex bone cement tested performed just as well as the control (Palacos bone cement).
Notes
Cites: Acta Orthop Scand. 2001 Dec;72(6):572-8411817871
Cites: J Bone Joint Surg Br. 2004 Sep;86(7):974-815446521
Cites: Acta Orthop Scand Suppl. 1986;221:1-403468743
Cites: Br Med J (Clin Res Ed). 1988 May 21;296(6634):1454-63132290
Cites: J Biomed Mater Res. 1993 May;27(5):565-748314809
Cites: J Arthroplasty. 2000 Aug;15(5):570-510959994
Cites: Acta Orthop Scand. 1994 Feb;65(1):20-38154277
Cites: J Appl Biomater. 1995 Spring;6(1):75-837703541
Cites: J Bone Joint Surg Am. 1996 Mar;78(3):325-308613438
Cites: J Bone Joint Surg Br. 1996 Sep;78(5):802-88836075
Cites: Acta Orthop. 2008 Dec;79(6):826-3119085502
Cites: Clin Orthop Relat Res. 1993 Oct;(295):239-458403655
PubMed ID
23116438 View in PubMed
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Adhesion properties in systems of laminated pigmented polymers, carbon-graphite fiber composite framework and titanium surfaces in implant suprastructures.

https://arctichealth.org/en/permalink/ahliterature95208
Source
Dent Mater. 2009 Sep;25(9):1169-77
Publication Type
Article
Date
Sep-2009
Author
Segerström Susanna
Ruyter I Eystein
Author Affiliation
NIOM, Nordic Institute of Dental Materials, P.O. Box 70, N-1305 Haslum, Norway. susanna.segerstrom@lul.se
Source
Dent Mater. 2009 Sep;25(9):1169-77
Date
Sep-2009
Language
English
Publication Type
Article
Keywords
Adhesiveness
Carbon
Composite Resins
Dental Bonding
Dental Cements
Dental Prosthesis Design
Dental Prosthesis, Implant-Supported
Dental Stress Analysis
Denture Bases
Ethylene Glycols
Humans
Polymethacrylic Acids
Polymethyl Methacrylate
Shear Strength
Surface Properties
Titanium
Tooth, Artificial
Abstract
OBJECTIVE: For long-term stability the adhering interfaces of an implant-retained supraconstruction of titanium/carbon-graphite fiber-reinforced (CGFR) polymer/opaquer layer/denture base polymer/denture teeth must function as a unity. The aim was to evaluate adhesion of CGFR polymer to a titanium surface or CGFR polymer to two different opaquer layers/with two denture base polymers. MATERIALS AND METHODS: Titanium plates were surface-treated and silanized and combined with a bolt of CGFR polymer or denture base polymer (Probase Hot). Heat-polymerized plates of CGFR polymer (47 wt% fiber) based on poly(methyl methacrylate) and a copolymer matrix were treated with an opaquer (Sinfony or Ropak) before a denture base polymer bolt was attached (Probase Hot or Lucitone 199). All specimens were heat-polymerized, water saturated (200 days) and thermally cycled (5000 cycles, 5/55 degrees C) before shear bond testing. RESULTS: Silicatized titanium surfaces gave higher bond strength to CGFR polymer (16.2+/-2.34 and 18.6+/-1.32) MPa and cohesive fracture than a sandblasted surface (5.9+/-2.11) MPa where the fracture was adhesive. The opaquer Sinfony gave higher adhesion values and mainly cohesive fractures than the opaquer Ropak. Different surface treatments (roughened or polished) of the CGFR polymer had no effect on bond strength. SIGNIFICANCE: The fracture surfaces of silicatized titanium/CGFR polymer/opaquer layer (Sinfony)/denture base polymers were mainly cohesive. A combination of these materials in an implant-retained supraconstruction is promising for in vivo evaluation.
PubMed ID
19541363 View in PubMed
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The adoption of nickel-titanium rotary instrumentation increases root-filling quality amongst a group of Swedish general dental practitioners.

https://arctichealth.org/en/permalink/ahliterature272669
Source
Swed Dent J. 2014;38(1):15-22
Publication Type
Article
Date
2014
Author
Helena Göransson
Anders Molander
Jörgen Karlsson
Leif Jansson
Claes Reit
Source
Swed Dent J. 2014;38(1):15-22
Date
2014
Language
English
Publication Type
Article
Keywords
Dental Alloys
Dental Instruments
Equipment Design
General Practice, Dental - instrumentation - standards
Humans
Nickel - chemistry
Public Health Dentistry
Root Canal Preparation - instrumentation - methods
Sweden
Titanium - chemistry
Abstract
The aim of the present study was testing the hypothesis that the adoption of nickel-titanium rotary instrumentation (NTRI) will improve the technical quality of root-fillings. The investigation was carried out within a mandatory continuing education program (CEP) for general dental practitioners (GDPs). The study was conducted amongst GDPs employed by the Public Dental Health Service in the County of Stockholm. Identical questionnaires were distributed before the CEP (Pre-Q) and 9 to 12 months after the course (Post-Q). The CEP consisted of two parts: lectures and hands-on training. From each GDP, radiographs of two cases completed before the course and two cases treated 9-12 months after the course were randomly selected. Primarily molars were selected for evaluation. The radiographs were individually evaluated by two endodontists. Teeth treated before and after training were presented in random order. Adoption rate of NTRI increased from 35% to 75%. Cases from 124 GDPs were included in the final analysis. The rate of good quality root-fillings increased from 27% to 49% (p
PubMed ID
26995807 View in PubMed
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An ultra-clean firn core from the Devon Island Ice Cap, Nunavut, Canada, retrieved using a titanium drill specially designed for trace element studies.

https://arctichealth.org/en/permalink/ahliterature82660
Source
J Environ Monit. 2006 Mar;8(3):406-13
Publication Type
Article
Date
Mar-2006
Author
Zheng J.
Fisher D.
Blake E.
Hall G.
Vaive J.
Krachler M.
Zdanowicz C.
Lam J.
Lawson G.
Shotyk W.
Author Affiliation
GSC Northern Canada, Geological Survey of Canada, Natural Resources Canada, 601 Booth Street, Ottawa, Canada K1A 0E8. jzheng@nrcan.gc.ca
Source
J Environ Monit. 2006 Mar;8(3):406-13
Date
Mar-2006
Language
English
Publication Type
Article
Keywords
Air Pollutants - analysis
Arctic Regions
Cadmium - analysis
Environmental Monitoring - instrumentation - methods
Ice Cover - chemistry
Lead - analysis
Metals - analysis
Nunavut
Time Factors
Titanium
Abstract
An electromechanical drill with titanium barrels was used to recover a 63.7 m long firn core from Devon Island Ice Cap, Nunavut, Canada, representing 155 years of precipitation. The core was processed and analysed at the Geological Survey of Canada by following strict clean procedures for measurements of Pb and Cd at concentrations at or below the pg g(-1) level. This paper describes the effectiveness of the titanium drill with respect to contamination during ice core retrieval and evaluates sample-processing procedures in laboratories. The results demonstrate that: (1) ice cores retrieved with this titanium drill are of excellent quality with metal contamination one to four orders of magnitude less than those retrieved with conventional drills; (2) the core cleaning and sampling protocols used were effective, contamination-free, and adequate for analysis of the metals (Pb and Cd) at low pg g(-1) levels; and (3) results from 489 firn core samples analysed in this study are comparable with published data from other sites in the Arctic, Greenland and the Antarctic.
PubMed ID
16528426 View in PubMed
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Assessment of intake of copper and lead by sheep grazing on a shooting range for small arms: a case study.

https://arctichealth.org/en/permalink/ahliterature300079
Source
Environ Sci Pollut Res Int. 2019 Mar; 26(8):7337-7346
Publication Type
Journal Article
Date
Mar-2019
Author
Ida Vaa Johnsen
Espen Mariussen
Øyvind Voie
Author Affiliation
Norwegian Defence Research Establishment (FFI), 2007, Kjeller, Norway. ida-vaa.johnsen@ffi.no.
Source
Environ Sci Pollut Res Int. 2019 Mar; 26(8):7337-7346
Date
Mar-2019
Language
English
Publication Type
Journal Article
Keywords
Animals
Copper - administration & dosage - analysis
Diet
Eating
Environmental Exposure - analysis
Feeding Behavior
Firearms
Lead - administration & dosage - analysis
Liver - metabolism
Military Personnel
Norway
Poaceae - chemistry
Sheep
Soil - chemistry
Soil Pollutants - administration & dosage - analysis
Titanium - analysis
Abstract
The Norwegian Armed Forces' shooting ranges contain contamination by metals such as lead (Pb) and copper (Cu) and are often used as grazing pastures for livestock. To determine whether the sheep were at risk from grazing at a shooting range in Nord-Trøndelag (the Leksdalen shooting field), a study was conducted wherein the aim was to determine the amount of soil the sheep were eating, the accumulation of Cu and Pb in the livers of lambs grazing on the shooting ranges, and the accumulation of Pb and Cu in the grass. The grazing behavior of the sheep was mapped using GPS tracking and wildlife cameras. Soil, grass, feces, and liver samples were collected. All the samples were analyzed for Pb, Cu, and molybdenum (Mo), and soil and feces were also analyzed for titanium (Ti). Mean concentrations in grass, soil, feces, and liver was 41-7189, 1.3-29, 4-5, and 0.3 mg/kg Pb, respectively, and 42-580, 4.2-11.9, 19-23, and 273 mg/kg Cu, respectively. The soil ingestion rate was calculated using Ti in feces and soil. From these results, the theoretical dose of Cu and Pb ingested by grazing sheep was calculated. The soil ingestion rate was found to be 0.1-0.4%, significantly lower than the soil ingestion rate of 5-30% usually used for sheep. Little or no accumulation of Cu and Pb in the grass was found. There was no difference between the metal concentrations in the washed and unwashed grass. According to the calculated dose, the sheep were at little or no risk of acute or chronic Pb and Cu poisoning from grazing on the Leksdalen shooting range. The analysis of liver samples showed that lambs grazing on the shooting range did not have higher levels of Cu or Pb than lambs grazing elsewhere. None of the lambs had concentrations of Cu or Pb in their livers indicating poisoning.
PubMed ID
29644603 View in PubMed
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[A widespread innovation. Per-Ingvar BrÄnemarks method now used worldwide].

https://arctichealth.org/en/permalink/ahliterature274709
Source
Lakartidningen. 2015;112
Publication Type
Article
Date
2015

Behaviour of nitinol in osteoblast-like ROS-17 cell cultures.

https://arctichealth.org/en/permalink/ahliterature19375
Source
Biomaterials. 2002 Feb;23(3):645-50
Publication Type
Article
Date
Feb-2002
Author
A. Kapanen
J. Ilvesaro
A. Danilov
J. Ryhänen
P. Lehenkari
J. Tuukkanen
Author Affiliation
Department of Anatomy and Cell Biology, and Biocenter Oulu, University of Oulu, Finland. anita.kapanen@oulu.fi
Source
Biomaterials. 2002 Feb;23(3):645-50
Date
Feb-2002
Language
English
Publication Type
Article
Keywords
Alloys - pharmacology
Analysis of Variance
Animals
Apoptosis - drug effects
Biocompatible Materials
Cell Line
Cell Survival - drug effects
Dental Alloys
Nickel - pharmacology
Osteoblasts - drug effects
Osteosarcoma
Rats
Research Support, Non-U.S. Gov't
Titanium - pharmacology
Tumor Cells, Cultured
Abstract
Nickel titanium shape memory metal alloy Nitinol (NiTi) has been used in dental wares and in gastrointestinal surgery. Nitinol is a promising implant material in orthopedics, but its biocompatibility, especially in long-term implantation is not confirmed yet. We studied Nitinol's effect on a cell culture model. Comparisons to stainless steel, pure titanium and pure nickel were performed. The effects of Nitinol on cell death rate, the apoptosis rate and the formation of local contacts were studied on rat osteosarcoma cell line ROS-17 in 48-h cultures. The cell death rate was assessed with combined calcein-ethidium-homodimer labelling. The amount of dead cells 1000 cells were as follows: four in the NiTi, 21 in the Stst, 4.8 in the Ti and 51 in the Ni group. In the NiTi and Ti groups, the number of dead cells was significantly lower (p
PubMed ID
11771684 View in PubMed
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The bone-anchored hearing aid. Osseointegration and audiological effect.

https://arctichealth.org/en/permalink/ahliterature8196
Source
Acta Otolaryngol Suppl. 1992;492:42-5
Publication Type
Article
Date
1992
Author
P. Bonding
M H Jønsson
G. Salomon
P. Ahlgren
Author Affiliation
Department of Otolaryngology, Glostrup Hospital, Denmark.
Source
Acta Otolaryngol Suppl. 1992;492:42-5
Date
1992
Language
English
Publication Type
Article
Keywords
Adult
Aged
Bone Conduction
Denmark
Female
Hearing Aids
Humans
Male
Middle Aged
Osseointegration
Prostheses and Implants
Speech Perception
Titanium
Abstract
The results of treatment of the first 12 Danish patients with the Brånemark titanium implant system and the bone-anchored hearing aid (BAHA) are reported. All implants were osseointegrated, judged by 99mTC-scintigraphy, X-ray examination and clinical examination. Skin reactions were few, transient and short lasting. The patients experienced the BAHA to be superior to both conventional BC hearing aids and AC hearing aids in practically all respects. Speech discrimination scores in quiet and in noise were similar for the 3 types of hearing aids.
PubMed ID
1632249 View in PubMed
Less detail

[Bone-anchored hearing aids and implants in the cochlea improve hearing]

https://arctichealth.org/en/permalink/ahliterature8292
Source
Lakartidningen. 1991 Jan 16;88(3):137-8, 143-4
Publication Type
Article
Date
Jan-16-1991

Bone-titanium oxide interface in humans revealed by transmission electron microscopy and electron tomography.

https://arctichealth.org/en/permalink/ahliterature132072
Source
J R Soc Interface. 2012 Feb 7;9(67):396-400
Publication Type
Article
Date
Feb-7-2012
Author
Anders Palmquist
Kathryn Grandfield
Birgitta Norlindh
Torsten Mattsson
Rickard Brånemark
Peter Thomsen
Author Affiliation
Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden. anders.palmquist@biomaterials.gu.se
Source
J R Soc Interface. 2012 Feb 7;9(67):396-400
Date
Feb-7-2012
Language
English
Publication Type
Article
Keywords
Aged
Bone and Bones - ultrastructure
Dental Implants
Electron Microscope Tomography
Humans
Jaw, Edentulous - surgery
Male
Microscopy, Electron, Transmission
Osseointegration
Surface Properties
Sweden
Titanium
Abstract
Osseointegration, the direct contact between an implant surface and bone tissue, plays a critical role in interfacial stability and implant success. Analysis of interfacial zones at the micro- and nano-levels is essential to determine the extent of osseointegration. In this paper, a series of state-of-the-art microscopy techniques are used on laser-modified implants retrieved from humans. Partially laser-modified implants were retrieved after two and a half months' healing and processed for light and electron microscopy. Light microscopy showed osseointegration, with bone tissue growing both towards and away from the implant surface. Transmission electron microscopy revealed an intimate contact between mineralized bone and the laser-modified surface, including bone growth into the nano-structured oxide. This novel observation was verified by three-dimensional Z-contrast electron tomography, enabling visualization of an apatite layer, with different crystal direction compared with the apatite in the bone tissue, encompassing the nano-structured oxide. In conclusion, the present study demonstrates the nano-scale osseointegration and bonding between apatite and surface-textured titanium oxide. These observations provide novel data in human specimens on the ultrastructure of the titanium-bone interface.
Notes
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PubMed ID
21849383 View in PubMed
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69 records – page 1 of 7.