SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Wennerberg Ann 1955 ) ;lar1:(gu)"

Sökning: WFRF:(Wennerberg Ann 1955 ) > Göteborgs universitet

  • Resultat 1-10 av 113
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Halldin, Anders, et al. (författare)
  • Implant Stability and Bone Remodeling after 3 and 13 Days of Implantation with an Initial Static Strain.
  • 2014
  • Ingår i: Clinical implant dentistry and related research. - 1708-8208. ; 16:3
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective Bone is constantly exposed to dynamic and static loads, which induce both dynamic and static bone strains. Although numerous studies exist on the effect of dynamic strain on implant stability and bone remodeling, the effect of static strain needs further investigation. Therefore, the effect of two different static bone strain levels on implant stability and bone remodeling at two different implantation times was investigated in a rabbit model. Methods Two different test implants with a diametrical expansion of 0.15 mm (group A) and 0.05 mm (group B) creating initial static bone strains of 0.045 and 0.015, respectively. The implants were inserted in the proximal tibial metaphysis of 24 rabbits to observe the biological response at implant removal. Both groups were compared to control implants (group C), with no diametrical increase. The insertion torque (ITQ) was measured to represent the initial stability and the removal torque (RTQ) was measured to analyze the effect that static strain had on implant stability and bone remodeling after 3 and 13 days of implantation time. Results The ITQ and the RTQ values for test implants were significantly higher for both implantation times compared to control implants. A selection of histology samples was prepared to measure bone to implant contact (BIC). There was a tendency that the BIC values for test implants were higher compared to control implants. Conclusion These findings suggest that increased static bone strain creates higher implant stability at the time of insertion, and this increased stability is maintained throughout the observed period.
  •  
2.
  • Halldin, Anders, et al. (författare)
  • The effect of static bone strain on implant stability and bone remodelling
  • 2011
  • Ingår i: Bone. - 8756-3282. ; 49:4, s. 783-9
  • Tidskriftsartikel (refereegranskat)abstract
    • Bone remodeling is a process involving both dynamic and static bone strain. Although there exist numerous studies on the effect of dynamic strain on implant stability and bone remodeling, the effect of static strain has yet to be clarified. Hence, for this purpose, the effect of static bone strain on implant stability and bone remodeling was investigated in rabbits. Based on Finite Element (FE) simulation two different test implants, with a diametrical increase of 0.15 mm (group A) and 0.05 mm (group B) creating static strains in the bone of 0.045 and 0.015 respectively, were inserted in the femur (group A) and the proximal tibia metaphysis (groups A and B respectively) of 14 rabbits to observe the biological response. Both groups were compared to control implants, with no diametrical increase (group C), which were placed in the opposite leg. At the time of surgery, the insertion torque (ITQ) was measured to represent the initial stability. The rabbits were euthanized after 24 days and the removal torque (RTQ) was measured to analyze the effect on implant stability and bone remodeling. The mean ITQ value was significantly higher for both groups A and B compared to group C regardless of the bone type. The RTQ value was significantly higher in tibia for groups A and B compared to group C while group A placed in femur presented no significant difference compared to group C. The results suggest that increased static strain in the bone not only creates higher implant stability at the time of insertion, but also generates increased implant stability throughout the observation period.
  •  
3.
  • Halldin, Anders, et al. (författare)
  • The effect of static strain
  • 2012
  • Ingår i: AstraTech World Congress, May 9-12, 2012, Göteborg, Sweden.
  • Konferensbidrag (övrigt vetenskapligt)
  •  
4.
  •  
5.
  • Sul, Young-Taeg, 1960-, et al. (författare)
  • Oxidized implants and their influence on the bone response.
  • 2001
  • Ingår i: Journal of Materials Science: Materials in Medicine. - 0957-4530. ; 12:10-12, s. 1025-31
  • Tidskriftsartikel (refereegranskat)abstract
    • Surface oxide properties are regarded to be of great importance in establishing successful osseointegration of titanium implants. Despite a large number of theoretical questions on the precise role of oxide properties of titanium implants, current knowledge obtained from in vivo studies is lacking. The present study is designed to address two aspects. The first is to verify whether oxide properties of titanium implants indeed influence the in vivo bone tissue responses. The second, is to investigate what oxide properties underline such bone tissue responses. For these purposes, screw-shaped/turned implants have been prepared by electrochemical oxidation methods, resulting in a wide range of oxide properties in terms of: (i) oxide thickness ranging from 200 to 1000 nm, (ii) the surface morphology of barrier and porous oxide film structures, (iii) micro pore configuration - pore sizes<8 microm by length, about 1.27 microm2 to 2.1 microm2 by area and porosity of about 12.7-24.4%, (iv) the crystal structures of amorphous, anatase and mixtures of anatase and rutile type, (v) the chemical compositions of TiO2 and finally, (vi) surface roughness of 0.96-1.03 microm (Sa). These implant oxide properties were divided into test implant samples of Group II, III, IV and V. Control samples (Group I) were turned commercially pure titanium implants. Quantitative bone tissue responses were evaluated biomechanically by resonance frequency analysis (RFA) and removal torque (RT) test. Quantitative histomorphometric analyses and qualitative enzyme histochemical detection of alkaline (ALP) and acidic phosphatase (ACP) activities were investigated on cut and ground sections after six weeks of implant insertion in rabbit tibia. In essence, from the biomechanical and quantitative histomorphometric measurements we concluded that oxide properties of titanium implants, i.e. the oxide thickness, the microporous structure, and the crystallinity significantly influence the bone tissue response. At this stage, however, it is not clear whether oxide properties influence the bone tissue response separately or synergistically. Copyright 2001 Kluwer Academic Publishers
  •  
6.
  • Sul, Young-Taeg, 1960-, et al. (författare)
  • Resonance frequency and removal torque analysis of implants with turned and anodized surface oxides.
  • 2002
  • Ingår i: Clin Oral Implants Res. - 0905-7161. ; 13:3, s. 252-9
  • Tidskriftsartikel (refereegranskat)abstract
    • The present experimental study was designed to address two issues. The first was to investigate whether oxide properties of titanium implants influenced bone tissue responses after an in vivo implantation time of six weeks. If such a result was found, the second aim was to investigate which oxide properties are involved in such bone tissue responses. Screw-shaped implants with a wide range of oxide properties were prepared by electrochemical oxidation methods, where the oxide thickness varied in the range of 200 nm to 1000 nm. The surface morphology was prepared in two substantially different ways, i.e. barrier and porous oxide film structures. The micropore structure revealed pore sizes of 8 microm in diameter, with a range in opening area from 1.27 microm 2 to 2.1 microm 2. Porosity ranged from 12.7% to 24.4%. The crystal structures of the titanium oxide were amorphous, anatase and a mixture of anatase and rutile type. The chemical compositions consisted mainly of TiO2. Surface roughness ranged from 0.96 microm to 1.03 microm (Sa). Each group of test samples showed its own, defined status with respect to these various parameters. The oxide properties of turned commercially pure titanium implants were used in the control group, which was characterized by an oxide thickness of 17.4 +/- 6.2 nm, amorphous type in crystallinity, TiO2 in chemical composition, and a surface roughness of 0.83 microm (Sa). Bone tissue responses were evaluated by resonance frequency measurements and removal torque tests that were undertaken six weeks after implant insertion in rabbit tibia. Implants that had an oxide thickness of approximately 600, 800 and 1000 nm demonstrated significantly stronger bone responses in the evaluation of removal torque values than did implants that had an oxide thickness of approximately 17 and 200 nm (P < 0.05). However, there were no difference between implants with oxide thicknesses of 17 and 200 nm (P = 0.99). It was concluded that oxide properties of titanium implants, which include oxide thickness, micropore configurations and crystal structures, greatly influence the bone tissue response in the evaluation of removal torque values. However, it is not fully understood whether these oxide properties influence the bone tissue response separately or synergistically.
  •  
7.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 113
Åtkomst
fritt online (5)
Typ av publikation
tidskriftsartikel (90)
forskningsöversikt (11)
konferensbidrag (7)
bokkapitel (5)
Typ av innehåll
refereegranskat (107)
övrigt vetenskapligt (6)
Författare/redaktör
Wennerberg, Ann, 195 ... (112)
Albrektsson, Tomas, ... (66)
Arvidsson, Anna, 197 ... (13)
Chrcanovic, Bruno Ra ... (12)
Franke Stenport, Vic ... (11)
Meirelles, Luiz, 197 ... (11)
visa fler...
Sul, Young-Taeg, 196 ... (9)
Andersson, Martin, 1 ... (9)
Johansson, Carina B. ... (7)
Jimbo, Ryo, 1979-, (7)
Currie, Fredrik, 197 ... (7)
Chrcanovic, B. R. (7)
Tengvall, Pentti, (5)
Jemt, Torsten, 1950- ... (5)
Sennerby, Lars, 1960 ... (5)
Kjellin, Per, 1972-, (5)
Göransson, Anna, 197 ... (5)
Lindhe, Jan, 1935-, (4)
Jacobsson, Magnus (4)
Kjellin, P (4)
Sawase, Takashi (4)
Svanborg, Lory Melin ... (4)
Berglundh, Tord, 195 ... (3)
Östman, Pär-Olov, 19 ... (3)
Gretzer, Christina, ... (3)
Halldin, Anders (3)
Kjellin, Per (3)
Milleding, Percy, 19 ... (3)
Hoffman, Maria, (3)
Jeong, Yongsoo (3)
Eliasson, Alf, 1959- ... (3)
Fröjd, Victoria, 198 ... (3)
Hansson, Stig (3)
Suketa, Naoki (3)
Trindade, Ricardo (3)
Johansson, Anders, (2)
Abrahamsson, Ingemar ... (2)
Zitzmann, Nicola, 19 ... (2)
Andersson, M (2)
Brunski, John (2)
Galli, Silvia (2)
Johansson, Anna, 196 ... (2)
Mustafa, K. (2)
Örtengren, Ulf, 1959 ... (2)
Currie, Fredrik (2)
Carlsson, Gunnar E, ... (2)
Örtorp, Anders, 1964 ... (2)
Barkarmo, Sargon, (2)
Breding, Karin (2)
Karlsson, Stig, 1944 ... (2)
visa färre...
Lärosäte
Malmö universitet (47)
Chalmers tekniska högskola (15)
RISE (1)
Örebro universitet (1)
Språk
Engelska (113)
Forskningsämne (UKÄ/SCB)
Medicin och hälsovetenskap (112)
Teknik (8)
Naturvetenskap (2)

År

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy