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Träfflista för sökning "WFRF:(Wennerberg Ann 1955 ) ;lar1:(gu);srt2:(2006)"

Sökning: WFRF:(Wennerberg Ann 1955 ) > Göteborgs universitet > (2006)

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1.
  • Arvidsson, Anna, 1973-, et al. (författare)
  • The role of functional parameters for topographical characterization of bone-anchored implants
  • 2006
  • Ingår i: Clin Implant Dent Relat Res. ; 8:2, s. 70
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The surface topographical characterization of bone-anchored implants has been recommended to be based on amplitude, spatial, and hybrid parameters. There are also functional parameters that have the potential to describe characteristics important for a specific application. PURPOSE: The aim of the present study was to evaluate if parameters that have been described as functional in engineering applications are also relevant in the topographical characterization of bone-anchored implants. MATERIALS AND METHODS: The surface topography of threaded titanium implants with different surface roughness (S(a), S(ds), and S(dr)) was analyzed with an optical interferometer, and five candidating functional parameters (S(bi), S(ci), S(vi), S(m), and S(c)) were calculated. Examples of the same parameters for five commercially available dental implants were also calculated. Results The highest core fluid retention index (S(ci)) was displayed by the turned implants, followed by fixtures blasted with 250- and 25-microm particles, respectively. Fixtures blasted with 75-microm Al(2)O(3) particles displayed the lowest S(ci) value. This is the inverse order of the bone biological ranking based on earlier in vivo studies with the experimental surfaces included in the present study. CONCLUSION: A low core fluid retention index (S(ci)) seems favorable for bone-anchored implants. Therefore, it is suggested to include S(ci) to the set of topographical parameters for bone-anchored implants to possibly predict the biological outcome.
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2.
  • Eliasson, Alf, et al. (författare)
  • Fixed partial prostheses supported by 2 or 3 implants: a retrospective study up to 18 years
  • 2006
  • Ingår i: Int J Oral Maxillofac Implants. ; 21:4, s. 567-74
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: The purpose of this study was to evaluate and compare the long-term performance of fixed partial prostheses supported by 2 or 3 implants. MATERIALS AND METHODS: All patients treated with fixed partial prostheses supported by either 2 or 3 implants during the period 1985 to 1998 were included in this retrospective report. Annual clinical follow-up examinations were performed, with special attention to stability of the prostheses and peri-implant and occlusal conditions. Radiographic examination was performed when the prostheses were delivered (year 0) and subsequently at 1-year, 5-year, and 10-year examinations. RESULTS: A total of 178 patients had received fixed partial prostheses (FPPs) during this period of whom 123 (77 women and 46 men) were available for follow-up (mean age = 65 years, range 32-91). These 123 patients received a total of 146 implant-supported FPPs (63 two-implant- and 83 three-implant-supported) supported by 375 implants. The mean observation periods for the 2- and 3-implant-supported restorations were 9.6 years and 9.4 years (range, 5 to 18 years), respectively. Survival rates for the 2- and 3-implant-supported prostheses were 96.8% and 97.6%, respectively. The implant survival rate after loading was 98.4% for both groups. The mean bone loss at the 5-year follow-up was 0.3 mm for the 2 groups. No significant differences in bone loss (P > .05), implant failure rate (P > .05), or incidence of mechanical complications (P > .05) were found between the 2 prosthesis designs. The complications differed, significantly, with more loose gold and abutment screws in the 2-implant-supported group (P < .05) and more porcelain fractures in the 3-implant-supported group (P < .05). CONCLUSION: The 2-implant-supported partial prostheses exhibited long-term clinical performance comparable to prostheses supported by 3 implants.
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3.
  • Göransson, Anna, 1970-, et al. (författare)
  • Inflammatory response to titanium surfaces with with Potential Bioactive Properties: An In Vitro Study
  • 2006
  • Ingår i: Clinical Implant Dentistry and Related Research. ; 8:4, s. 210-217
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The current hard tissue implants research aims to accelerate bone healing by designing surfaces that are bioactive. However, the role of the inflammatory response to these surfaces is so far incompletely described. Purpose: The aim of the study was to evaluate early inflammatory response in vitro to a potentially bioactive surface—an anodized surface with Mg ions incorporated (anodized/Mg)—and to compare it to a turned, a blasted, and an anodized surface. Materials and Methods: An interferometer was used for topographical characterizations. The disks were incubated with human mononuclear cells. Adherent cells were investigated with respect to number of cells, viability, differentiation, and cytokine production with and without lipopolysaccharide stimulation after 24 and 72 hours. Results: The number of adhered mononuclear cells differed significantly between the different modified surfaces, with the highest number on the anodized surface. However, there were no significant differences in cytokine production and differentiation between the different modified surfaces. The amount of anti-inflammatory mediator interleukin-10 remained over time, while the number of cells and pro-inflammatory cytokine tumor necrosis factor-α decreased. The cells were viable on all surfaces, respectively. Conclusion: The anodized surfaces with and without Mg ions showed an increased cell adherence, however, otherwise an inflammatory response similar to the turned and blasted surfaces. Furthermore, the potentially bioactive anodized/Mg surface showed a similar response to the TiUnite-like anodized surface despite the former having a surface roughness of a smoother character.
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