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Sökning: WFRF:(Ohkubo Chikahiro) > (2005)

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1.
  • Kokubo, Yuji, et al. (författare)
  • Clinical Marginal and Internal Gaps of In-Ceram Crowns Fabricated Using the GN-I System
  • 2005
  • Ingår i: Journal of Oral Rehabilitation. - : Wiley. - 1365-2842 .- 0305-182X. ; 32:10, s. 753-758
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The marginal and internal gaps of ceramic crowns with alumina copings fabricated using a computer-aided design, computer-aided manufacturing system, were evaluated in vivo using silicone materials. Black and white silicone materials were used to record the marginal and internal gaps of 82 In-Ceram crowns before final cementation. The silicone materials were sectioned bucco-lingually and mesio-distally and viewed under a microscope to measure the thickness of the white silicone layer. Sixteen reference points were measured on each specimen. The mean marginal gaps were compared among the anterior, premolar and molar teeth, and the mean gaps at the reference points within the groups were compared by analysis of variance and the Dunnett T3 test. The mean marginal gap was 66.8 mum. There were no differences in marginal gaps among the three groups. In all the groups, the marginal gaps were the smallest, whereas the occlusal gaps were the largest. The mean marginal gaps of the In-Ceram crowns with the alumina copings fabricated using the GN-I system were within the range of clinically acceptable values.
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2.
  • Kokubo, Yuji, et al. (författare)
  • Clinical Marginal and Internal Gaps of Procera AllCeram Crowns
  • 2005
  • Ingår i: Journal of Oral Rehabilitation. - : Wiley. - 1365-2842 .- 0305-182X. ; 32:7, s. 526-530
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • This study evaluated the marginal and internal gaps of Procera AllCeram crowns in vivo using silicone materials. Ninety Procera AllCeram crowns were evaluated before final cementation. White and black silicone materials were used to record the marginal and internal fit; then the crowns were sectioned bucco-lingually and mesio-distally to measure the thickness of the silicone layer using a microscope. Sixteen reference points were measured on each specimen. Mean marginal gaps among anterior, premolar and molar teeth, and mean gaps at the reference points within the groups were compared by analysis of variance and Dunnett T3 test. The mean values at the margins were the smallest in all tooth groups, whereas those at the rounded slope of the chamfer were the largest. There were significant differences (P < 0.001) in the mean gaps at the four reference points (margin, rounded slope of the chamfer, axial wall and occlusal surface) in each group, except for the molar teeth. The mean marginal gaps of the Procera AllCeram crowns were within the range of clinical acceptance.
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  • Resultat 1-2 av 2

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