The Journal of Advanced Prosthodontics

  • 제15권6호
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  • Pages.290-301
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  • 2023
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Effect of angulation on the 3D trueness of conventional and digital implant impressions for multi-unit restorations

  • Ozay Onoral (Department of Prosthodontics, Faculty of Dentistry, Near East University) ;
  • Sevcan Kurtulmus-Yilmaz (Department of Prosthodontics, Faculty of Dentistry, Near East University) ;
  • Dilem Toksoy (Department of Prosthodontics, Faculty of Dentistry, Near East University) ;
  • Oguz Ozan (Department of Prosthodontics, Faculty of Dentistry, Near East University)
  • 투고 : 2023.08.28
  • 심사 : 2023.12.15
  • 발행 : 2023.12.29
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초록

PURPOSE. The study aimed to determine the influence of implant angulation on the trueness of multi-unit implant impressions taken through different techniques and strategies. MATERIALS AND METHODS. As reference models, three partially edentulous mandibular models (Model 1: No angulation; Model 2: No angulation for #33, 15-degree distal angulation for #35 and #37; Model 3: No angulation for #33, 25-degree distal angulation for #35 and #37) were created by modifying the angulations of implant analogues. Using a lab scanner, these reference models were scanned. The obtained data were preserved and utilized as virtual references. Three intraoral scanning (IOS) strategies: IOS-Omnicam, ISO-Quadrant, and IOS-Consecutive, as well as two traaditional techniques: splinted open tray (OT) and closed tray (CT), were used to create impressions from each reference model. The best-fit alignment approach was used to sequentially superimpose the reference and test scan data. Computations and statistical analysis of angular (AD), linear (LD), and 3D deviations (RMS) were performed. RESULTS. Model type, impression technique, as well as interaction factor, all demonstrated a significant influence on AD and LD values for all implant locations (P < .05). The Model 1 and SOT techniques displayed the lowest mean AD and LD values across all implant locations. When considering interaction factors, CT-Model 3 and SOT-Model 1 exhibited the highest and lowest mean AD and LD values, respectively. Model type, impression technique, and interaction factor all revealed significant effects on RMS values (P ≤ .001). CT-Model 3 and SOT-Model 1 presented the highest and lowest mean RMS values, respectively. CONCLUSION. Splinted-OT and IOS-Omnicam are recommended for multi-unit implant impressions to enhance trueness, potentially benefiting subsequent manufacturing stages.

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참고문헌

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