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Abstract
Fixed dental prostheses such as inlay, onlay, crown, and bridge fabricated by CAD/CAM technique combined with digital impressions is getting popular due to the recent rapid progress of digital impression taking system. For the scope of implant prosthesis, however, digital intra-oral scan hasn't been actively utilized for the fabrication of superstructures. In this case report, 6 cases of titanium-milled custom abutment based on the iTero intra-oral scan data were introduced, five of them were restored with screw-type prosthesis after cementation (SCRP) and the clinical results were satisfactory on restoring the function and esthetics.
Figures and Tables
Fig. 1
Clinical pictures of case 1.
A: Peri-implant soft tissue shape after tissue-molding, B: Scan body adaptation for digital impression taking, C: Buccal bite registration by iTero intra-oral scanner, D: Computer-aided design of customized abutment using PowerMILL CAD solution, E: Polyurethane dies and model milled at the milling center, F: Milled titanium customized abutment, G: Customized abutments and SCRP-type porcelain fused-to gold prosthesis, H: Final prosthesis after excess cement removal and polishing.
Fig. 2
Intra-oral and model view of case 2.
A: Occluding scan body due to insufficient inter-arch distance, B: Polyurethane die and customized abutment, C: Customized abutment try-in, D: Final implant prosthesis after cementation.
Fig. 3
Clinical pictures of case 3.
A: Intra-oral view after implant surgery, B: Scan body adaptation (note the tissue swelling around implants), C: Computer-aided design of customized abutments, D: Polyurethane model fabricated at milling center, E: Customized abutment tryin, F: Provisional prosthesis built on customized abutments, G: Corrected margin after pick-up impression taking and additional milling, H: Cementation-type implant prosthesis.
Fig. 4
Clinical pictures on case 4.
A: Customized abutment try-in (occlusal view), B: Supragingival margin (lingual view), C: The amount of marginal discrepancy was around 1.5 mm, D: Completed implant prosthesis.
Fig. 5
Clinical pictures of case 5.
A: Initial intraoral view, B: Occluding scan body due to insufficient inter-arch distance, C: Marginal discrepancy between customized abutment and crown milled from Pt-Ag-In alloy block, D: SCRP-type final implant prosthesis.
Fig. 6
Clinical pictures of case 6.
A: Initial intraoral view, B: Scan body adaptation, C: Polyurethane model milled at milling center, D: Preparation for the cementation between customized abutment and full-zirconia crown Teflon tape is useful for temporary sealing of screw hole, E: Marginal discrepancy shown on screw-type implant prosthesis after cementation, F: Cemented final implant prosthesis.
References
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