Chairside Fabrication of an All-Ceramic Partial Crown Using a Zirconia-Reinforced Lithium Silicate Ceramic

Sven Rinke, Anne-Kathrin Pabel, Matthias Rödiger, Dirk Ziebolz, Sven Rinke, Anne-Kathrin Pabel, Matthias Rödiger, Dirk Ziebolz

Abstract

The chairside fabrication of a monolithic partial crown using a zirconia-reinforced lithium silicate (ZLS) ceramic is described. The fully digitized model-free workflow in a dental practice is possible due to the use of a powder-free intraoral scanner and the computer-aided design/computer-assisted manufacturing (CAD/CAM) of the restorations. The innovative ZLS material offers a singular combination of fracture strength (>370 Mpa), optimum polishing characteristics, and excellent optical properties. Therefore, this ceramic is an interesting alternative material for monolithic restorations produced in a digital workflow.

Figures

Figure 1
Figure 1
Insufficient cast gold inlay on a lower second premolar.
Figure 2
Figure 2
Minimum material thickness recommended for all-ceramic partial crowns fabricated from zirconia-reinforced lithium silicate (ZLS) ceramics.
Figure 3
Figure 3
Finished preparation with retraction cords placed.
Figure 4
Figure 4
Intraoral scans with marked preparation line and design suggestion generated with the CEREC software (version 4.2).
Figure 5
Figure 5
Adjustment of the occlusal and proximal contacts.
Figure 6
Figure 6
Wet grinding process of the partial crown using the CEREC MXCL (Sirona Bensheim, Germany) unit.
Figure 7
Figure 7
Postprocessing of the occlusal surface and prepolishing using a diamond-impregnated polyurethane polisher.
Figure 8
Figure 8
Try-in of the prepolished partial crown.
Figure 9
Figure 9
Application of the glazing material.
Figure 10
Figure 10
Instruments and material for the mirror finish of the restoration.
Figure 11
Figure 11
Conditioning of the ceramic restoration using 5% hydrofluoric (Vita Ceramics Etch, Vita Zahnfabrik, Bad Säckingen, Germany) acid and a silane coupling agent (Calibra Silane, Dentsply DeTrey, Konstanz, Germany).
Figure 12
Figure 12
Adhesive cementation of the restoration after rubber dam application.
Figure 13
Figure 13
Clinical situation two days after adhesive cementation.

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Source: PubMed

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