Reduction | Finish Line Depth & Configuration |
||
|---|---|---|---|
| Anterior Crowns | All-Ceramic(veneered or monolithic)IPS e.max® or IPS Empress Esthetic® | 2.0mm incisally 1.0mm buccal/lingual | 0.8-1.0mm shoulder |
Porcelain-fused-to-zirconia | 2.0mm incisally 0.6-1.0mm lingual aspect (Porcelain guidance requires greater clearance) | >0.4mm chamfer lingually >1.0mm labial |
|
Metal-ceramic(Porcelain-fused-to-metal) | 2.0mm incisally 0.5-1.0mm lingual aspect (Porcelain guidance requires greater clearance) | 1.5mm labial shoulder or heavy chamfer 0.5mm lingual chamfer 1.5mm circumferentially for 360-degree ceramic margin |
|
| Posterior Crowns | Full contour crowns(metal or zirconia) | 1.0mm non-functional cusps 1.5mm functional cusps | 0.3-0.5mm shoulder or heavy chamfer |
All-Ceramic(veneered or monolithic)IPS e.max® or IPS Empress Esthetic® Porcelain-fused-to-zirconia | 2.0mm non-functional cusps 2.5mm functional cusps | 1.0mm shoulder or heavy chamfer | |
Metal-ceramic(Porcelain-fused-to-metal) | If metal occlusal, as with FMC 2.0mm non-functional cusps 2.5mm functional cusps | 1.5mm labial shoulder or chamfer 0.5mm lingual chamfer (metal collar) 1.5mm circumferentially for 360-degree ceramic margin |
Restoration | Preparation Area | Bur |
|---|---|---|
| Full Metal Crown | Occlusal reduction and functional cusp bevel | Coarse grit round end tapered diamond |
| Proximal axial reduction | Medium grit short needle diamond and coarse grit round end tapered diamond |
|
| Buccal and lingual axial reduction | Coarse grit tapered torpedo diamond | |
| Chamfer and axial finish line | Fine grit tapered torpedo diamond | |
| PFM Anterior | Incisal and labial reduction | Coarse grit flat-end tapered diamond |
| Lingual reduction | Coarse grit football-shaped diamond | |
| Initial proximal reduction | Medium-grit long needle diamond | |
| Lingual axial reduction | Coarse grit tapered torpedo diamond and finish with Fine grit tapered torpedo diamond |
|
| PFM Posterior | Occlusal reduction and functional cusp bevel | Coarse grit round end tapered diamond |
| Buccal reduction (2 planes) | Coarse grit flat-end tapered diamond | |
| Proximal axial reduction | Medium grit short needle diamond | |
| Lingual and axial reduction | Coarse grit tapered torpedo and fine grit tapered torpedo diamond |
|
| Buccal, axial and shoulder finishing | Fine grit flat-end tapered diamond | |
| All-Ceramic | Incisal and labial reduction (2 planes) | Coarse grit flat-end tapered diamond |
| Lingual and axial reduction | Coarse grit flat-end tapered diamond | |
| Lingual reduction | Coarse grit football-shaped diamond | |
| Axial wall andradial shoulder | Fine grit flat-end tapered diamond |
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