| Reduction | Finish Line Depth & Configuration | ||
| Anterior Crowns | All-Ceramic (veneered or monolithic) IPS e.max® or IPS Empress Esthetic® |
2.0 mm incisally 1.0 mm buccal/lingual |
0.8-1.0 mm shoulder |
| Porcelain-fused-to-zirconia | 2.0 mm incisally 0.6-1.0 mm lingual aspect (Porcelain guidance requires greater clearance) |
>0.4 mm chamfer lingually >1.0 mm labial |
|
| Metal-ceramic (Porcelain-fused-to-metal) |
2.0 mm incisally 0.5-1.0 mm lingual aspect (Porcelain guidance requires greater clearance) |
1.5 mm labial shoulder or heavy chamfer 0.5 mm lingual chamfer 1.5 mm circumferentially for 360-degree ceramic margin |
|
| Posterior Crowns | Full contour crowns (metal or zirconia) |
1.0 mm non-functional cusps 1.5 mm functional cusps |
0.3-0.5 mm shoulder or heavy chamfer |
| All-ceramic (veneered or monolithic) IPS e.max® or IPS Empress Esthetic® Porcelain-fused-to-zirconia |
2.0 mm non-functional cusps 2.5 mm functional cusps |
1.0 mm shoulder or heavy chamfer | |
| Metal-ceramic (Porcelain-fused-to-metal) |
If metal occlusal, as with FMC 2.0 mm non-functional cusps 2.5 mm functional cusps |
1.5 mm labial shoulder or chamfer 0.5mm lingual chamfer (metal collar) 1.5 mm circumferentially for 360-degree ceramic margin |
Refer to pages 82-83 of A Clinicians Guide to Prosthodontics
| Restoration | Preparation Area | Bur |
| Full metal crown | *Occlusal reduction & functional cusp bevel | Coarse grit round end tapered diamond |
| *Proximal axial reduction | Medium grit short needle diamond & coarse grit round end tapered diamond |
|
| *Buccal & lingual axial reduction | Coarse grit tapered torpedo diamond | |
| *Chamfer & axial finish line | Fine grit tapered torpedo diamond | |
| PFM Anterior | *Incisal & 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 & finish with Fine grit tapered torpedo diamond | |
| PFM Posterior | *Occlusal reduction & 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 & axial reduction | Coarse grit tapered torpedo & fine grit tapered torpedo diamond | |
| *Buccal, axial and shoulder finishing | Fine grit flat-end tapered diamond | |
| All-ceramic | *Incisal & labial reduction (2 planes) | Coarse grit flat-end tapered diamond |
| *Lingual & axial reduction | Coarse grit flat-end tapered diamond | |
| *Lingual reduction | Coarse grit football-shaped diamond | |
| *Axial wall & radial shoulder | Fine grit flat-end tapered diamond |
Refer to pages 82-83 of A Clinicians Guide to Prosthodontics
For over 15 years, we have been serving the dental industry. During that time, we have grown to be more than just a laboratory. We are drawing on our people, experience and years of innovation to deliver you exceptional results consistently, while committing to providing you the best value, products and service.
Unit 10 Digiweb Building,
IDA Business & Technology Park,
DUNDALK
Co. Louth
A91 KR80
Call us on