presentation on instruments used for tooth preparation.

1. INSTRUMENTS USED FOR TOOTH
PREPARATION
Presented by
Dr.Shadman Zakir
IS-32
Department of Prosthodontics

2. Objectives of this seminar:
1.To know the proper use of the instruments.
2.Using the correct instrument on each steps.
3.Obtaining the highest efficiency of the
instruments.
4.Reduceing the chance of any mishap during
tooth preparation by using wrong instruments.
5.Serving the patient a better prosthesis with
longer durability by a correct tooth preparation
using the instruments.

3. Tooth Preparation:
Tooth preparation may be defined as
the mechanical alteration of a defective
,injured or diseased tooth to best to
receive a restoration that will establish
its healthy state including esthetic
correction where indicated,along
normal form & occlusion.

4. INSTRUMENTS FOR TOOTH
PREPARATION

5. 1.HAND PIECE(AIR TURBINE):
• Uses:it is used to rotate the diamonds and burs in tooth preparation.

6. 2.FLAT END TAPERED DIAMOND:
• In case of PFM(anterior):
• Depth orientation grooves.
• Incisal reduction.
• Labial reduction (incisal half).
• Labial reduction (gingival half)
• In case of PFM(posterior):
• Depth orientation grooves.
• Labial reduction (incisal half).
• Labial reduction (gingival half)
Uses

7. FLAT END TAPERED DIAMOND:

8. 3. ROUND END TAPERED DIAMOND
• In case of cast metal crown
• Occlusal reduction.
• Functional cusp beveling.
• Non functional cusp beveling.
• Used to place grooves on the ridges and primary
grooves.
USES:

9. In case of porcelin fused to metal crown
-Occlusal reduction.
-Functional cusp beveling.
In case of all ceramic crown
-Occlusal reduction.
-Functional cusp beveling.

10. 4.TORPEDO DIAMOND:
USES:
• IN CASE OF CAST METAL CROWN:
• Buccal & lingual reduction.
• Proximal axial reduction.
• IN CASE OF PFM (ANTERIOR):
• Lingual axial reduction.
• IN CASE OF PFM (POSTERIOR):
• Lingual and axial reduction

11. 5.TORPEDO BUR:
USES
• IN CASE OF CAST METAL CROWN:
• Chamfer finishing.
• Axial finishing.
• IN CASE OF PFM (ANTERIOR):
• Axial finishing.
• IN CASE OF PFM (POSTERIOR):
• Lingual and axial reduction & finishing.

12. 6. SHORT NEEDLE:
USES:
• IN CASE OF CAST METAL CROWN:
• Proximal axial reduction.
• IN CASE OF PFM (POSTERIOR):
• Proximal axial reduction.

13. 7. LONG NEEDLE BUR:
Uses:
IN CASE OF PFM (ANTERIOR):
-Initial proximal reduction.

14. 8.SMALL WHEEL DIAMOND:
Uses of small wheel diamond:
-Lingual reduction in PFM and full porcelain crown.

15. 9.RADIAL FISSURE BUR:
USES:
• For PFM (posterior):
• Axial & shoulder finishing.
• Facial axial and radial shoulder finishing.
• For full porcelain:
• Axial wall & radial shoulder finishing.

16. 10.FLAME DIAMOND BUR
Uses:
In anterior (PFM):
-Gingival bevel.

17. 11. CHISELS
Hand chisels can be used to highlight the facial and lingual walls of proximal
boxes
Previously used chisels Newer chisels

18. 12.LABORATORY KNIFE WITH NO 25 BLADE:
Uses:
-It is used to cut along the incisal,labial and lingual
half of the silicon putty imprint of the tooth.

19. REFERENCED BY:
FUNDAMENTAL OF FIXED PROSTHODONTICS
BY Herbart T Shillingberg