Tooth preparation involves the mechanical alteration of teeth to receive restorative materials. It is needed when teeth develop cavities, fractures or substance loss from abrasion or erosion. Tooth preparation designs vary based on the extent of damage and type of restorative material used. Cavities are made slightly larger than lesions and incorporate features like retention and resistance forms to ensure longevity of restorations. Common materials used for restoring teeth include dental amalgam, resin composite, and glass ionomer dental cements.

1. I N T R O D U C T I O N
T O T O O T H
P R E PA R AT I O N &
M AT E R I A L S
Dr. Maneesh Ahamed MDS
Senior Lecturer
Dept. Of Conservative Dentistry &
Endodontics

2. TEETH DEVELOP CARIOUS LESIONS OR
UNDERGO FRACTURE OR LOSS OF
SUBSTANCE DUE TO ABRASION OR
EROSION

3. W H Y D O W E
N E E D
R E S T O R AT I O N .
. . ?
Dental caries/pathology can cause:
- loss of structural integrity of tooth
- pain and other symptoms
- loss of function
- esthetic concerns

4. For removing caries and
for restoration to retain on to
the tooth, we need tooth
preparation

5. This will permit placement of a material
that will restore the tooth’s original form
and function.​

6. S O W H AT I S T O O T H
P R E PA R AT I O N . . ?
Mechanical alteration of defective injured or diseased tooth
to receive a restorative material that reestablishes a
healthy state for the tooth, including esthetic corrections
where indicated and normal form and function
DEFINITION

7. Tooth preparation designs vary according to extent of
damage and the type of restorative material to be
used.
Special drilling instruments are used at varying speeds
in combination with hand instruments for cavity
preparation.

8. The challenge with cavity preparations is that-
they must be completed with great care so that all
important design features are incorporated
while at the same time avoiding encroachment onto
the underlying vital pulpal tissues which are contained
as a core within the teeth.

9. When a cavity is prepared to remove a carious lesion it is typically slightly larger than the size of the
lesion itself.
On the tooth surface it has an outline form which refers to the perimeter of the cavity. This is also
usually a little larger than the perimeter of the carious lesion.

10. Cavity preparation designs vary according to extent of
damage and the type of restorative material to be used.
The cavity must have subtle features incorporated in its
form to ensure longevity of the restoration.

11. T H E S E F E A T U R E S A R E T Y P I C A L L Y R E F E R R E D T O A S
R E T E N T I O N A N D R E S I S T A N C E F O R M S .

12. R E T E N T I O N F O R M S R E P R E S E N T F E A T U R E S T H A T
E N A B L E A C A V I T Y T O R E T A I N A R E S T O R A T I O N I N
P L A C E W I T H O U T M O V E M E N T .

13. RESISTANCE FORMS REFER TO THE CAVITY DESIGN THAT PREVENTS
FRACTURE OF EITHER THE RESTORATION OR THE TOOTH ITSELF.

14. ALL THESE FACTORS DEPENDS UPON THE TYPE OF
RESTORATIVE MATERIAL USED!

15. G.V BLACKS CLASSIFICATION OF CARIES

16. Class I tooth preparation
Tooth preparation involving pits and fissure caries (occlusal surfaces of posterior
teeth, lingual pits of upper incisors and buccal/lingual pits of molars).

19. Class II tooth preparation
Tooth preparation on proximal surfaces of
premolars and molars.
They may be prepared in combination with
occlusal (Class I) cavity or they may occur
alone.

20. Class III tooth preparation
Class III preparation is done on the proximal
surfaces of incisors and canines without
involving the incisal edge.

21. Class IV tooth preparation
Class IV preparation is done on the proximal
surfaces of incisors and canines involving the
incisal edge.

22. Class VI tooth preparation
Tooth preparation on the incisal surfaces of
anterior teeth and cusp tips of canines, premolars
and molars

23. Class V tooth preparation
Cavity preparation on the cervical 1/3 of the labial surfaces of
incisors and canines; and on the buccal and lingual surfaces of
premolars and molars.

24. WHAT ARE THE MATERIALS
USED FOR RESTORING
TEETH...?

25. D E N TA L A M A L G A M

27. R E S I N C O M P O S I T E

29. GLASS IONOMER
DENTAL CEMENTS