preventive resin restoration

1. PRINCIPLE OF TOOTH PREPARATION FOR DIRECT POSTERIOR
COMPOSITE RESTORATION – PREVENTIVE RESIN RESTORATION
& MINIMAL PREPARATION FOR POSTERIOR COPMSITE CLASS I
– FINISHING & POLISHING COMPOSITE RESTORATION
Student Name : Fatemah IBRAHIM

2. CONTENT :
• Principle of tooth preparation for direct posterior composite restoration
• PRR vs fissure sealant vs small occlusal restoration .
• Indication and advantage of PRR
• Type of preventive resin restoration
• minimal preparation for posterior composite class I .
• Finishing and polishing of composite restoration

3. PREVENTIVE RESIN AND CONSERVATIVE
COMPOSITE RESTORATIONS
When restoring minimally carious pits
and fissures on an unrestored tooth,
an ultraconservative preparation
design is recommended. This design
allows for restoration of the lesion or
defect with minimal removal of the
tooth structure and often may be
combined with the use of flowable
composite or sealant to seal
radiating non-carious fissures or pits
that are at high risk for subsequent
caries activity

4. •PRR VS FISSURE SEALANT VS SMALL
OCCLUSAL RESTORATION .
PRR SEALANT FISSURE SMALL OCCLUSAL RESTORATION
• non carious occlusal surface • if the lesion limited to areas
of the tooth not bearing
occlusal loads the a prr is
apprporiate
•
• preperation involves
removing caries that has
extended to the dentine ,
maintaining a very minimal
preperation .
• if caries affects most of the
occlusal fissure system , the
clinicain should place a
classical class i restoration .

6. MINIMAL PREPARATION CLASS I

7. INDICATION OF PRR :
I. Explorer catch in a pit and fissure
II. Minimal pit and fissure caries
III. Deep pit and fissure with supplemental anatomy and small area of decay
IV. Questionable caries

8. TYPE OF PRR :
TYPE A TYPE B TYPE C

9. TYPE OF PRR
• Type I : caries is limited to enamel which can be restore by ( sealant ) , which
is very thin layer on the chewing surface
• Type II: when caries reach dentin , but in shallow depth restoring by c
backable – c flowable
• Type III : caries gets deeper so here you use it only in the sound prepared
tooth surface , and not as restorative material , using composite + fissure
sealent

10. PRINCIPLE OF TOOTH PREPERATION
.
1. minimal preperation
2. width =
3. smooth cavosurface margin
4. fissure pattern followed but no damage to the
marginal ridge
5. rounded internal angle
6. check for unsupported enamel
1.5 x width of bur

11. 1. isolation ➜ rubber dam.
2. Cleaning .
3. examination.
4. Possible selective opening of the pit if enamel lesion is suspected, using rose-head microburs at low
speed or diamond needle burs at medium speed.
5. Etching ( 15 SECONDS ) ➜wash for 30 sec and dry and bonding.
6. place composite into the cavity using condenser , apply incremental composite layers less than
2mm then light cure each one ( 20 sec)
7. over build occlusal restoration .
8. Finishing and polishing.
Operative Sequence For Preventive Resin Restorations

13. FINISHING & POLISHING
• Finishing : is removing any excess restoration to restore the anatomical land
mark “ correct the contours “
• Polishing : is refining , smoothing the surface of restoration and making it shiny
to minimize plaque accumulation .

14. FINISHING & POLISHING OF COMPOSITE
RESTORATION

15. REFRENCES :
• Sturdevant’s Art and Science of OPERATIVE DENTISTRY “ chapter 10 ”
• C10: Class I, II, and VI Direct Composite Restorations and Other Tooth-Colored
Restorations ( https://pocketdentistry.com )
• C9: Direct Composite Restorations ( https://pocketdentistry.com )

16. THANK YOU !
ANY QUESTION ?