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CCaavviittyy pprreeppaarraattiioonn 
aaccccoorrddiinngg GG..VV..BBllaacckk 
IIII.. BBllaacckk ccllaassss 
Upload By : Ahmed Ali Abbas 
Babylon University College of Dentistry 
download this file from Website on google 
theoptimalsmile.wix.com/dentistry 
GROUP: C
G.V. Black’s Approach to 
Cavity Preparation 
1. Outline form 
2. Resistance form 
3. Retention form 
4. Convenience form 
5. Removal of remaining caries 
6. Finish enamel walls 
7. Clean cavity preparation
G.V. Black’s Approach to 
Cavity Preparation 
1. OOuuttlliinnee ffoorrmm 
 Based primarily on the location and extent of the caries. 
 Final outline form is not established until the carious 
dentin and, usually, its overlying enamel has been 
removed
G.V. Black’s Approach to 
Cavity Preparation 
22.. RReessiissttaannccee ffoorrmm 
 Resistance to both fracture of the tooth and filling 
material must be built in so both will be resistant to 
fracture during function
G.V. Black’s Approach to 
Cavity Preparation 
33.. RReetteennttiioonn ffoorrmm 
 The tooth preparation must be shaped in such a 
way to retain the filling material, without 
weakening the remaining tooth structure
G.V. Black’s Approach to 
Cavity Preparation 
44.. CCoonnvveenniieennccee ffoorrmm 
 Allows adequate observation, accessibility, and ease of 
operation during the preparation and restoration of the 
tooth. 
 Only the minimal amount of reduction that will provide 
the necessary convenience should be done
G.V. Black’s Approach to 
Cavity Preparation 
Re 5. Remmoovvaall ooff tthhee rreemmaaiinniinngg ccaarriieess 
 Deeper caries not removed by the initial cavity 
preparation is now removed. Care must be 
exercised as the pulp may be in close proximity.
G.V. Black’s Approach to 
Cavity Preparation 
6. Finish ooff eennaammeell wwaallllss aanndd mmaarrggiinnss 
 Remove unsupported enamel, make the margins 
smooth and continuous to facilitate finishing of 
the restoration.
G.V. Black’s Approach to 
Cavity Preparation 
7. CClleeaann tthhee ccaavviittyy pprreeppaarraattiioonn 
 Rinse away all debris and dry the cavity 
preparation.
BBllaacckk ccllaassss IIII.. pprreeppaarraattiioonn
BBllaacckk ccllaassss IIII.. pprreeppaarraattiioonn
Features of the Class II preparation: 
 open gingival, lingual, buccal contacts; 
 dove tail; reverse “S”; convergent walls; 
 even depth; 
 smooth surfaces; 
 no sharp angles.
SSTTAANNDDAARRDD PPRRIINNCCIIPPLLEESS 
MMaarrggiinnss 9900°° ((ppeerrppeennddiiccuullaarr)) ttoo ttaannggeenntt ttoo 
ccaarrvvoossuurrffaaccee 
PPrrooppeerr cclleeaarraannccee:: 00..2255mmmm –– 00..55mmmm 
OOcccclluussaall,, aaxxiiaall aanndd ggiinnggiivvaall wwaallllss iinn ddeennttiinn
EExxtteennssiioonn
s Provide vertical suuppppoorrtt ffoorr oocccclluussaall ffoorrcceess 
AAvvooiidd iinncclliinneedd ppllaanneess
s Provide vertical suuppppoorrtt ffoorr oocccclluussaall ffoorrcceess 
CCoonnvveerrtt iinncclliinneedd ppllaanneess ttoo ““sstteeppss””
PPrreeppaarraattiioonn 
Incorporate the reverse-S curve (all walls 
approx. 90 degrees to cavosurface) 
Black II - MOD
PPrreeppaarraattiioonn 
Proximal box and 
rounded axiopulpal angle
PPrreeppaarraattiioonn 
Just open” buccal proximal 
wall
BBllaacckk IIII -- ccoonnttaacctt ppooiinntt 
Positive contact
MMaattrriixx rreettaaiinneerr
MMaattrriixx ssyysstteemm 
AA mmaattrriixx ssyysstteemm pprroovviiddeess aanndd ttaakkeess tthhee ppllaaccee 
ooff tthhee pprrooxxiimmaall ttooootthh ssuurrffaaccee tthhaatt wwaass rreemmoovveedd 
ttoo rreessttoorree tthhee pprrooxxiimmaall ccoonnttoouurrss aanndd ccoonnttaacctt ttoo 
tthheeiirr nnoorrmmaall sshhaappee aanndd ffuunnccttiioonn..
PPoosstteerriioorr MMaattrriixx SSyysstteemm 
 UUnniivveerrssaall rreettaaiinneerr 
 AAllssoo rreeffeerrrreedd ttoo aass tthhee TToofffflleemmiirree rreettaaiinneerr.. TThhiiss 
ddeevviiccee hhoollddss tthhee mmaattrriixx bbaanndd iinn ppoossiittiioonn.. TThhee 
rreettaaiinneerr iiss ppoossiittiioonneedd mmoosstt ccoommmmoonnllyy ffrroomm tthhee 
bbuuccccaall ssuurrffaaccee ooff tthhee ttooootthh bbeeiinngg rreessttoorreedd..
Components ooff aa UUnniivveerrssaall RReettaaiinneerr
PPoosstteerriioorr MMaattrriixx SSyysstteemm 
 MMaattrriixx bbaannddss 
MMaattrriixx bbaannddss aarree mmaaddee ooff fflleexxiibbllee ssttaaiinnlleessss sstteeeell 
aanndd aarree aavvaaiillaabbllee iinn pprreemmoollaarr,, mmoollaarr,, aanndd uunniivveerrssaall 
ssiizzeess aanndd tthhiicckknneesssseess.. 
TThhee llaarrggeerr cciirrccuummffeerreennccee ooff tthhee bbaanndd iiss tthhee 
oocccclluussaall eeddggee aanndd iiss aallwwaayyss ppllaacceedd ttoowwaarrdd tthhee 
oocccclluussaall ssuurrffaaccee.. 
TThhee ssmmaalllleerr cciirrccuummffeerreennccee ooff tthhee bbaanndd iiss tthhee 
ggiinnggiivvaall eeddggee aanndd iitt iiss aallwwaayyss ppllaacceedd ttoowwaarrdd tthhee 
ggiinnggiivvaa..
WWeeddggeess 
 AA wweeddggee iiss eeiitthheerr ttrriiaanngguullaarr oorr rroouunndd aanndd 
mmaaddee ooff wwoooodd oorr ppllaassttiicc.. 
 TThhee wweeddggee iiss iinnsseerrtteedd iinnttoo tthhee lliinngguuaall 
eemmbbrraassuurree ttoo ppoossiittiioonn tthhee mmaattrriixx bbaanndd ffiirrmmllyy 
aaggaaiinnsstt tthhee ggiinnggiivvaall mmaarrggiinn ooff tthhee pprreeppaarraattiioonn..
AA wweeddggee ccoorrrreeccttllyy ppoossiittiioonneedd..
SSeeccttiioonnaall MMaattrriicceess 
 AA tthhiinn ppoolliisshheedd ppaallooddeenntt--ttyyppee bbaanndd aanndd aa 
tteennssiioonn rriinngg pprroodduuccee aa ttiigghhtt aannaattoommiicc ccoonnttaacctt 
ffoorr ccoommppoossiittee rreessiinn mmaatteerriiaallss ffoorr ccllaassss IIII 
rreessttoorraattiioonnss..
SSeeccttiioonnaall mmaattrriicceess..
TThhaannkk yyoouu ffoorr aatttteennttiioonn!!

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Cavity preparation-according-g.v.black.09.may.2011

  • 1. CCaavviittyy pprreeppaarraattiioonn aaccccoorrddiinngg GG..VV..BBllaacckk IIII.. BBllaacckk ccllaassss Upload By : Ahmed Ali Abbas Babylon University College of Dentistry download this file from Website on google theoptimalsmile.wix.com/dentistry GROUP: C
  • 2. G.V. Black’s Approach to Cavity Preparation 1. Outline form 2. Resistance form 3. Retention form 4. Convenience form 5. Removal of remaining caries 6. Finish enamel walls 7. Clean cavity preparation
  • 3. G.V. Black’s Approach to Cavity Preparation 1. OOuuttlliinnee ffoorrmm  Based primarily on the location and extent of the caries.  Final outline form is not established until the carious dentin and, usually, its overlying enamel has been removed
  • 4. G.V. Black’s Approach to Cavity Preparation 22.. RReessiissttaannccee ffoorrmm  Resistance to both fracture of the tooth and filling material must be built in so both will be resistant to fracture during function
  • 5. G.V. Black’s Approach to Cavity Preparation 33.. RReetteennttiioonn ffoorrmm  The tooth preparation must be shaped in such a way to retain the filling material, without weakening the remaining tooth structure
  • 6. G.V. Black’s Approach to Cavity Preparation 44.. CCoonnvveenniieennccee ffoorrmm  Allows adequate observation, accessibility, and ease of operation during the preparation and restoration of the tooth.  Only the minimal amount of reduction that will provide the necessary convenience should be done
  • 7. G.V. Black’s Approach to Cavity Preparation Re 5. Remmoovvaall ooff tthhee rreemmaaiinniinngg ccaarriieess  Deeper caries not removed by the initial cavity preparation is now removed. Care must be exercised as the pulp may be in close proximity.
  • 8. G.V. Black’s Approach to Cavity Preparation 6. Finish ooff eennaammeell wwaallllss aanndd mmaarrggiinnss  Remove unsupported enamel, make the margins smooth and continuous to facilitate finishing of the restoration.
  • 9. G.V. Black’s Approach to Cavity Preparation 7. CClleeaann tthhee ccaavviittyy pprreeppaarraattiioonn  Rinse away all debris and dry the cavity preparation.
  • 10. BBllaacckk ccllaassss IIII.. pprreeppaarraattiioonn
  • 11. BBllaacckk ccllaassss IIII.. pprreeppaarraattiioonn
  • 12. Features of the Class II preparation:  open gingival, lingual, buccal contacts;  dove tail; reverse “S”; convergent walls;  even depth;  smooth surfaces;  no sharp angles.
  • 13. SSTTAANNDDAARRDD PPRRIINNCCIIPPLLEESS MMaarrggiinnss 9900°° ((ppeerrppeennddiiccuullaarr)) ttoo ttaannggeenntt ttoo ccaarrvvoossuurrffaaccee PPrrooppeerr cclleeaarraannccee:: 00..2255mmmm –– 00..55mmmm OOcccclluussaall,, aaxxiiaall aanndd ggiinnggiivvaall wwaallllss iinn ddeennttiinn
  • 15. s Provide vertical suuppppoorrtt ffoorr oocccclluussaall ffoorrcceess AAvvooiidd iinncclliinneedd ppllaanneess
  • 16. s Provide vertical suuppppoorrtt ffoorr oocccclluussaall ffoorrcceess CCoonnvveerrtt iinncclliinneedd ppllaanneess ttoo ““sstteeppss””
  • 17. PPrreeppaarraattiioonn Incorporate the reverse-S curve (all walls approx. 90 degrees to cavosurface) Black II - MOD
  • 18. PPrreeppaarraattiioonn Proximal box and rounded axiopulpal angle
  • 19. PPrreeppaarraattiioonn Just open” buccal proximal wall
  • 20. BBllaacckk IIII -- ccoonnttaacctt ppooiinntt Positive contact
  • 22. MMaattrriixx ssyysstteemm AA mmaattrriixx ssyysstteemm pprroovviiddeess aanndd ttaakkeess tthhee ppllaaccee ooff tthhee pprrooxxiimmaall ttooootthh ssuurrffaaccee tthhaatt wwaass rreemmoovveedd ttoo rreessttoorree tthhee pprrooxxiimmaall ccoonnttoouurrss aanndd ccoonnttaacctt ttoo tthheeiirr nnoorrmmaall sshhaappee aanndd ffuunnccttiioonn..
  • 23. PPoosstteerriioorr MMaattrriixx SSyysstteemm  UUnniivveerrssaall rreettaaiinneerr  AAllssoo rreeffeerrrreedd ttoo aass tthhee TToofffflleemmiirree rreettaaiinneerr.. TThhiiss ddeevviiccee hhoollddss tthhee mmaattrriixx bbaanndd iinn ppoossiittiioonn.. TThhee rreettaaiinneerr iiss ppoossiittiioonneedd mmoosstt ccoommmmoonnllyy ffrroomm tthhee bbuuccccaall ssuurrffaaccee ooff tthhee ttooootthh bbeeiinngg rreessttoorreedd..
  • 24. Components ooff aa UUnniivveerrssaall RReettaaiinneerr
  • 25. PPoosstteerriioorr MMaattrriixx SSyysstteemm  MMaattrriixx bbaannddss MMaattrriixx bbaannddss aarree mmaaddee ooff fflleexxiibbllee ssttaaiinnlleessss sstteeeell aanndd aarree aavvaaiillaabbllee iinn pprreemmoollaarr,, mmoollaarr,, aanndd uunniivveerrssaall ssiizzeess aanndd tthhiicckknneesssseess.. TThhee llaarrggeerr cciirrccuummffeerreennccee ooff tthhee bbaanndd iiss tthhee oocccclluussaall eeddggee aanndd iiss aallwwaayyss ppllaacceedd ttoowwaarrdd tthhee oocccclluussaall ssuurrffaaccee.. TThhee ssmmaalllleerr cciirrccuummffeerreennccee ooff tthhee bbaanndd iiss tthhee ggiinnggiivvaall eeddggee aanndd iitt iiss aallwwaayyss ppllaacceedd ttoowwaarrdd tthhee ggiinnggiivvaa..
  • 26. WWeeddggeess  AA wweeddggee iiss eeiitthheerr ttrriiaanngguullaarr oorr rroouunndd aanndd mmaaddee ooff wwoooodd oorr ppllaassttiicc..  TThhee wweeddggee iiss iinnsseerrtteedd iinnttoo tthhee lliinngguuaall eemmbbrraassuurree ttoo ppoossiittiioonn tthhee mmaattrriixx bbaanndd ffiirrmmllyy aaggaaiinnsstt tthhee ggiinnggiivvaall mmaarrggiinn ooff tthhee pprreeppaarraattiioonn..
  • 27. AA wweeddggee ccoorrrreeccttllyy ppoossiittiioonneedd..
  • 28. SSeeccttiioonnaall MMaattrriicceess  AA tthhiinn ppoolliisshheedd ppaallooddeenntt--ttyyppee bbaanndd aanndd aa tteennssiioonn rriinngg pprroodduuccee aa ttiigghhtt aannaattoommiicc ccoonnttaacctt ffoorr ccoommppoossiittee rreessiinn mmaatteerriiaallss ffoorr ccllaassss IIII rreessttoorraattiioonnss..
  • 30. TThhaannkk yyoouu ffoorr aatttteennttiioonn!!