preparation guide: anterior remier - premier dental … · dental studios preparation guide:...
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d e n t a l s t u d i o sP r e p a r a t i o n G u i d e : a n t e r i o r premier
a l l - c e r a m i c
But t jo in t mar g in
Footba l l - shapedf in i sh ing bur
Rounded in ter na ll i ne ang les
But t jo in t mar g in1.0 -mm reduct ionat g ing i va l mar g in
1.5 -mm l ingua lcontac t c lear ance
1.5 -mm to 2 .0 -mminc i sa l reduct ion
1.0 -mmto 1.5 -mmfac ia l reduct ion
chamfer mar g in
1.0 -mm 1.5 -mmreduct ion a t
g ing i va l mar g in
1.0 -mm to 1.5 -mml ingua l contac t c lear ance
1.5 -mm to 2 .0 -mminc i sa l reduct ion
1.5 -mmto 2 .0 -mmfac ia l reduct ion
p o rc e l a i n f u s e d t o m e t a l
veneersfull - coverage crowns
Depth cut s o f0 .6 -mm to 0 .8 -mm
1.0-mm to 1 .5 -mminc i sa l reduct ion
contac t po in t
chamfer marg ins : Correct preparation of the chamfer margins interproximally al lows for adequate bulk of porcelain.
a “s l i ce” preparat ion : This technique enables the ceramist to close the space and avoid unnatural l ingual contour s.
i n terprox ima l extens ion : Using the same round-ended diamond bur, the interproximal preparation is extended from the gingival chamfer margin into the proximal space .
i nc i sa l preparat ion : The diamond is angled to el iminate undercuts and establish a butt joint on the l ingual aspect of the preparation. The incisal edge should be
rounded to el iminate sharp l ine angles.
un i form fac ia l preparat ion : A medium-gr it round-ended diamond is used to join the depth cut grooves to establish a uniform preparation and porcelain thickness of at least 1.0-mm.
* All internal l ine angles are rounded and smoothed *
1.0 -mm reduct ionat g ing i va l mar g in
But t jo in t mar g in
1.5 -mm ax ia lreduct ion
1.5 -mm to 2 .0 -mminc i sa l reduct ion
three - unit bridge
maryland bridge1.5 -mm l ingua l c lear ance
2 .0 -mm prox ima l box
Supr a-g ing i va lmar g ins
1.0 -mm to 1.5 -mmrounded shou lder reduct ion
d e n t a l s t u d i o sP r e p a r a t i o n G u i d e : p o s t e r i o r premier
a l l - c e r a m i c
1.5 -mmax ia l reduct ion
A f l a t -ended tapered d iamond buri s u t i l i zed to es tabl i sh a but t jo in t mar g in .
1.0 -mm to 1.5 -mmging iva l mar g in reduct ion
1.5 -mm to 2 .0 -mmocc lusa l reduct ion
p o rc e l a i n f u s e d t o m e t a l
f u l l c a s t
full - coverage crowns three - unit bridge
inlay/onlay bridgeonlay
inlay
rounded in ter na ll i ne ang les
fea ther-edge orchamfer mar g in
1.0 -mm bucca l andl ingua l reduct ion
1.0 -mm to 1.5 -mm occ lusa l reduct ion
Porce la injunc t ion
mar g in des i gn
No sharpcorners
Bucca l L ingua l
Meta lmar g in des i gn
orce la injunc t ion
mar g in des i gn
No sharpcorners
ucca l L ingua l
Mmar g in des i gn
2.0-mmocclusal reduction
1 .0 -mm to 1 .5 -mmwide g ing i va l f loor
Rounded in ter na ll i ne ang les
1 .5 -mm to 2 .0 -mm i s thmus w idth
1 .5 -mmdepth
at i s thmus
But t jo in t mar g in
1 .5 -mm to 2 .0 -mm i s thmus w idth
Rounded in ter na ll i ne ang les
But t jo in t mar g in
1 .0 -mm to 1 .5 -mmwide g ing i va l f loor
1 .0 -mm reduct ionat the g ing i va l mar g in
But t jo in t mar g in
1 .5 -mm to 2 .0 -mmocc lusa l reduct ion
1 .5 -mm ax ia l reduct ion
Premolar in l ay prepar a t ion( 1 .5 -mm depth )
Mola r on lay prepar a t ion( 2 .0 -mm cuspa l reduct ion )
Edentu lous space
2 .0 -mm cuspa l reduct ion