| Points
of Comparison |
IPS
Empress
& Empress2 |
Procera |
Targis
Vectris |
Captek |
Ideal Applications |
When anterior esthetics is the
primary
restorative objective. |
Esthetically masks dark, underlying
tooth structure including metal posts and tetracycline
stains. |
Only metal-free restorative option
for inlay bridges and Maryland bridges. |
Situations where less than 1.0
mm facial reduction
can be acheived.
|
Primary Indications
|
Empress:veneers, single posterior
crowns, inlays, onlays
Empress2: anterior single crowns and
2nd bicuspid formward 3-unit bridges. |
single crowns |
Maryland bridges, inlay bridges,
single crowns, 3 unit bridges,
inlays and onlays |
single crowns and bridges with
up to
2 pontic spans |
Primary
Contra-indications |
posterior bridges |
bridges, veneers, inlays and onlays |
4 + unit bridges; veneers;
where a clean bonding field is compromised |
inlays, onlays and veneers |
Preperation Requirements |
chamfer margin design
1.0 mm min. at margin
1.5 to 2.0 mm reduction incisal, facial &
lingual |
chamfer margin design
1.0 mm min. at margin
1.5 to 2.0 mm reduction incisal, facial &
lingual |
chamfer margin design
1.0 mm min. at margin
1.5 to 2.0 mm reduction incisal, facial &
lingual |
any margin design
.6 mm min. at
margin
1.0 to 1.5 mm reduction incisal, facial &
lingual |
Cementation Guidelines |
Empress: adhesive Bonding with
dual cure bonding agent.
Empress2: adhesive bonding or cementation with
ProTec CEM |
standard cementation with any cement,
including zinc phospate (please avoid resin-filled
glass ionomers) |
adhesive bonding system with
dual-cure bonding agent |
standard
cementation with any cement including zinc phosphate. |
Flexural Strength |
Empress: > 700MPa after bonding
Empress2: 350-400 MPa prior to cementation |
687MPa |
>1000 MPa with Vectris
substructure and bonding |
>1000 MPa |
Wear
Characteristics |
comparable to natural enamel |
comparable to natural enamel |
comparable to natural enamel |
comparable to natural enamel |
Years of Clinical Success |
Empress: 10 years
Empress2: 2 years |
5 years |
5 years |
8 years |
Restoration Composition |
Empress: leucite-reinforced core
Empress2: lithium disilicate core |
aluminous oxide core with
layered porcelain |
fiber-reinforced substructure with
composite overlay |
88 % Au (22k) coping with layerd
porcelain |
System
Developer |
Ivoclar NA |
Nobel Biocare |
Ivoclar NA |
Precious
Chemicals, Inc |
Planned Future Developments |
continued testing to strenghten
and to enhance esthetics |
3 unit bridges and veneers during
1999 |
5 unit bridges available during
1999 |
continued testing on bacteriostatic
effects |
In-Lab
Turnaround
Time |
10 Days |
10 Days |
10 Days |
10 Days |
| Points
of Comparison |
IPS
Empress
& Empress2 |
Procera |
Targis
Vectris |
Captek |
