The most preferable crown restoration for anteriors due to their esthetic enhancements..

1. BY:
Hrudi Sundar Sahoo
Meenakshi Ammal Dental college,
Chennai

2.  Introduction
 Constituents
 Classification
 Advancements in Ceramic Dentistry
 In-Ceram
 Tooth preparation
 Laboratory processing
 Cementation and finishing

3.  Non-crystalline glasses composed of
structural units of silicon and
oxygen (SiO4 tetrahedra).
 Most esthetic fixed restorations.
 Highly desirable esthetic properties.

4.  Major components: Feldspar, Quartz,
Kaolin
 Other components: Oxides of sodium,
Potassium, Calcium, Aluminium,
Magnesium, Lithium etc.
 For colours: Oxides of Indium,
Chromium, Tin, Iron, Cobalt, Cerium.

5.  Based on firing temperature:
 1. High-fusing: 1,290 to 1,370°C (2,350 to
2.500T)
 2. Medium-fusing: 1,090 to 1,260cC (2,000
to 2.300T )
 3. Low-fusing: 870 to 1,065DC (1,600 to
1,950°F)

7.  All ceramic crown- PJC by Land [1886]
 PJC with inner core of aluminous porcelain
 Twin Foil Technique
 Castable glass ceramics
 Shrink Free Ceramic crown
 IPS Empress
 In-Ceram

9.  Introduced by Sadoun (1985)
 Core material is alumina
 Manufactured by Slip casting, sintering, Glass
absorption.
 Conventional porcelain applied to the core to
give final contour and colour.
 Greater compressive strength than IPS Empress
but lesser than Metal ceramic.
 Recommended for short span three unit
anterior FPD.

15.  Ceramic crowns may be cemented with
zinc phosphate, glass ionomer. or a dual-
polymerizing resin cement such as
Enforce with Fluoride.
 Ceramic crowns that have been etched
internally and bonded with a composite
resin cement are 50% stronger than
similar crowns cemented with zinc
phosphate cement.

16. THANK YOU!!!