Metal ceramic crowns

Metal ceramic crowns 2017-05-10T20:23:57+03:00

Metal ceramic crowns or porcelain-fussed-to-metal crowns, are made of a metal frame consisting mainly of chromium (Cr), and cobalt (Co) and covered with a special ceramic material (porcelain)

In older days, the composition of the metal were used nickel (Ni) instead of cobalt, but the usage was abandoned due to allergic reactions

Thus, these alloys are characterized chromium-cobaltium while in the composition contained a small amount of other metals such as molybdenum (Mo) which is indeed responsible for the discoloration (graying) of the crown after years passing by, iron (Fe), carbon (C), magnesium (Mg), and others

Advantages :

• They can be used for big fixed prosthetic restorations or supports of removable prosthetic
• Good durability at the time
• Resistance to vibration
• Does not demand big tooth preparation in relation with all ceramic crown
• Does not absorb stains

Metal ceramic crowns contraindicated :

• When the patient desires perfect aesthetics

Disadvantages :

• High cost
• After a while, some time, because of the age or traumatic brushing, seems cervical the metallic frame and the patient complaints that the teeth is «grey».
• Needs a special handling for perfect fit

The procedure is the following :

1st

1st visit :

• Color measurement with SpectroShade™ Micro
• Taking initial dental impressions with trays and impression materials for preparing the temporary crown

2nd

2nd visit :

• Local anesthesia
• Reduction of the volume of the tooth –tooth preparation
• Temporary crown placed

3nd

3nd visit :

• Removal of the temporary crown
• Final preparation of the tooth
• Taking final dental impressions
• Temporary crown replaced

4nd

4nd visit :

• Removal of the temporary crown
• Probing the metal base of the dental crown
• Temporary crown replaced

5th

5th visit :

• Removal of the temporary crown
• Probing of the dental crown with porcelain which is not finally polished
• Temporary crown replaced

6th

6th visit :

• Removal of the temporary crown
• Permanent cementation of the dental metal ceramic crown

Video process

Cases with Metal ceramic crowns