August 25, 2016

Porcelain Crowns Ealing London

Building a More Confident You

Crowns have been used in dentistry since the 1920’s although materials have changed significantly since then. Originally, crowns were made from gold but in the 1950’s it became possible to overlay gold with porcelain

Crowns (or caps) are where the whole tooth is completely covered, as compared to a veneer where only the front surface is covered. Crowns have been used in dentistry since the 1920’s although materials have changed significantly since then. Originally, crowns were made from gold but in the 1950’s it became possible to overlay gold with porcelain and so tooth coloured crowns were made with a gold base. Most crowns have been made this way over the last few decades.

What are crowns used for?

Crowns have a variety of uses from restoring badly damaged or broken teeth, heavily filled teeth, re-shaping teeth and strengthening root canal filled teeth. The patient below had all of his upper teeth heavily filled, some teeth had two or more separate fillings in them. To strengthen them and prevent teeth from breaking, improve the appearance and eliminate the need for more fillings, all ceramic crowns were used.

Same Day Dental Implant Treatment

What are the treatments used in a smile makeover?

A whole smile makeover is great, we build you a brand new WOW Smile. Sometimes we use more than dental implants, veneers and orthodontic treatments. Below is an out line of other treatments that your WOW dentist may use to create you that brand new beautiful smile.

Different Types of Crowns

There are a variety of materials that crowns can be made from. Gold has in the past been the ‘gold standard’ for dental crowns. Often for back teeth the whole crown would be made from a gold alloy, either white or yellow. Gold has been an excellent material for crowning teeth with as it doesn’t corrode, is strong, lasts years and years and can be made to fit very accurately. The disadvantage is in the aesthetics – it looks like a gold or silver coloured tooth.

Modern dental materials are based on ceramics and there are a variety of ceramic materials available for making crowns.

Porcelain over gold.

This is where dental porcelain is fused over a gold alloy or other metal cap, called a Porcelain Fused to Metal (PFM) crown. This is to combine the strength of the metal with the better appearance of porcelain. These crowns can be made for back or front teeth and are probably the most commonly used type of dental crown.

Ceramic Crowns.

Over the last decade or so stronger ceramic materials have been developed so that crowns can now be made entirely of ceramic, even for back teeth where the bite is stronger. There are a variety of different materials to make ceramic crowns and some laboratories have also named their own type of crown. The most common ceramic crowns are:-

  • Feldspathic – such as Vita Block MkII as used in the CEREC system and the most widely used ceramic for laboratory made crowns.
  • Empress – a leucite glass material developed by Ivoclar Vivadent used by laboratories and in the CEREC system.
  • e.Max – a high strength lithium di-silicate material also produced and developed by Ivoclar
  • Vivadent.- Used by laboratories (e.Max Press) and with the CEREC system (e.Max CAD)
  • Zirconia – these are layered crowns, a high strength ceramic called Zirconia is overlaid with dental porcelain.
  • Lava – a Zirconia overlaid with porcelain crown made by 3M. The Zirconia is milled from a ceramic block so only a few specialist labs can make these.
  • Procera – another layered crown, this time from Nobel Biocare. As with Zirconia or Lava, a strong ceramic cap is made and overlaid with porcelain.

The advantages of ceramic crowns over the more traditional PFM is there is no metal required to make the crown. Some people are allergic to certain metals, eg. Nickel, which may be used in the metal alloy. Also, there can sometimes be a thin dark line visible where PFM crowns meet the gumline which is unaesthetic. In the photo below the dark line where the metal and porcelain join is clearly visible whereas there is no join visible with the ceramic crown (Vita MkII Feldspathic made using CEREC CAD/CAM).

Which crown is best for me?

This will depend on your own situation and your Wow Smile dentist should be able to guide you through any options

How long will a crown last?

Correctly fabricated crowns can easily last 10-15 years. Indeed, many patients have crowns that are many, many years older.

Tooth Whitening

This has to be the best cosmetic dental treatment available. A lighter and brighter smile without needing dentistry!

How is it done?

The very best and most predictable results are achieved using a combination of in surgery ‘Power Whitening’ and at home ‘Tray Whitening’

Power Whitening is carried out in the dental practice. An advanced laser whitening gel is carefully applied to the teeth and this is then activated by laser light. Examples of this are Zoom, Enlighten and Quickwhite.

How long will it last?

The whitening treatment carried out as above is permanent. Teeth darken due to food colours in tea, coffee, red wine, curry etc., and gradually over a period of many years, these can start to darken teeth. To maintain the new whiteness, good hygiene with a whitening toothpaste and maybe wearing the night trays once or twice a year should be all it takes to maintain the whiteness of your teeth.

Gum Contouring

Not everyone shows their gums when they smile, but if they do then having an even gumline along the top of the teeth is important for a natural smile. Gum contouring, or gum sculpting as it is sometimes called, is a technique to reshape the gumline to give an even and balanced appearance.

In the example below, the patient had a very gummy smile and the gums sloped towards her left side giving a poor appearance. The gums were reshaped and a week later ceramic crowns were made. Notice the gumline is now in line with the shape of the top lip which gives a balanced and attractive smile.

In this example, the patient had a second incisor tooth which was dark and slightly sticking out. Also, the gum line was lower than the teeth either side. The gum was simply reshaped with a laser and a ceramic veneer made to change the shape, angle and colour of her tooth.

How is it done?

The best way to reshape gum is with a Dental Laser. The laser can be used to reshape the gum as if it was simply melting the gum into the correct shape, without any bleeding. The type of laser needed to do this is a Diode or Soft Tissue laser. Another advantage of laser gum contouring compared to simply cutting the gum is much quicker healing after and a more predictable gum line.

In some cases if a lot of reshaping is required it may be necessary to remove some bone under the gum as well as reshaping the gum. This is more involved, although, by using a special Hard Tissue Laser the surgery is much simpler than conventional surgery.

Cosmetic Bonding

Bonding is where a composite resin material is bonded (ie dentally glued) to the tooth. Composite resins are tooth coloured resins which can be used to repair chips in teeth, close small gaps, alter the shape of teeth or cover over marks and discolourations.

The composite resin chosen was colour matched to the patients teeth and directly applied to the teeth. The advantages of this treatment is that it is quick to do.

Composite bonding can also be combined with other treatments such as tooth whitening.

How long will it last?

Typically, 3-5 years. Composite resin is not as strong or durable as ceramic but it is easy to replace should any bonding composite wear or chip.

Another example where composite bonding was used to repair the biting edges of the upper front teeth following a professional whitening treatment. Cosmetic Bonding requires quite a lot of ‘artistic skill’ on behalf of the dentist and not all dentists carry out cosmetic bonding.


Smile Design

Our Wow smile makeover treatment is will create you a brand new beautiful, functional smile top to bottom.

Procedures Used For Smile Makeover

  • Implants
  • Veneers
  • Orthodontics
  • Crowns
  • Teeth Whitening
  • Gum Contouring
  • Cosmetic Bonding

What ever reasons require you to be in need of a smile makeover one of our highly trained cosmetic dentists will talk through a personal treatment plan with you.

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Composite Bonding Gallery

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