When a tooth becomes so weak that the cusps (pointed parts on your back teeth) may fracture, a crown is recommended. This acts as a “bomb shelter” for the tooth and helps to give strength to prevent the tooth from breaking by encapsulating and protecting the entire tooth.
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There are two main types of tooth-coloured crowns; the metal-ceramic crown and the all-ceramic crown. The difference is in the sub-structure. One has a metal sub-structure and the other a pressed ceramic or zerconia sub-structure. If you are looking for aesthetics, strength and longevity the all-ceramic crown is for you. Although the metal-ceramic crowns are strong, they can often leave a dark line around the gum margin and this can look aesthetically displeasing. Porcelain crowns can be used to lighten teeth, narrow the gap or fix teeth that stick out plus other types of treatments.
The advantage of using pure porcelain is that the crowns are near identical in color to the existing colors of the patient’s teeth. The procedure will include the dentist shaving a thin layer off the teeth. A mould is taken of the patients teeth and the dentist will match the colour of the crown to the colour of the patients existing tooth and will ask the lab to create a crown that matches the colour and shape. The crown is then bonded to the damaged tooth. Crowns are very popular because their track record is proven to work in countries around the world. Porcelain is strong enough even for use on hard working molar teeth.