Why do teeth need crowning?

See answer: When the tooth is missing a lot of the crown part. A crown will help protect the weakened tooth.

Strength mostly: Most of the time a tooth will need a crown to add strength to the existing structure. If a tooth is broken down, has decay, is too weak for a filling, then the crown would be made. Crowns can be made to increase function if teeth are not the proper size and shape. Crowns can also be done for cosmetic reasons if the patient does not like the look of their own tooth.

Replace: Crowns replace lost tooth structure--rebuild the tooth--when repairing the tooth with a filling is not enough for strength and function.

Fracture wall potent: Barring the crowning or capping a tooth for a bridge, crowns are placed because a tooth wall has fractured or the amount of old filling and/of decay removal would leave remaining tooth structured undermined and subject to fracture. It is basically a structural issue.

Dental caps.: Teeth need caps to hold them together and protect them from breaking under the force of your bite. It is a structural matter. Your bite is about 400psi at the molars. Even greater when you are asleep. Teeth with large fillings are weakened. They can break. Caps or crowns cover the weak part and protect the rest. Best.

A few reasons : There are a few reasons for a crown. If the tooth is broken, cracked, has a very large filling or has had a root cancel. In all cases it is to hold the too together

Crowning a tooth: A tooth needs a crown because there is risk of fracture and tooth loss due to the brittleness that can occur with the placement of larger and larger restorations. When a tooth has had a root canal and lost its vitality (nerve and blood supply), it can become dark and/or sometimes fracture. Perhaps the tooth is discolored or mal-formed and bleaching/restorations are un-acceptable.

Need tooth structure: When more than half a tooth need to be restored due to fracture or decay or after root canal procedure. The tooth needs to be covered and protect by a crown.

Restore strength : Teeth need to be crowned when to much natural tooth structure is lost to decay or breakage. Root canal therapy will also weaken a tooth and so in most cases a crown is required. A crown fits precisely over a prepared tooth, is bonded or cemented on and can restore a tooth to not only it's natural shape and function, but strengthen it as well. Today's variety of materials make for amazing crowns!

Crowns!: Teeth need crowns for several reasons. First off a crown restoration is used to re-distribute the bitting forces and provide strength to the tooth. Teeth that need crowns are ones that do not have sufficient tooth structure to provide that support or the tooth has had a root canal where crowns are necessary to provide additional support.

Protection,function: Usually to protect the remaining tooth and keep it from cracking. Also, to restore size, shape ,function and esthetics. Usually recommended: after root canal treatment,for teeth with large fillings, severely broken-down or worn teeth, discolored teeth (especially front ones),and for bite correction/restoration. See your Prosthodontist for evaluation if you need more information for your situation.