Tuesday 24 May 2011

Inlays and Onlays


Introduction to Inlays and onlays

A dental inlay is a very like a filling, with the difference that it rests within the bumps on the tooth chewing surface.  A dental onlay can cover several cusps or bumps, and are larger than inlays.
Inlays or onlays are smaller than crowns, but bigger than fillings. These are made of composite resin, ceramics or gold, and can be bonded into place. They are long lasting, and  their lifespan depends on usual variable The teeth that need treatment, Materials used ,chewing pressure where located and of course the patient’s oral hygiene habits
Dental inlays or onlays are used in the restoration of  already decayed teeth.

Procedure

Our dentist will first numb the tooth, as well as the surrounding area using a local anesthetic. Patients may also receive other types of sedation, like nitrous oxide.
Our dentist uses two types of inlays - direct and indirect.
Direct inlays and onlays can be placed in a single visit, and are produced in the dentist's clinic.
Indirect inlays and onlays take up to two visits for placement, and these are made in a dental laboratory.
Our dentist will use one of these two types depending on the appearance of the inlays or onlays, as well as the amount of tooth that is left undamaged.
Direct inlays and onlays 

In this case the decay is removed, and tooth is shaped. Our dentist will then place composite resin that is molded to fit the tooth. He will then remove the inlay, and use a special oven to harden it. The hardened inlay will be cemented onto the tooth. After that, the inlay is polished and shaped by the dentist. Modern technology allows dentists to make ceramic inlays or onlays right in the clinic, with placement finished in a single visit
Indirect inlays and onlays

Again the decay will be removed, and then an impression will be made of the tooth to be treated, as well as the surrounding teeth.  Your dentist will place a temporary filling on the tooth, and will send the impression to the laboratory, where the inlay or onlay will be made.
When you visit the dentist's office for the second time, the temporary filling will be removed, and the teeth will be cleaned.  The inlay or onlay will be cemented to the tooth, and then polished. After this, the inlay or onlay may be reshaped to adjust to fit your teeth

Follow up
There is no special care required with your inlay or onlay.
Remember to brush and floss daily, and schedule a visit to a dentist regularly
Risks
There is a small risk that the inlay or onlay can loosen. This happens when the cement gets washed away, or saliva gets mixed up with it during application.
In case of inlays or onlays that are made of porcelain or composite resin, cracks can develop.
Once you receive an inlay or onlay, check the sensitivity of the teeth, and  if sensitivity persists contact us. Also, visit your dentist if the inlay or onlay loosens or falls out of the tooth which is rare but does happen.

Sunday 15 May 2011

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What are Crowns ?


Crowns are used to repair badly decayed, broken or severely discolored teeth or teeth that are not properly aligned. A crown is an artificial covering for the tooth and can be made out of several different types of material. A crown can be porcelain, acrylic, gold or a combination of metal and porcelain or gold and porcelain. Where in the mouth the cap is being placed will determine the type of material used.
Crowns look and are shaped just like regular teeth and no one but you and your dentist will know which tooth is yours and which one is the crown or cap. The tooth under the crown is reduced in size, over which the crown will be permanently cemented. While the permanent crown is being fabricated your dentist can give you a temporary one to wear. 


Crowns have a much longer life span than bonding solutions onto the tooth,  they resist stains retain their color and resist chipping and cracking even better than a natural tooth. Crowns do take longer to prepare than bonding and are not reversible. Our dentists can recommend which type of restoration is best for your particular situation.



Tuesday 10 May 2011

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Dentures

Initial Consultation

During the first dental visit to evaluate the need for dentures, our dentist will examine your gums and supporting bone structure to identify the appropriate treatment plan.
In some cases, oral surgery is performed to correct bony ridges that may interfere with the stability of the denture. In other cases, the remaining teeth may need to be extracted before dentures can be placed.
 Once your dentist has decided that dentures are right for you, he will make an impression of the gums to identify every ridge and crevice to ensure the best denture fit possible.

In cases where teeth need to be removed, an immediate denture is typically placed to enable proper healing of the extraction sites and serve as an esthetic replacement for natural teeth. The immediate dentures can be easily modified for changing ridge contours during healing until final dentures can be made. In constructing the immediate dentures, our dentists will use a shade and mold chart to choose replacement teeth that will most closely match your natural teeth, minimizing any changes in appearance and maximizing a natural smile.

The Final Dentures

Complete dentures are made when gums are restored to a healthy condition and sufficient time has passed for complete healing. Total dentures replace all teeth in the upper or lower jaws of the mouth. Gums will naturally shrink through the healing process of tooth loss, which normally takes from six to 12 months. During this period the immediate dentures may require adjustments to adjust too the changes in the gums and underlying bone structure. This could include soft and hard relining procedures made to the immediate denture.


An over denture is a removable dental prosthesis that covers and rests on one or more remaining tooth roots. A removable partial denture is a dental prosthesis that replaces some teeth and is built around existing natural teeth. Both the over denture and the removable partial denture may be connected to the remaining tooth roots or remaining natural teeth with anchors made of metal or plastic. These connections improve stability and the retention of both prostheses.

Complete dentures, over dentures, and removable partial dentures should be removed at night while you sleep. This enables the gums to be bathed by saliva, which has important properties for controlling the naturally occurring flora found in the oral cavity. Saliva aids in maintaining a healthy mouth. 

Tuesday 3 May 2011

Dental Crowns and Tooth Bridges



What are Dental Crowns and Tooth Bridges?

Both crowns and most bridges are fixed prosthetic devices. Unlike removable devices such as dentures, which you can take out and clean daily, crowns and bridges are cemented onto existing teeth or implants, and can only be removed by a dentist.
How do Crowns Work?
A crown is used to entirely cover or "cap" a damaged tooth. Besides strengthening a damaged tooth, a crown can be used to improve its appearance, shape or alignment. A crown can also be placed on top of an implant to provide a tooth-like shape and structure for function. Porcelain or ceramic crowns can be matched to the color of your natural teeth. Other materials include gold and metal alloys, acrylic and ceramic. These alloys are generally stronger than porcelain and may be recommended for back teeth. Porcelain bonded to a metal shell is often used because it is both strong and attractive.
Your dentist may recommend a crown to:
  • Replace a large filling when there isn't enough tooth remaining
  • Protect a weak tooth from fracturing
  • Restore a fractured tooth
  • Attach a bridge
  • Cover a dental implant
  • Cover a discolored or poorly shaped tooth
  • Cover a tooth that has had root canal treatment
How do Bridges Work?

A bridge may be recommended if you're missing one or more teeth. Gaps left by missing teeth eventually cause the remaining teeth to rotate or shift into the empty spaces, resulting in a bad bite. The imbalance caused by missing teeth can also lead to gum disease and temporomandibular joint (TMJ) disorders.
Bridges are commonly used to replace one or more missing teeth. They span the space where the teeth are missing. Bridges are cemented to the natural teeth or implants surrounding the empty space. These teeth, called abutments, serve as anchors for the bridge. A replacement tooth, called a pontic, is attached to the crowns that cover the abutments. As with crowns, you have a choice of materials for bridges. Your dentist can help you decide which to use, based on the location of the missing tooth (or teeth), its function, aesthetic considerations and cost. Porcelain or ceramic bridges can be matched to the color of your natural teeth.
How are Crowns and Bridges Made?
Before either a crown or a bridge can be made, the tooth (or teeth) must be reduced in size so that the crown or bridge will fit over it properly. After reducing the tooth/teeth, your dentist will take an impression to provide an exact mold for the crown or bridge. If porcelain is to be used, your dentist will determine the correct shade for the crown or bridge to match the color of your existing teeth.
Using this impression, a dental lab then makes your crown or bridge, in the material your dentist specifies. A temporary crown or bridge will be put in place to cover the prepared tooth while the permanent crown or bridge is being made. When the permanent crown or bridge is ready, the temporary crown or bridge is removed, and the new crown or bridge is cemented over your prepared tooth or teeth.
How Long do Crowns and Bridges Last?
While crowns and bridges can last a lifetime, they do sometimes come loose or fall out. The most important step you can take to ensure the longevity of your crown or bridge is to practice good oral hygiene. A bridge can lose its support if the teeth or bone holding it in place are damaged by dental disease. Keep your gums and teeth healthy by Brushing with fluoride toothpaste twice a day and flossing daily. Also see your dentist and hygienist regularly for checkups and professional cleanings.
To prevent damage to your new crown or bridge, avoid chewing hard foods, ice or other hard objects.
Crowns
PorcelainGold
Full porcelain fused to metal.Full cast gold crown.
Bridges
SpaceBridgeCemented
Teeth around the space are prepared.The bridge is mounted and adjusted for fit and comfort.The bridge is cemented into position.

Sunday 1 May 2011

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