fixed prosthesis ( crown & bridge )
Both crowns and most bridges are fixed prosthetic devices. Unlike removable devices such as dentures, crowns and bridges are cemented onto existing teeth or implants, and can only be removed by a dentist.
A crown is used to entirely cover or "cap" a damaged tooth , 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 color of natural teeth . 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 Types of crowns :
• porcelain fused to metal crowns .
• metal free porcelain crown
• zirconium crowns
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. Bridges are cemented to the natural teeth or implants near to 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.