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In dentistry, an abutment is a connecting element. [1] This is used in the context of a fixed bridge (the "abutment teeth" referring to the teeth supporting the bridge), partial removable dentures (the "abutment teeth" referring to the teeth supporting the partial) and in implants (used to attach a crown, bridge, or removable denture to the dental implant fixture).
After an implant is placed the internal components are covered with either a healing abutment, or a cover screw. A healing abutment passes through the mucosa, and the surrounding mucosa is adapted around it. A cover screw is flush with the surface of the dental implant, and is designed to be completely covered by mucosa.
In implant dentistry, the implant-abutment junction (IAJ) refers to the location of intimate contact between a dental implant and its restorative abutment.. The IAJ is a focus of much attention because its morphology and location tend to affect the amount of bone resorption during the initial period of crestal bone changes immediately following implant placement.
This is to increase functional stability as well as improving aesthetics for the long-term basis. However, they are often placed only after successful achievement of occlusal stability. Loose teeth are crowned and fused or joined together [36] Examples of such technique are the pin ledge type of abutment, and the clasped supported partial denture.
A multi-unit abutment (MUA) is an abutment most commonly used with dental implants in "All-on-Four" protocols. [1] [2] They are designed for screw-retained group restorations, [3] which are often used in combination with angled dental implants [4] and whole arch replacements, as well as screw fixation of bridges made of zirconium or metal-ceramic group restorations to the implant.
A radiograph two years after implant placement, then seven years later in a heavy smoker, demonstrating progression of bone loss due to peri-implantitis Peri-implantitis is a destructive inflammatory process affecting the soft and hard tissues surrounding dental implants . [ 1 ]
In a single stage procedure, the fixture and abutment are placed simultaneously. For children or patients who may damage the abutment prior to osseointegration of the fixture, a two stage procedure may be performed in which the fixture is placed first, and after osseointegration roughly 6 months later, the abutment is attached. In children, a ...
Most of the time, the crown of the abutment teeth has to be removed to allow space for placement of overdenture without interfering the bite. Therefore, the pulp has to be removed. If the root canals of the abutment teeth are obliterated, endodontic treatment is not required. Teeth with non-negotiable root canals should not be selected as ...