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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.
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. After an integration ...
This dental radiograph displays two identical 5.0 mm diameter Biomet 3i tapered dental implants placed into the lower right mandible. The healing abutment on the more posterior implant [left] is platform matched (it shares the same 5.0 mm diameter as the implant platform), while the healing abutment on the more anterior implant [right] is platform switched (it possesses a 4.1 mm diameter).
The healing abutment on the more posterior implant [left] is platform matched (it shares the same 5.0 mm diameter as the implant platform), while the healing abutment on the more anterior implant [right] is platform switched (it possesses a 4.1 mm diameter). Because the implant to the right is platform switched, its IAJ is more distinct.
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).
Technique depicted in 3D video This image shows how Nobel Biocare's All-on-4 solution works. The term All-on-4, also known as All-on-Four [1] and All-in-Four, [2] refers to 'all' teeth being supported 'on four' dental implants, a prosthodontics procedure [3] [4] for total rehabilitation of the edentulous (toothless) patient, or for patients with badly broken down teeth, decayed teeth, or ...
Implants retrieved after 18 years show evidence of lamellar bone consisting of multiple layers and multiple osteonic structures. [40] [41] Depending on the surgical procedure, implant size, implant coating, and patient, the long-term survival rate for Bicon dental implants ranges from 92.2% to 100%. [27] [40] [41] [42] [43]
The teeth used to support the bridge are called abutments. A bridge may also refer to a single-piece multiple-unit fixed partial denture (numerous single-unit crowns either cast or fused together). The part of the bridge which replaces a missing tooth and attaches to the abutments is known as a "pontic".