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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).
Regardless of the abutment material or technique, an impression of the abutment is then taken and a crown secured to the abutment with dental cement. Another variation on abutment/crown model is when the crown and abutment are one piece and the lag-screw traverses both to secure the one-piece structure to the internal thread on the implant.
One of the earliest successful implants was the Greenfield implant system of 1913 (also known as the Greenfield crib or basket). [14] Greenfield's implant, an iridioplatinum implant attached to a gold crown, showed evidence of osseointegration and lasted for a number of years. [ 14 ]
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".
The number of abutments required depends on both the position of the tooth to be replaced and the length of the span. Cantilever designs utilising one abutment is the design of choice for replacing a single tooth anteriorly and can also be used posteriorly. [3] Occlusion of the pontic with the opposing tooth should be assessed.
A removable partial denture (RPD) is a denture for a partially edentulous patient who desires to have replacement teeth for functional or aesthetic reasons and who cannot have a bridge (a fixed partial denture) for any reason, such as a lack of required teeth to serve as support for a bridge (i.e. distal abutments) or financial limitations.
One Piece (stylized in all caps) is a Japanese anime television series produced by Toei Animation that premiered on Fuji Television in October 1999. It is based on Eiichiro Oda 's manga series of the same name .
One Piece [a] (stylized in all caps) is a fantasy adventure television series developed by Matt Owens and Steven Maeda for Netflix. The series is a live-action adaptation of the manga series of the same name by Eiichiro Oda, who serves as creative consultant for the show. It is produced by Kaji Productions and Shueisha, who also publishes the ...