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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.
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 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.
With the former methods, it takes one or two days to fabricate an implant. A root analogue implant can be fabricated from zirconium dioxide (zirconia) or titanium. [9] Successful titanium RAIs have been three-dimensionally printed as porous one-piece implants, using CAD software. [10]
Two piece implant, a form of Abutment (dentistry), a connecting element; Two-piece lapping, a version of the machining process Lapping; Two-piece sobralia (Sobralia dichotoma), an orchid found in South America; Two-piece suit, a set of garments made from the same cloth; see Suit (clothing) Two-piece tmRNAs, a type of Transfer-messenger RNA; Music
Overdenture is any removable dental prosthesis that covers and rests on one or more remaining natural teeth, the roots of natural teeth, and/or dental implants. [1] It is one of the most practical measures used in preventive dentistry. Overdentures can be either tooth supported (conventional / immediate) or implant supported.