Multi-unit abutment

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.[5][6][7][8]

Medical uses

Multi-unit abutments are used to align the prosthesis on a level restorative platform, adjust for variations in implant heights, and place the implant connection at the same level as or just below the gingival surface.

Terminology
Abutment (dentistry)
a supporting element fixed in the implant,[9] a prosthesis is directly attached to the abutment: a crown, multiple restoration or a splinted restoration of a complete dentition.
Multi-unit abutment
A multi-unit abutment is a type of abutment that allows for the connection of multiple implant fixtures to a single prosthesis. They can be angled or straight, and come in various sizes and shapes to fit different implant systems and clinical situations.[10]

References
  1. Resnik, Randolph (January 25, 2020). Misch's contemporary implant dentistry (4th ed.). Elsevier Health Sciences. p. 879. ISBN 9780323478267.
  2. Byrne, Gerard (June 3, 2014). Fundamentals of Implant Dentistry. Wiley. p. 168. ISBN 9781118274965.
  3. Drago, Carl (February 19, 2020). Implant Restorations. Wiley. p. 358. ISBN 9781119538158.
  4. K. Ho, Christopher C., ed. (October 5, 2021). Practical Procedures in Implant Dentistry. Wiley. p. 247. ISBN 9781119399186.
  5. Nazarian, Dr Ara (2022-02-18). "Predictable immediate guided implant placement and provisionalisation". Dental Tribune International. Retrieved 2023-03-14.
  6. "Zygoma implant multi-unit abutment: solve this puzzle?". OsseoNews. 2018-08-31. Retrieved 2023-04-04.
  7. "What are Multi-Unit Abutments? - Chicago Dental Implants". Teeth Chicago Dental Implants. 2020-05-23. Retrieved 2023-04-04.
  8. Yurij, Curatorial (2022-12-15). "Titanium. What Alloys Tooth Implants Are Made Of". uniqa.dental. Retrieved 2023-04-12.
  9. "Glossary of Implant Dentistry" (PDF). International Congress of Oral Implantologists. Retrieved 29 April 2023.
  10. Wu, Yu-Ling; Wu, Aaron Yu-Jen (2017-04-21). "A method of fabricating an accurate repositioning device for relocating multiple multiunit abutments". The Journal of Prosthetic Dentistry. 118 (4): 564–566. doi:10.1016/j.prosdent.2017.01.009. ISSN 0022-3913. PMID 28434683.
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