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A mastoidectomy is a procedure performed to remove the mastoid air cells [1] near the middle ear. The procedure is part of the treatment for mastoiditis, chronic suppurative otitis media or cholesteatoma. [2] Additionally, it is sometimes performed as part of other procedures, such as cochlear implants, [3] or to access the middle ear.
In some parts of Italy the scutum had been used since pre-historical times. [6] Polybius gave a description of the early second-century scutum BC: [7] The Roman panoply consists firstly of a shield (scutum), the convex surface of which measures 2.5 ft (76 cm) in width and 4 ft (120 cm) in length, the thickness at the rim being a palm's breadth ...
The Scutum–Centaurus Arm, also known as Scutum-Crux arm, is a long, diffuse curving streamer of stars, gas and dust that spirals outward from the proximate end of the Milky Way's central bar. The Milky Way has been posited since the 1950s to have four spiral arms ; numerous studies contest or nuance this number. [ 1 ]
"Scuta" is the plural of the Latin word "scutum" and means "shield". It is used for the following: Scutum (shield), the Roman shield; Scute, a zootomical term; See also
The wax is built up or removed until the appropriate VDO has been established. The rims are then notched in order to allow an index of the relationship of the maxillary rim to the mandibular rim with an impressionable medium, such as Alluwax or Regisal.
Common techniques for removal of the excess tissue include traditional removal with a surgical scalpel, electrical scalpel, or laser excision with a laser scalpel, e.g. a carbon dioxide laser, erbium:YAG laser, Neodymium-YAG laser, or diode laser. [9] The poorly fitting denture can be adapted to fit better (a "reline") or a new denture constructed.
The scutum from Dura-Europos is the only surviving semi-cylindrical shield from Roman times. It is now in the Yale University Art Gallery (inventory number 1933.715). The shield was found in the excavation campaign of 1928/37 on Tower 19 of Dura-Europos (in present-day Syria). [ 1 ]
This fossil has the form of a rounded shield, enclosing strongly concentric corrugations or ribs, which weaken adjacent to a triangular neckline.