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The first Nickel titanium (NiTi) orthodontic alloy, introduced by Andraeson. This alloy was based on the research done by Buehler. Since their introduction, the wires made out of Niti alloys have become an important part of orthodontic treatment. The composition of the wire has 55% Nickel and 45% Titanium.
Charles J. Burstone (April 4, 1928 – February 11, 2015) was an American orthodontist who was notable for his contributions to biomechanics and force-systems in the field of orthodontics.
In the Anterior-Posterior dimension, appliances such as Class II and Class III are used. Appliances used in transverse dimension are utilized to expand either the maxillary or the mandibular arch. Appliances used in the vertical dimension are used to correct open or deep bite. [3] [4]
Nickel titanium, also known as nitinol, is a metal alloy of nickel and titanium, where the two elements are present in roughly equal atomic percentages. Different alloys are named according to the weight percentage of nickel; e.g., nitinol 55 and nitinol 60 .
Modern orthodontics makes frequent use of nickel-titanium archwires and temperature-sensitive materials. When cold, the archwire is limp and flexible, easily threaded between brackets of any configuration. Once heated to body temperature, the arch wire will stiffen and seek to retain its shape, creating constant light force on the teeth.
A separate continuous intrusion arch is used which was inserted in the auxiliary tube of molars on one end and tied to the anterior segment on the other end. The molars served as an anchorage for the intrusion arch while the pure intrusion was achieved via downward force on the anterior segment where the intrusion arch was engaged. Dr.
These appliances can be used to achieve expansion in the maxillary arch; there are devices for mandibular expansion or lower expansion too. In past many years, different types of appliances have been made. These types are: tissue-borne, tooth-borne, slow maxillary expansion, rapid maxillary expansion, and bone-anchored.
A quad helix (or quadhelix) is an orthodontic appliance for the upper teeth that is cemented in the mouth.It is attached to the molars by 2 bands and has two or four active helix springs that widen the arch of the mouth to make room for crowded teeth, or correct a posterior cross-bite, where lower teeth are buccal (outer) than upper teeth. [1]