During this century associations were created, journals started and the first Nylon bristle tooth brush invented. Stainless Steel was to be accepted for use in the mouth, thus reducing the cost of some previous treatments that relied on Gold and Silver.
Another revolution was started in the 1970’s when advances in adhesives allowed new brackets to be designed and be directly bonded to the teeth, eliminating greatly the use of bands and therefore reducing the “metal grin” effect.
In 1972 the original Straight-Wire Appliance (SWA) became available and Andrews became known for the preadjusted bracket system. Roth helped with modifications and these were regarded as the next generation of preadjusted brackets.
Between 75 and 93 Mclaughlin and Bennet spent the best part of 15 years refining treatment mechanics, including sliding mechanics and the continuous use of light forces for labial orthodontics.
It is also in this period that two Dr’s almost simultaneously started experimenting with Lingual Orthodontics…placing the brackets on the inside of the mouth! Dr Craven Kurz was pushed this way by a very demanding Play boy model who, wanted to improve her smile but did not want to see any brackets. Dr Kinya Fujita of Japan had started doing “Invisible Braces” or rather the more discreet “Lingual Braces” and Ormco quickly mobilized a task force for the improvement of the technique and the manufacture of special brackets. A series of brackets were developed and patents made in 76. Ormco started to manufacture in 79. The Kurz generation brackets were developed from Generation 1 in ‘76 through to Gen 7 at the present, with important stages at gen 4 introducing the bite plane which reduced bonding failures through the re-distribution of the bite forces.
Competition was stiff as the Lingual technique was difficult to master and a new clear stain free labial bracket was launched called the ‘Starfire’
The lingual sector fought back and the French Association was founded in 1986, followed by the ALOA in 87 and ESLO in 1992. Smaller classes concentrated on the clinical side…but what happened with regards to the lab techniques?
Next u |