Edgewise appliance is Angle physician after years of study and try to launch in 1928, orthodontic devices. orthodontics wire This orthosis rectangular grooves care, early corrective arch wire are mostly rectangular, its main feature is able to control tooth movement in different directions. The early 1940s, Tweed in Angle's edgewise technique to be reformed on the basis of proposed Tweed edgewise technique. Edgewise orthodontic correction technology with the development of theory and clinical practice in depth, constantly changing and improving, and absorbed many advantages of other technologies, medical. Learning education network collected to make the technology has been refined and has been many countries to become widely used in clinical orthodontic fixed appliances, one of the United States, Japan and other countries orthodontic clinical utilization exceeds 95%. currently used Edgewise correction technique, although both use square brackets , but in the entire treatment process not only uses square arch wire and the use of round wire, especially at the beginning of treatment, so the correction technology includes filaments bow and edgewise principle, it can be called fine Edgewise silk bow correction technique, referred to as Edgewise correction technology. China in the early 1980s began to introduce the correction technology, then continue to promote development in the country, medical. orthodontics wire Learning education network collected and brought to the orthodontic equipment localization, enabling edgewise orthodontic become a major positive abnormal correction technology, widely carried out in the clinic.
Straight orthodontics wireImported by the United States 3M's correction system. MBT straight wire appliance sliding brackets compact, it is no longer a cumbersome, "braces", but beautiful "teeth ornaments" and thus subject to numerous orthodontic all ages. Invisible efficient, durable and beautiful; safe and effective treatment soft power, greatly reducing discomfort during treatment; treatment time is short; shorter than the conventional treatment for nearly 1/3. Many orthodontic hesitates for a large part of people worried about wearing after the braces will affect the appearance, in fact, for those who orthodontic MBT straight wire appliance in Medical Education | network collected on also have different choices. Ceramic brackets of orthodontic appliances have changed "iron" braces icy image, beautiful, like the teeth is a beautiful ornaments, no less practical value, making the device more concise oral and improve clinical results, do not need to make any curved arch wire, the more accurate treatment effect, thereby reducing the difficulty of patient cooperation.
MBT straight orthodontics wire technology Straight wire is the most important theoretical basis of the best natural six standard Andrews by dry all six criteria for full arch of teeth near the distal , buccal and lingual gingival angle and position to have clear expectations as a treatment goal, so that all non- fully programmed straight wire appliance needs more arch wire adjustments in order to achieve the best six criteria. RonaldRoth orthodontic functional theory advocates are also Andrews classic straight wire appliance 's first beneficiaries , after several years of experience in the use of straight wire , Roth pleasantly surprised to find the best natural Six straight for the target design Andrews wire appliance orthodontic functional criteria is to achieve the best tool . But Roth can not accept multiple sets of series brackets Andrews method , but hope to resolve most of a wrong type of bracket , so he and the "A" company, will produce Andrews bracket mold was modified draw a consistent with his treatment methods set straight wire appliance , dry 1976 officially launched , Roth Roth data Andrews called straight wire appliance , this appliance is featured in all of the teeth may need to move on the increase anti- tilt, torsion angle , emphasized correction, relatively close to the tooth Andrews bracket series, but Roth that Andrews sliding France consumes more overall mobile dental anchorage , so removed Andrews extraction series brackets traction on conventional arms , switch to dual-key eye bow (doublekeyholelooparch) adduction song France is off the main means of extraction space . Starting from the functional requirements of orthodontics wire , Roth also recommends using a uniform width round arch wire forms. Roth this system - a set of straight wire appliance and one kind of bow approach , meet and simple practical principles, greatly facilitated the straight wire appliance promotion , Roth data straight wire appliance has thus become the most widely used internationally straight wire appliance .
Light Cure resin production and Benefits Extraoral multidirectional illumination photosensitive resin cured indirect filling method is in the mouth without layering , chunky stuffing, forming, after the initial setting using extraoral Light Cure curing adhesive in the mouth and then fixed . From the clinical effect of this method compared with other repair method has obvious advantages : ① full play to the material properties , to overcome the mouth when the direct filling material is cured insufficiency and " level " many drawbacks ; ② in the appearance of color, adhesive properties, edge leakage and cytotoxicity better than amalgam ; ③ from the operation process and the price is better than inlays, shell crown production, can be completed one visit , reducing the number of patient referral and economic burden . Omo extraoral repair photosensitive resin curing deep caries , to overcome the drawbacks of other methods , advantages of a set , a kind of good repair methods. Long-term effect is yet to be seen. ( 1 ) curing speed , high production efficiency ; ( 2 ) high energy efficiency , energy conservation ; ( 3 ) organic volatiles (VOC) less friendly to the environment ; ( 4) coating various substrates such as paper, plastic, leather, metal, glass , ceramics, etc. ; Therefore, the Light Cure coating is a fast drying , energy-saving and environment-friendly paint .
Light-cured resin Usage Currently, light-cured composite resins are widely used in clinical, its performance is good, beautiful color lasting, easy operation, low cost, low speed handpiece is most welcome. But photosensitive resin has phototropism. Currently used directly in the mouth filling method, light from one direction, this will inevitably cause cave, wall surface of the resin polymerization is less than that cave junction showing fractured tooth body . Research has shown that light-cured composite resin after curing degree of 43% to 64% , this filling material properties actually only play its 1/2 to 2/3. To solve this problem, the clinical usually layering (each 2 mm) light curing, but the law of each layer are exposed to humid environment in the oral cavity, so that the filling on the existence of the n-1 " dimension "is a single layer stacked.
Light-cured phone features Comparison of the treatment of the oral cavity On a large area of deep caries, low speed handpiece many traditional repair methods have advantages and disadvantages: Amalgam high hardness, compressive strength, but no adhesion (no two-way stretch), rely on a mechanical interlock force, there creep, there is a certain corrosive and toxic, leachables analysis found mercury, silver, copper, zinc dissolution ; glass ionomer cement with good adhesion, but the hardness is poor, do not wear, easy to change; inlays (including alloy, plastic, porcelain, etc.) prosthetics, crown crown nuclear prosthetics, metal shell crowns and porcelain crowns and other methods of clinical application is very broad, but when the wear and tooth preparation, and the process is complicated and costly.