The movement of teeth in the bone tissue of the jaw occurs due to constant low pressure, which activates osteoclasts and osteoblasts. Bracket systems create a hard-coded thrust vector, forcing the roots to change the angle of inclination inside the alveolar process. The accuracy of positioning of each lock on the enamel determines the final result of the treatment. A one millimeter mistake by the doctor when gluing the braces will lead to a reversal of the crown along the axis and disruption of occlusal contacts between the jaws. The mechanics of arc and groove operation The orthodontic arc made of nickel-titanium alloy acts as the power element of the device. The material has a shape memory effect - being curved along a curved dentition, the arch tends to return to its original parabolic state, dragging the teeth with it. The bracket groove has preset angles of torc and angulation, which dictate the correct spatial position of the tooth root. The friction between the arc and the groove walls slows down the movement, so orthodontists polish the grooves during the manufacturing phase. According to the material of manufacture, locks are divided into the following types:: - metal medical grade stainless steel; - sapphire crystals made from artificially grown crystals; - ceramic made of polycrystalline aluminum oxide. Sapphire braces have high aesthetics, but are fragile under chewing loads. Metal systems can withstand high pressure and provide minimal friction in the groove, speeding up the process of leveling the dentition. Traction control and fixation elements Elastic or metal ligatures ensure the retention of the arc in the groove. In Damon-type self-ligating systems, this role is performed by a sliding lid built into the bracket, which reduces the friction force and allows for longer activation intervals. Elastic chains and steel springs are used to close the gaps after tooth extraction. The elastic tension drops by 30 percent on the first day under the influence of saliva and temperature in the oral cavity. The arcs are changed in a strict sequence: - thin round arcs made of NiTi alloy for initial alignment; - rectangular arcs to control the slope of the roots (torc); - rigid steel arches for closing post-extraction gaps. Bite correction requires the wearing of inter-jaw traction - rubber rings that the patient puts on the hooks of the braces themselves. The thrust vector moves the lower jaw forward or backward, depending on the scheme prescribed by the doctor. The effect of equipment on periodontitis Pressure on the bone wall of the alveoli causes bone resorption along the tooth movement and the construction of new tissue on the opposite side. Exceeding the permissible traction force leads to periodontal ligament ischemia and bone cell necrosis. The rapid movement of teeth in aggressive arches provokes the resorption of the root tips (resorption). The orthodontist monitors the condition of the roots with the help of control X-rays at the stages of changing thick steel arches. The complex configuration of locks and hooks creates retention points for plaque accumulation. Brushing teeth requires the use of V-shaped brushes, monopods, and brushes to remove biofilm from under the arch and around each bracket. Melbet stands out as one of the leading bookmakers thanks to its wide selection of sports markets and attractive bonuses. The key to getting the biggest welcome package is using a proven promo code. Right in the center of this excellent opportunity is the exclusive melbet promo code for free bet today when signing up and receive up to $130 as an increased sports welcome bonus on your first deposit. Use these funds on pre-match bets, live betting, accumulators, or virtual sports.
