The unique advantage of electric drive meter is that it reduces operator fatigue. Some authors suggest that power driven devices are down by about 25 percent over the course of the entire time compared to manual debridement
Recently, many manufacturers have developed silicone handles. The main advantage is that repetitive motion and stress are reduced in operation. Because most power driven instruments have 25000 to 30000 KHZ frequency tips, so sophisticated mechanical action disrupted the calculus, which leads to a decrease in physical stress, and carpal tunnel syndrome. Traditional fingers rest, used to be
Only the mouth, now, is becoming more outgoing.
There are disadvantages of mechanical dental supplies. In the apparatus and in vitro, the evidence in vitro and in vivo indicates that there is a possible presence of the pathogen in the droplet outside the mouth. Studies have shown that lower power and frequency reduces the amount and distance of pollution. Suggestions include: goggles, suitable masks and shields, large-caliber high-volume evacuators, and antibacterial presensitivity in front of the instrument. The influence of noise and vibration on operator is limited. All power-driven instruments generate noise during treatment. However, 25 kHz insertion noise is below the decibel level
Recommended standards for occupational safety and health management.
The decrease of tactile sensitivity is another disadvantage of ultrasonic instruments, especially if the power setting increases and the prompt is larger. Clinicians can supplement the process with narrower blades and shorter blade length.
The generator
There are two types of equipment: sonic and ultrasonic. Piezoelectric and magnetostrictive are two kinds of ultrasonic waves. Acoustic devices operate at a relatively low frequency of 3 kHz to 8 kHz, while energy is driven by dental equipment. The range of journeys is important in distance, and the role of the tip is in orbit. Voice and reduced clinical force limit their use of multipurpose dental care.
Piezoelectric units use quartz crystals to expand and contract within a horizontal range of motion, providing a sophisticated linear function. There is very little heat, and the water doesn’t need cooling. The frequency of the cutting edge at 24 kHz to 45 kHz (per unit time period) is relatively high. Support piezoelectric devices have suggested, if there is a point along a straight line along the tooth movement, so the fingertips will never leave the teeth surface, reduce the roughness of the root and the expansion of gum, increase patient comfort. Most device design comparative studies do not support or deny these concepts and are limited by the number of design and topic studies.
The magnetostrictive device, a pioneer of power-driven instruments, has undergone a major transformation since 1957. The original design was for tooth decay, and they soon lost the invention of the high-speed dental turbine. The magnetostrictive device is mainly a manual adjustment instrument, which is pointed out to remove calculus due to its size and size. The automatic tuning device was developed ten years later to improve the ease of use without constantly adjusting the instrument. Because of the difficulty of using large methods to make contact under the gingiva, holbrooke advocated using thin methods, especially periodontal treatment. The company has developed some small methods to automatically adjust the magnetostrictive device, but the fatigue fracture caused by stress is still a serious problem.
The magnetostrictive unit converts alternating current into mechanical energy at a vibration frequency of 25 Hertz to 35 kilohertz, and is elliptical in nature. All the sides of the top are very active and the top is the most intense. Due to the versatility of the tip, more surface area can be covered on the root surface, especially in the hole with the smallest hand/wrist movement. The coil of a water cooler that passes through the coil is mandatory to offset the heat generated. The positive side effects are pre-heating irrigation to improve the antimicrobial activity of the dental equipment.