The dental treatment chair waterway is regularly cleaned and disinfected to remove dirt and biofilm attached to the inner wall of the pipeline, preventing secondary contamination of the diagnostic and treatment water by the pipeline. Diagnosis and treatment water should contain disinfection factors to kill pathogenic bacteria such as Legionella pneumophila and Pseudomonas aeruginosa in the water, and control the total number of bacterial colonies. So, let's learn about the disinfection methods of dental treatment chairs.
1、 Relevant reference standards and specifications:
The total number of bacterial colonies in diagnosis and treatment water shall not exceed 100cfu/ml. It is recommended to choose domestic drinking water that meets at least GB5749 standards for inlet water, and to use water treated by a water treatment device for inlet water.
Solution to the total bacterial count exceeding the limit in diagnosis and treatment water
2、 Analysis of Traditional Disinfection Methods for Dental Treatment Chairs
The selection of disinfectants for dental treatment chairs should follow the principles of low toxicity, no odor, easy degradation, and no significant impact on the properties of water organs. You can choose types such as chlorine containing disinfectants, ozone, peroxides, etc.
Disinfectants: Chlorine containing disinfectants have good disinfection effects, low prices, and low usage costs. They can be used for pipeline disinfection and water disinfection, and can effectively reduce the bacterial count in oral comprehensive treatment tables. However, some studies have shown that after chlorine disinfection treatment, the bonding performance of dentin decreases. Chlorine ions have a small radius and strong penetrating power, which can damage the passivation film on the metal surface and accelerate local corrosion (such as the phenomenon of pipeline penetration corrosion). The irritating odor and toxicity (mutagenic effect) of chlorine containing disinfectants have always been a major drawback, and the use of chlorine worldwide is gradually limited and reduced.
Ozone: Ozone (O3), also known as superoxide, also known as "oxygen generating water" or "oxygen rich water", is an isotope of oxygen (O2) and has excellent disinfection and sterilization functions. It has a rapid bactericidal effect on bacteria. Ozone is soluble in water and can also be used for disinfection of tap water pipelines. But ozone is unstable in water, easy to emit and decompose, and is highly explosive when the ozone content is above 25%. At present, the allowable concentration of ozone is 0.2mg/m3. It is difficult to guarantee this low concentration of disinfection efficacy. Excessive ozone concentration can harm human health. The higher the concentration in water, the more easily ozone is emitted into the air, causing indoor ozone pollution in diagnostic rooms and other areas.
Peroxides: Peroxides mainly include and hydrogen peroxide. Strong bactericidal effect, no residual decomposition by acetic acid and oxygen after action, with a strong pungent odor and high corrosiveness, not suitable for metal pipes. Hydrogen peroxide is an ideal disinfectant that can be decomposed into water and oxygen after its action, with no residue. It can disinfect pipelines and water bodies, but it has the disadvantages of instability, effectiveness influenced by temperature, pH, light, and other factors, and unstable effectiveness.