With the development of China's economy and the improvement of people's health awareness, the demand for dental medical services has increased rapidly. In recent years, with the continuous publicity of oral health, the awareness of oral health of domestic residents has gradually increased. The results of the fourth national oral health epidemiological survey showed that the awareness rate of residents' oral health knowledge was 60.1%, and 84.9% of residents had a positive attitude towards oral health care.

At present, the comprehensive dental treatment table is an indispensable medical equipment in the daily diagnosis and treatment of stomatology. A dental unit is a complex integrated system that provides supplies (such as gas, water, electricity) and equipment for various dental care services. The water circuit of the dental treatment table is an important part of the dental treatment table. Its main function is to provide cooling and flushing water for treatment equipment such as mobile phones and three-purpose guns.

Hypochlorous acid disinfection of oral comprehensive treatment table

In 1963, British dentist Blake first reported the contamination of the dental unit waterway and found that the dental unit waterway contained a lot of bacteria. It was found that after the new oral comprehensive treatment table was connected to the water supply pipeline for a week, the bacterial concentration in the water supply pipeline could reach 2105CFU/mL, and the long-term use could reach up to 1.0106CFU/mL.

The dental unit water path consists of narrow, slender pipes that are easily contaminated with bacteria and form biofilms in the pipes. During the treatment process, the bacteria colonized in the waterway of the comprehensive dental treatment table are often washed away by the water flow, and can enter the patient's mouth with the water flow, or be inhaled into the respiratory tract by the aerosol generated by the patient or dental medical staff through the ultrasonic scaler and the high-speed turbine handpiece. cause infection; therefore, waterway contamination of the dental unit is considered to be one of the important ways to cause cross-infection of teeth.

Hypochlorous acid disinfection of oral comprehensive treatment table

The bacteria isolated from the waterway of the dental unit are mainly from the natural environment, such as Legionella, Pseudomonas, non-tuberculous mycobacteria, etc. Second, bacteria from the human body, such as Staphylococcus aureus, protozoa, fungi, molds, etc. are rare, but there have also been reports of these pathogens being isolated from the dental unit waterway. The production of these bacteria causes varying degrees of damage to the mouth and body.

Therefore, the pollution of the waterway of the dental unit has attracted more and more attention. Ozone water and hypochlorous acid water are the most commonly used treatment methods, so which is the best?

Hypochlorous acid generator

In 2017, an article "Research on Intervention Methods for Waterway Water Pollution of Comprehensive Oral Treatment Stations in Medical Institutions" written by Jiang Ning et al. of Shanghai CDC was published in "Chinese Journal of Disinfection". Through on-site sampling and quantitative bacterial detection, the disinfection effect of hypochlorous acid water and ozone water on the waterway of the oral treatment table was observed. The main contents and viewpoints are summarized as follows:

1. The study found that the hypochlorous acid water with the effective chlorine concentration of 20 mg/L can significantly reduce the bioburden of the Salix salsa and improve the water quality of Salix Salix.

2. Under the action of using the hypochlorous acid generator to produce hypochlorous acid water, due to the continuous shedding of the biofilm in the first week, the total number of bacterial colonies slowly increased. After the biofilm was thoroughly treated, the water quality of the entire pipeline improved for a long time.

3. Disinfection intervention measures can significantly improve the water quality and hygiene quality of oral comprehensive treatment table, and the disinfection effect of hypochlorous acid water treatment is better than that of ozone water.

Note: The solubility of ozone in water is relatively low, generally 0.1-10 mg/L. When the concentration of ozone water is high, ozone can easily escape from the water, resulting in a pungent odor.

In recent years, domestic scholars have begun to study the hypochlorous acid water of the hypochlorous acid generator. Using three different concentrations of hypochlorous acid water (10, 20, and 40 mg/L) to continuously disinfect the dual water sources, the average pass rates of the tested water samples were 98.33%, 98%, and 99.25%. During the period, the waterway of the comprehensive dental treatment unit was stopped, and then the microbial biomass of the water sample was detected, and the qualified rate of water quality dropped to 0.

Hypochlorous acid generator

Hypochlorous acid water from a 10 mg/L hypochlorous acid generator was used to test the waterway of the dental comprehensive treatment station. Before disinfection, the water quality hygiene qualification rate of the oral comprehensive treatment station was only 8.85%. After the hypochlorous acid water was continuously disinfected, the hygienic quality The pass rate increased to 49.15%. It is suggested that DUWLs are heavily contaminated. Disinfection of dual water sources with hypochlorous acid water can improve the sanitation quality of waterway water and prevent the occurrence of infection.

It can be seen from the above experiments that it is feasible to control the pollution of the hypochlorous acid water of the hypochlorous acid generator to the disinfection of the waterway of the oral comprehensive treatment table. It is reported that my country has formulated the "GB/T "Sanitary and Sanitary Requirements for the Water System of Dental Comprehensive Treatment Machines (Draft for Approval)" in response to the waterway pollution of the dental comprehensive treatment table. I believe that in the near future, with the implementation of the standard, the water consumption of the dental unit will be greatly increased, which will add better assistance to the field of oral treatment.