Extraction of the lower third molar is one of the most common procedures performed in oral surgery. In general, impacted tooth extraction involves sectioning the tooth’s crown and roots. In order to divide the impact...Extraction of the lower third molar is one of the most common procedures performed in oral surgery. In general, impacted tooth extraction involves sectioning the tooth’s crown and roots. In order to divide the impacted tooth so that it can be extracted, high-speed air turbine drills are frequently used. However, complications related to air turbine drills may occur. In this report, we propose an alternative tooth sectioning method that obviates the need for air turbine drill use by using a low-speed straight handpiece and carbide bur. A 21-year-old female patient presented to the institute’s dental hospital complaining of symptoms localized to the left lower third molar tooth that were suggestive of impaction. After physical examination, tooth extraction of the impacted left lower third molar was proposed and the patient consented to the procedure. The crown was divided using a conventional straight low-speed handpiece and carbide bur. This carbide bur can easily cut through the enamel of crown. On post-operative day number five, suture was removed and the wound was extremely clear. This technique could minimise intra-operative time and reduce the morbidity associated with air turbine drill assisted lower third molar extraction.展开更多
The high-volume evacuation(HVE)is commonly employed as a primary source control measure for removing splatter emitted from mouth during dental treatments,but there is still a lack of comprehensive understanding of its...The high-volume evacuation(HVE)is commonly employed as a primary source control measure for removing splatter emitted from mouth during dental treatments,but there is still a lack of comprehensive understanding of its efficiency.Based on our previous experiments on the emission characteristics during dental treatments,this study employed computational fluid dynamics(CFD)simulations to investigate the impact of emission parameters(droplet size,emission velocity,emission angle),HVE usage methods(distance between HVE and the droplet release source),and HVE suction flow rates on its removal efficiency.The effect of HVE on fallow time(FT)was also examined.Cumulative removal efficiency that accurately reflected the HVE effect was proposed as an evaluation index.It was found that emission velocity and distance between HVE and the source were key factors determining cumulative removal efficiency.When the distance was 4 cm,the cumulative removal efficiencies for low-velocity(0.8 m/s),medium-velocity(3.4 m/s),and high-velocity droplets(6.0 m/s)were approximately 97.9%,73.6%,and 58.0%,respectively.For high-velocity droplets at 6.0 m/s,decreasing the distance from 4 cm to 2 cm and 1 cm increased the cumulative removal efficiency from 58.0%to 76.7%and 100%.This study was expected to enhance the understanding of HVE performance and provide information on its usage method.It also indicated the need for developing advanced control measures that could have high efficiency in removing both low-velocity and high-velocity droplets.展开更多
文摘Extraction of the lower third molar is one of the most common procedures performed in oral surgery. In general, impacted tooth extraction involves sectioning the tooth’s crown and roots. In order to divide the impacted tooth so that it can be extracted, high-speed air turbine drills are frequently used. However, complications related to air turbine drills may occur. In this report, we propose an alternative tooth sectioning method that obviates the need for air turbine drill use by using a low-speed straight handpiece and carbide bur. A 21-year-old female patient presented to the institute’s dental hospital complaining of symptoms localized to the left lower third molar tooth that were suggestive of impaction. After physical examination, tooth extraction of the impacted left lower third molar was proposed and the patient consented to the procedure. The crown was divided using a conventional straight low-speed handpiece and carbide bur. This carbide bur can easily cut through the enamel of crown. On post-operative day number five, suture was removed and the wound was extremely clear. This technique could minimise intra-operative time and reduce the morbidity associated with air turbine drill assisted lower third molar extraction.
基金supported by the Fundamental Research Funds for the Central Universities(No.531118010378)by the Natural Science Foundation of Hunan Province of China(No.2023JJ30127).
文摘The high-volume evacuation(HVE)is commonly employed as a primary source control measure for removing splatter emitted from mouth during dental treatments,but there is still a lack of comprehensive understanding of its efficiency.Based on our previous experiments on the emission characteristics during dental treatments,this study employed computational fluid dynamics(CFD)simulations to investigate the impact of emission parameters(droplet size,emission velocity,emission angle),HVE usage methods(distance between HVE and the droplet release source),and HVE suction flow rates on its removal efficiency.The effect of HVE on fallow time(FT)was also examined.Cumulative removal efficiency that accurately reflected the HVE effect was proposed as an evaluation index.It was found that emission velocity and distance between HVE and the source were key factors determining cumulative removal efficiency.When the distance was 4 cm,the cumulative removal efficiencies for low-velocity(0.8 m/s),medium-velocity(3.4 m/s),and high-velocity droplets(6.0 m/s)were approximately 97.9%,73.6%,and 58.0%,respectively.For high-velocity droplets at 6.0 m/s,decreasing the distance from 4 cm to 2 cm and 1 cm increased the cumulative removal efficiency from 58.0%to 76.7%and 100%.This study was expected to enhance the understanding of HVE performance and provide information on its usage method.It also indicated the need for developing advanced control measures that could have high efficiency in removing both low-velocity and high-velocity droplets.
