In bedridden elderly people, it is not rare for dental treatment to be missed for long periods of time, occasionally resulting in pain, bleeding and ulcers around the oral cavity due to prosthetic appliances or sharp edges of the teeth, etc. For such cases, early removal of the cause is necessary. In the case of patients in poor general condition with dysphagia, there is the risk of aspiration during the procedure of teeth cutting performed under water-spray cooling. Therefore, we studied the beneficial effect of using 2 suction lines for intraoral suctioning. The subjects were healthy adults aged 26 to 57 year-old, consisting of 5 males and 5 females, who could swallow normally. A turbine dental drill was rotated without a load for one minute under water supply at the occlusal surface of the left lower first molar tooth. With oral suctioning performed using the following 4 techniques for each subject, we measured and compared the amount of liquid accumulated in the oral cavity in the subjects. Technique 1: suction was performed through a single line with the suction tube placed on the buccal side of the left first molar ; technique 2-1：in addition to suction as in technique 1, a second suction line was placed near the turbine on the lingual side; technique 2-2： the suction tube of the second suction line was placed on the lingual side at a distance of about 5 mm from the turbine; technique 2-3：the second suction line was placed at the side of the root of the tongue. The average amounts of accumulated saliva in the oral cavity for techniques 2-1, 2-2, and 2-3 were significantly lower compared with the amount for technique 1 (p＜0.01). Based on the findings, it became clear that the use of 2 suction lines at the time of cutting of teeth under water-spray cooling is effective for preventing aspiration of water into the pharynx/larynx.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract