China Journal of Oral and Maxillofacial Surgery ›› 2024, Vol. 22 ›› Issue (2): 165-169.doi: 10.19438/j.cjoms.2024.02.009

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Evaluation of the effect of nitrous oxide combined with local anesthesia in extraction of impacted teeth

KANG Cheng1,2, ZHU Ting2, HAN Shuang3, LOU Yi-yi2   

  1. 1. Zhejiang Chinese Medicine University. Hangzhou 310053;
    2. Department of Oral and Maxillofacial Surgery, Shaoxing Stomatological Hospital. Shaoxing 312000, Zhejiang Province, China;
    3. Department of Anesthesiology, Shaoxing Stomatological Hospital. Shaoxing 312000, Zhejiang Province, China
  • Received:2023-07-27 Revised:2023-10-11 Online:2024-02-20 Published:2024-03-27

Abstract: PURPOSE: To evaluate the effect of nitrous oxide combined with local anesthesia in the extraction of impacted teeth and its effect on patients' anxiety. METHODS: A total of 188 patients undergoing impacted tooth extraction in Shaoxing Stomatological Hospital from December 2021 to December 2022 were selected and randomly divided into experimental group and control group, with 94 patients in each group. The control group was treated under local anesthesia, and the experimental group was treated under local anesthesia combined with nitrous oxide. The heart rate(HR), Ramsay sedation score and pain VAS score during local anesthesia, tooth extraction and 5 min after tooth extraction were compared between the 2 groups. The Modified Dental Anxiety Scale(MDAS) scores and the comfort level of patients after treatment were compared between the two groups. SPSS 22.0 software package was used for data analysis. RESULTS: With the change of treatment time, HR in both groups showed a trend of increasing at first and then decreasing (P<0.05). HR in the experimental group was significantly lower than that in the control group during local anesthesia, tooth extraction and 5 minutes after tooth extraction(P<0.05). The MDAS score of the experimental group was significantly lower than that of the control group(P<0.05). Ramsay sedation scores in both groups decreased at first and then increased with the change of treatment time(P<0.05). The Ramsay sedation score of the experimental group was significantly higher than that of the control group during local anesthesia, tooth extraction and 5 minutes after tooth extraction (P<0.05). With the change of treatment time, the VAS score of the two groups gradually increased (P<0.05). The VAS score of the experimental group was significantly lower than that of the control group during local anesthesia, tooth extraction and 5 min after tooth extraction(P<0.05). The comfort of the experimental group was significantly better than that of the control group(P<0.05). CONCLUSIONS: Nitrous oxide combined with local anesthesia for extraction of impacted teeth can reduce HR, improve patients' anxiety and sedation, reduce pain and improve comfort.

Key words: Comfortable laughing gas, Minimally invasive tooth extraction, Impacted wisdom teeth, Anxiety

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