Abstract：Objective: To study the effect of orthodontic traction in removing the impacted lower mandibular third molar on the patient's mouth opening restriction. Methods: Totally 126 patients with low mandibular impacted third molars who were treated in our hospital from October 2019 to October 2020 were selected. According to different treatment methods, they were divided into a control group and a study group with 63 cases each. The control group was treated with conventional tooth extraction, and the study group was treated with orthodontic traction. Statistics were recorded of mouth opening, pain, swelling, and mesial and distal alveolar bone density of the two groups of patients before orthodontic treatment, before tooth extraction, and 1 week after tooth extraction. Results: The mouth opening limitation and pain scores of the study group before and 1 week after tooth extraction were lower than those of the control group before and 1 week after tooth extraction (P<0.05). In the study group, the mouth opening limitation and pain score before and 1 week after tooth extraction were lower than those before orthodontic treatment; the mouth opening limitation and pain score 1 week after tooth extraction were lower than those before tooth extraction (P<0.05). One week after tooth extraction, the degree of mouth opening limitation of the study group was 0 degree higher than that of the control group, I degree lower than that of the control group; the degree of pain - higher than that of the control group, + + lower than that of the control group; the degree of swelling - higher than that of the control group, + lower than that of the control group (P<0.05). The bone mineral density of distal and mesial alveolar in the study group before and 1 week after tooth extraction was higher than that in the control group before and 1 week after tooth extraction (P<0.05). In the study group, the bone mineral density of distal and mesial alveolar before and 1 week after tooth extraction was higher than that before orthodontic treatment; the bone mineral density of distal and mesial alveolar 1 week after tooth extraction was higher than that before tooth extraction (P<0.05). Conclusion: Orthodontic traction and extraction of low-mandibular impacted third molars can improve the patient's mouth opening, relieve pain, reduce the patient's soft tissue swelling, improve the patient's alveolar bone density, and promote the patient's recovery.
王留宏, 杨惠, 王一霖, 程岚. 正畸牵引拔除下颌低位阻生第三磨牙对患者张口受限情况的影响[J]. 河北医学, 2022, 28(6): 977-982.
WANG Liuhong, YANG Hui, WANG Yilin, et al. Effect of Orthodontic Traction Extraction of Mandibular Low Third Molars on Mouth Restriction. HeBei Med, 2022, 28(6): 977-982.
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2022, Vol. 28 
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