Abstract：Objective:To study the effect of traditional bracket and self-ligating bracket on the shape of dental arch in the treatment of crowded patients with maxillary dentition. Methods:A total of 82 patients with maxillary dentition admitted to our hospital from Feb. 2016 to Aug. 2017 were enrolled. All patients were divided into control group (n=36 cases) and study group (n=46). example). The patients in the control group were treated with traditional brackets, and the patients in the study group were treated with self-locking brackets. Comparing the upper and lower arch circumferences of the two groups of patients, the maxillary arch length index: the upper segment of the upper arch, the anterior segment of the upper arch, the middle segment of the upper arch, the entire segment of the lower arch, the anterior segment of the lower arch, the middle segment of the lower arch, etc. The maxillary arch width index: the first molar central fossa, the first molar cheek tip, the second premolar fovea, the second premolar cheek tip, the first premolar fovea, the first premolar cheek tip and the canine. Results:There was no significant difference in the circumference of the upper and lower arches between the two groups (P>0.05). The circumference of the upper and lower arches of the two groups were significantly higher than those before treatment (P<0.05), but there were statistical differences. There was no significant difference between the groups (P>0.05). There were no significant differences in the indexes of the upper segment, the anterior segment, the middle segment, the lower segment of the lower arch, the anterior segment and the middle segment between the two groups before treatment (P>0.05). After treatment, each index was significantly higher than before treatment. There was a statistical difference (P<0.05); however, there was no statistical difference between the two groups (P>0.05). The two groups of patients before treatment, the first molar central fossa, the first molar cheek tip, the second premolar fovea, the second premolar cheek tip, the first premolar fovea, the first premolar cheek tip and the canine and other maxillary teeth There was no significant difference in bow width index (P>0.05), but there was no significant difference between the two groups in the treatment of canines before treatment (P>0.05). There was no comparison between the two groups after treatment. Statistical difference (P>0.05). Conclusion:There is no significant difference between the traditional bracket and the self-locking bracket on the circumference of the arch, the length of the arch and the width of the arch. Both treatment methods can increase the circumference of the arch, the length of the arch and the width of the arch, especially the width of the anterior and premolar regions. Therefore, in terms of expanding the dental arch, the self-locking bracket has no obvious advantage compared with the conventional straight wire bracket.
张宇英. 上颌牙列拥挤患者治疗中传统托槽与自锁托槽矫治对牙弓形态的影响分析[J]. 河北医学, 2018, 24(12): 2058-2061.
ZHANG Yuying. Analysis on the Influence of Traditional Brackets and Self-ligating Brackets on the Shape of Dental Arch for Crowded Patients with Maxillary Dentition. HeBei Med, 2018, 24(12): 2058-2061.
2018, Vol. 24 
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