Journal of Prevention and Treatment for Stomatological Diseases ›› 2021, Vol. 29 ›› Issue (9): 617-623.DOI: 10.12016/j.issn.2096-1456.2021.09.007

• Clinical Study • Previous Articles     Next Articles

Study on the transverse relationship of the mandible between different skeletal vertical patterns in patients with skeletal ClassⅠ malocclusion

JIA Jingbo1(),REN Juan1,WANG Xiaoqin1,2()   

  1. 1. Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, China
    2. Department of Orthodontics, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
  • Received:2021-02-08 Online:2021-09-20 Published:2021-06-18
  • Contact: Xiaoqin WANG
  • Supported by:
    Scientific Research Program of the Health Commission of Shanxi Province(2019017)

骨性Ⅰ类错牙合不同垂直骨面型患者下颌横向关系研究

贾璟博1(),任娟1,王小琴1,2()   

  1. 1.山西医科大学口腔医学院·口腔医院,山西 太原(030001)
    2.山西医科大学第一附属医院口腔正畸科,山西 太原(030001)
  • 通讯作者: 王小琴
  • 作者简介:贾璟博,医师,学士,Email: 524014470@qq.com
  • 基金资助:
    山西省卫生健康委科研课题计划(2019017)

Abstract:

Objective To analyze the correlation between skeletal vertical patterns and mandibular dental arch width, basal arch width and the dental buccolingual inclination of patients with skeletal ClassⅠ. Methods The CBCT data of 62 skeletal ClassⅠ malocclusion patients were collected and divided into a high-angle group with 19 cases, a mean-angle group with 22 cases, and a low-angle group with 21 cases according to the GoGn-SN angle. Mandible 3D reconstruction of the three groups was performed using Dolphin software, and dental arch widths, basal arch widths and buccolingual inclination of canines, first premolars and first molars, were measured and statistically analyzed respectively. Redults Mandibular dental arch width showed no significant difference among the three groups (P>0.05). The basal arch widths of mandibular canines and first premolars in low-angle group were larger than those in the other groups (P<0.05). The buccolingual inclinations of mandibular canines and first premolars in high-angle group were larger than those in the other groups (P<0.05). The buccolingual inclination and basal arch width of the first molars among the three groups showed no significant differences (P>0.05). Pearson correlation tests showed that the basal arch widths of mandibular canines and first premolars were negatively correlated with GoGn-SN angle. Excluding the influence of dental arch width and basal arch width, there was still a significant positive correlation between the buccolingual inclination of mandibular canines and first premolars and the GoGn-SN angle (P<0.05). Conclusion The width of the basal bone arch between different skeletal vertical patterns mainly differs in the canine segment and the premolar segment, and the difference in the buccolingual inclination of the teeth is mainly to compensate for the difference in the GoGn-SN angle. In clinical practice, individualized therapy should be adopted according to the differences to achieve the long-term efficacy of correction.

Key words: skeletal ClassⅠ malocclusion, vertical facial pattern, mandible, basal bone, arch width, buccolingual inclination, CBCT, three-dimensional measurement

摘要:

目的 研究骨性Ⅰ类错牙合不同垂直骨面型与下颌牙弓宽度、基骨弓宽度及牙齿颊舌向倾斜度的相关性。方法 收集62例骨性Ⅰ类错牙合患者的CBCT资料,根据GoGn-SN角分为3组,高角组19例、均角组22例、低角组21例,用Dolphin imaging进行三维重建,分别测量下颌尖牙、第一前磨牙、第一磨牙间的牙弓和基骨弓宽度及牙齿颊舌向倾斜度并进行统计学分析。 结果 3组下颌各段牙弓宽度的差异无统计学意义(P>0.05);低角组患者的下颌尖牙间基骨弓宽度和第一前磨牙间基骨弓宽度大于均角组和高角组(P< 0.05);高角组患者的尖牙颊舌向倾斜度和第一前磨牙颊舌向倾斜度大于均角组和低角组(P< 0.05)。磨牙间基骨弓宽度与颊舌向倾斜度在3组间的差异无统计学意义(P>0.05)。Pearson检验表明:下颌尖牙间基骨弓宽度、第一前磨牙间基骨弓宽度与GoGn-SN角呈负相关;排除下颌牙弓宽度和基骨弓宽度的影响,下颌尖牙和第一前磨牙的颊舌向倾斜度与GoGn-SN角间仍然存在显著正相关关系(P<0.05)。结论 骨性Ⅰ类错牙合不同垂直骨面型间的基骨弓宽度差异主要体现在尖牙段和前磨牙段,牙体颊舌向倾斜度的差异主要是对下颌平面角的不同进行代偿。临床中应针对差异采用个体化方案以达到矫治的长期疗效。

关键词: 骨性Ⅰ类错牙合, 垂直骨面型, 下颌骨, 基骨, 牙弓宽度, 颊舌向倾斜, 锥形束CT, 三维测量

CLC Number: