Scholarlink

Background <p>This study aimed to investigate the effects of various intrusion modes on the movement trends and stress distribution of lower teeth at different stages in lower central incisors during deep overbite in mixed dentition treated with clear aligners.</p> Methods <p>Three-dimensional finite element models were constructed to represent lower central incisors at different stages of Demirjian classification (stages F, G and H). Three protocols were designed to intrude lower central incisors (intrusion modes I, II and III). The analysis was conducted on the movement trends and stress distribution of the lower teeth.</p> Results <p>Regardless of root developmental stages of lower central incisors, the trend of mesial and labial movements were observed during the intrusion process. The stress in the periodontal membranes was primarily concentrated at the labial neck and lingual root apex of the lower anterior incisors. At stages F and G, intrusion mode III exhibited the most obvious movement trend along the intrusion direction. Conversely, intrusion mode I demonstrated the most significant movement trend in the stage H.</p> Conclusion <p>The displacement observed along the Z-axis (intrusion direction) was greatest for Mode III at stages F/G, and greatest for Mode I at stage H. Therefore, the factors such as the development of teeth roots, intrusion amount and modes should be fully considered for a reasonable design in clinic, which could improve the treatment efficiency.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of lower central incisors’s biomechanics at different mixed dentition stages using clear aligners for deep overbite treatment: a three-dimensional finite element analysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月6日

查看全文
  • Meiying Wu,
  • Yue Li,
  • Xinyu Xing,
  • Yumiao Chen,
  • Chengle Zhang,
  • Junhan Hu,
  • Congchong Shi

摘要

Background

This study aimed to investigate the effects of various intrusion modes on the movement trends and stress distribution of lower teeth at different stages in lower central incisors during deep overbite in mixed dentition treated with clear aligners.

Methods

Three-dimensional finite element models were constructed to represent lower central incisors at different stages of Demirjian classification (stages F, G and H). Three protocols were designed to intrude lower central incisors (intrusion modes I, II and III). The analysis was conducted on the movement trends and stress distribution of the lower teeth.

Results

Regardless of root developmental stages of lower central incisors, the trend of mesial and labial movements were observed during the intrusion process. The stress in the periodontal membranes was primarily concentrated at the labial neck and lingual root apex of the lower anterior incisors. At stages F and G, intrusion mode III exhibited the most obvious movement trend along the intrusion direction. Conversely, intrusion mode I demonstrated the most significant movement trend in the stage H.

Conclusion

The displacement observed along the Z-axis (intrusion direction) was greatest for Mode III at stages F/G, and greatest for Mode I at stage H. Therefore, the factors such as the development of teeth roots, intrusion amount and modes should be fully considered for a reasonable design in clinic, which could improve the treatment efficiency.