PDF(Pubmed)
Abstract：
UNASSIGNED: To investigate the effect of micro-implant anchorage combined with a clear aligner on the efficiency of mandibular molar distalization and the protection of anterior teeth anchorage, provide reference for clinical scheme design.
UNASSIGNED: This is a prospective study. Seventeen patients who were treated in the Orthodontics Department of the Hospital of Stomatology affiliated to Fujian Medical University from 2019 to 2021 and used Invisalign clear aligners to move mandibular molars distally were included and divided into two groups according to anchorage types: Group-A and Group-B. Group-A (ten cases) were treated without micro-implant anchorage, while Group-B (seven cases) were treated with micro-implant anchorage nails for enhanced anchorage. The effect of micro-implant anchorage on crown and root distal movement of mandibular molars and the difference in three-dimensional movement between mandibular molars and mandibular central incisors were analyzed.
UNASSIGNED: The crown distalization efficiency of mandibular first and second molars in Group-B was 68.66% and 71.02%, respectively, which were higher than those in Group-A(p<0.05). The mandibular central incisors in Group-A showed labial displacement and a small amount of elongation, while those in Group-B showed less anchorage loss(p<0.05). In Group-A, the crown was tilted in the distal direction and moved in the buccal direction during mandibular molar distalization(p<0.05). While in Group-B, the crown was tilted in the distal directio (p<0.05) and the mandibular second molar was depressed(p<0.05).
UNASSIGNED: In the process of mandibular molar distalization assisted by micro-implant anchorage combined with a clear aligner, better protects the anchorage of the mandibular central incisor and improves the efficiency of the molar crown distalization.
UNASSIGNED: This is a prospective study. Seventeen patients who were treated in the Orthodontics Department of the Hospital of Stomatology affiliated to Fujian Medical University from 2019 to 2021 and used Invisalign clear aligners to move mandibular molars distally were included and divided into two groups according to anchorage types: Group-A and Group-B. Group-A (ten cases) were treated without micro-implant anchorage, while Group-B (seven cases) were treated with micro-implant anchorage nails for enhanced anchorage. The effect of micro-implant anchorage on crown and root distal movement of mandibular molars and the difference in three-dimensional movement between mandibular molars and mandibular central incisors were analyzed.
UNASSIGNED: The crown distalization efficiency of mandibular first and second molars in Group-B was 68.66% and 71.02%, respectively, which were higher than those in Group-A(p<0.05). The mandibular central incisors in Group-A showed labial displacement and a small amount of elongation, while those in Group-B showed less anchorage loss(p<0.05). In Group-A, the crown was tilted in the distal direction and moved in the buccal direction during mandibular molar distalization(p<0.05). While in Group-B, the crown was tilted in the distal directio (p<0.05) and the mandibular second molar was depressed(p<0.05).
UNASSIGNED: In the process of mandibular molar distalization assisted by micro-implant anchorage combined with a clear aligner, better protects the anchorage of the mandibular central incisor and improves the efficiency of the molar crown distalization.
摘要：
■探讨微型种植体支抗结合清晰的矫正器对下颌磨牙扩张效率和前牙支抗保护的影响，为临床方案设计提供参考。
■这是一项前瞻性研究。纳入2019年至2021年在福建医科大学附属口腔医院正畸科接受治疗并使用Invisalign透明矫正器向远端移动下颌磨牙的17例患者，并根据锚固类型分为两组：A组和B组。A组（10例）未进行微种植体锚固，B组（7例）采用微种植体锚固钉增强锚固。分析微种植体支抗对下颌磨牙冠根远端运动的影响以及下颌磨牙与下颌中切牙的三维运动差异。
■B组下颌第一磨牙和第二磨牙牙冠扩张效率分别为68.66%和71.02%，分别,均高于A组(p<0.05)。A组下颌中切牙显示唇移位和少量伸长，而B组的锚固损失较少（p<0.05）。在A组中,在下颌磨牙远移期间，牙冠向远端方向倾斜并向颊方向移动（p<0.05）。在B组中，牙冠向远端倾斜（p<0.05），下颌第二磨牙凹陷（p<0.05）。
■在微植入物支抗结合清晰矫正器辅助下颌磨牙扩张的过程中，更好地保护下颌中切牙的支抗，提高磨牙牙冠扩张效率。
■这是一项前瞻性研究。纳入2019年至2021年在福建医科大学附属口腔医院正畸科接受治疗并使用Invisalign透明矫正器向远端移动下颌磨牙的17例患者，并根据锚固类型分为两组：A组和B组。A组（10例）未进行微种植体锚固，B组（7例）采用微种植体锚固钉增强锚固。分析微种植体支抗对下颌磨牙冠根远端运动的影响以及下颌磨牙与下颌中切牙的三维运动差异。
■B组下颌第一磨牙和第二磨牙牙冠扩张效率分别为68.66%和71.02%，分别,均高于A组(p<0.05)。A组下颌中切牙显示唇移位和少量伸长，而B组的锚固损失较少（p<0.05）。在A组中,在下颌磨牙远移期间，牙冠向远端方向倾斜并向颊方向移动（p<0.05）。在B组中，牙冠向远端倾斜（p<0.05），下颌第二磨牙凹陷（p<0.05）。
■在微植入物支抗结合清晰矫正器辅助下颌磨牙扩张的过程中，更好地保护下颌中切牙的支抗，提高磨牙牙冠扩张效率。
