J Am Dent Assoc. 2024 Oct;155(10):881-891.e4. doi: 10.1016/j.adaj.2024.08.007. Epub 2024 Sep 12.
The incidence of mandibular first molar impaction is less than 0.01%, and there are no standard treatment guidelines. Orthodontic traction can be chosen as a treatment plan in some circumstances. One miniscrew in the mandibular ramus can offer sufficient anchorage for the traction of impacted mandibular molars.
A 10-year-old boy had a completely labially positioned maxillary left canine and a deeply impacted mandibular left first molar associated with a dentigerous cyst. Using 2 palatal miniscrews for distalization, space was created to align the maxillary left canine. In addition, a miniscrew in the mandibular ramus facilitated the traction of the mandibular left first molar. After 3 years and 6 months of orthodontic treatment, the integrity of the dental arch was restored, and occlusal function was reestablished.
A ramus miniscrew is an effective and viable treatment option for the orthodontic traction of deeply impacted mandibular molars.
下颌第一磨牙阻生的发生率小于 0.01%，且目前尚无标准的治疗指南。在某些情况下，可以选择正畸牵引作为治疗方案。下颌支中的一个迷你螺钉可为牵引下颌阻生磨牙提供足够的支抗。
一名 10 岁男孩的上颌左侧尖牙完全唇向错位，下颌左侧第一磨牙严重阻生，并伴有含牙囊肿。通过 2 个腭侧迷你螺钉远移，为上颌左侧尖牙的排齐创造了空间。此外，下颌支中的一个迷你螺钉有助于牵引下颌左侧第一磨牙。经过 3 年零 6 个月的正畸治疗，恢复了牙弓的完整性，重建了咬合功能。
下颌支迷你螺钉是牵引下颌阻生磨牙的有效可行的治疗选择。
