J Dent:**和第二前磨牙拔除对第三磨牙的影响:一项回顾性纵向研究

2017-04-01 MedSci MedSci原创

这篇研究是为了阐明在正畸治疗过程中,第一和第二前磨牙拔除对于上下颌第三磨牙萌出空间以及第三磨牙的位置和角度的影响。

这篇研究是为了阐明在正畸治疗过程中,第一和第二前磨牙拔除对于上下颌第三磨牙萌出空间以及第三磨牙的位置和角度的影响。

共有296名患者参与了此项调查研究。其中,218名患者进行正畸治疗未拔除牙齿,另78名患者拔除了第一和第二前磨牙。第三磨牙的萌出空间在正畸治疗前后应用头颅侧位片进行观察,而第三磨牙的萌出角度、垂直位置、与下颌管的位置关系以及矿化程度在治疗前后通过全景X线进行评估。所有结果均进行统计学分析。

结果显示,正畸治疗前,拔牙和未拔牙相比较,上下颌第三磨牙在垂直位置上萌出空间的增加和变化具有显着性差异。而萌出角度、与下颌管的位置关系以及矿化程度在治疗前拔牙或未拔牙之间未见明显不同。

在处于发育过程中的正畸患者,磨牙后区的空间和第三磨牙的位置不同人存在较大差异。前磨牙拔除对于第三磨牙的萌出空间和垂直位置具有积极作用,并且不会影响第三磨牙的萌出角度。研究者认为,基于前人的研究结果,本项课题所得结论还需与其仔细对照。另外,为于深入理解这种复杂性课题还需要更多的前瞻性研究来实现。

临床意义:这项研究强调了是否对第三磨牙进行正畸治疗可能对整个治疗计划存在一定的影响。

原始出处:

Miclotte A, Grommen B, et al. The effect of first and second premolar extractions on third molars: A retrospective longitudinal study. J Dent. 2017 Mar 27. pii: S0300-5712(17)30074-X. doi: 10.1016/j.jdent.2017.03.007.

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