Alkhadra Thamer
Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia.
J Int Soc Prev Community Dent. 2017 Sep-Oct;7(5):223-226. doi: 10.4103/jispcd.JISPCD_222_17. Epub 2017 Sep 18.
The aim of this study was to consider the available evidence regarding early extraction of permanent first molars (PFMs) in different mixed dentition stages that affect the integrity of occlusion and the implications for treatment planning.
Electronic database, including PubMed and Science Direct, searches were conducted for available evidence. Key terms used in the search were "extraction," " first permanent molar," and "mixed dentition."
The initial search identified 56 studies to be related to the review. Although a significant number of published articles had dealt with early extraction of PFM, only three studies had fulfilled the final selection criteria to be considered for this systematic review.
Future active appliance treatment is important after extraction of PFMs with poor prognosis. If such therapy is not needed, consideration should be given to extraction at the ideal developmental age to achieve spontaneous space closure. Each case should be assessed for the need of balancing or compensating extractions to preserve the dental midline and prevent overeruption.
本研究的目的是考量不同混合牙列期有关恒牙第一磨牙（PFMs）早期拔除的现有证据，这些证据会影响咬合的完整性以及对治疗计划的影响。
在包括PubMed和Science Direct在内的电子数据库中进行检索以获取现有证据。检索中使用的关键词为“拔牙”“第一恒磨牙”和“混合牙列”。
初步检索确定了56项与该综述相关的研究。尽管大量已发表文章涉及PFMs的早期拔除，但只有三项研究符合纳入本次系统综述的最终选择标准。
对于预后不佳的PFMs拔除后，未来积极的矫治器治疗很重要。如果不需要此类治疗，则应考虑在理想发育年龄进行拔牙以实现自然间隙关闭。应评估每个病例是否需要进行平衡或补偿性拔牙，以保持牙中线并防止过度萌出。
