未受影响的第三磨牙拔除对相邻第二磨牙牙周状况的影响。
Impacts of non-impacted third molar removal on the periodontal condition of adjacent second molars.
机构信息
State Key Laboratory of Military Stomatology, Department of Periodontology, School of Stomatology, National Clinical Research Center for Oral Diseases, Fourth Military Medical University, Xi'an, China.
State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, China.
出版信息
Oral Dis. 2020 Jul;26(5):1010-1019. doi: 10.1111/odi.13314. Epub 2020 Mar 12.
OBJECTIVE
The aim of this study was to determine how the removal of non-impacted third molars (N-M3s) affects the periodontal status of neighboring second molars (M2s).
SUBJECTS AND METHODS
The periodontal condition of M2s for which the neighboring N-M3s were removed (more than 6 months previously) and those with intact N-M3s was analyzed in a cross-sectional observation study. In an additional case series, periodontal changes in M2s in response to adjacent N-M3 removal were observed during a 6-month follow-up period.
RESULTS
A total of 457 patients with 1,301 M2s were enrolled in this cross-sectional observational study. Compared to M2s with neighboring N-M3s, M2s without neighboring N-M3s (teeth removed more than 6 months previously) exhibited a 0.27-mm reduction in the average pocket depth (PD) (p < .001) and a 0.38-fold reduced risk of at least one probing site with PD ≥5 mm (PD5+) (p < .001). Subsequently, a 41-case follow-up study showed that 6 months after neighboring N-M3 extraction, the PD of the M2s decreased by 0.31 mm (p < .001), while the incidence of PD5+ decreased by 21.9% when compared to the parameters detected before tooth extraction (p = .004).
CONCLUSIONS
Removing N-M3s was associated with an improved periodontal condition in neighboring M2s.
目的
本研究旨在确定拔除未萌第三磨牙（N-M3）如何影响相邻第二磨牙（M2）的牙周状况。
受试者和方法
在一项横断面观察研究中，分析了拔除邻接 N-M3（超过 6 个月前）的 M2 的牙周状况，以及邻接 N-M3 完整的 M2 的牙周状况。在另外一个病例系列中，观察了相邻 N-M3 去除后 M2 在 6 个月随访期间的牙周变化。
结果
共有 457 名患者的 1301 颗 M2 参与了这项横断面观察研究。与邻接 N-M3 的 M2 相比，无邻接 N-M3（超过 6 个月前拔除的牙齿）的 M2 的平均牙周袋深度（PD）平均减少 0.27mm（p<.001），至少有一个 PD≥5mm 的探查部位的风险降低了 0.38 倍（PD5+）（p<.001）。随后，一项 41 例随访研究表明，在邻接 N-M3 拔除后 6 个月，M2 的 PD 降低了 0.31mm（p<.001），与拔牙前检测到的参数相比，PD5+的发生率降低了 21.9%（p=.004）。
结论
拔除 N-M3 与相邻 M2 的牙周状况改善有关。
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