Department of Biomedical and Neuromotor Science, Section of Clinical Dentistry, Alma Mater Studiorum, Università di Bologna, Via San Vitale, 59, 40125 Bologna, Italy.
Int J Environ Res Public Health. 2022 Mar 29;19(7):4028. doi: 10.3390/ijerph19074028.
This retrospective study aimed to verify that the onset of delayed infection after lower third molar extraction was influenced by the amount of distal space.
We evaluated 265 patients (age range 12-55 years), who had one or two mandibular third molars to be extracted. All 380 third molars were removed for orthodontic reasons, periodontal disease, or pericoronitis and were evaluated by the Pell and Gregory classification using the panoramic radiographs.
Delayed infection, characterized from purulent exudates from the alveolus and swelling, was reported in 21 extractions between 2 and 8 weeks after surgery. In 16 of the 21 cases of infection, a class III of Pell and Gregory was observed, and this anatomic condition evidenced an extremely reduced space distal to the second molar.
This study confirmed that the absence of distal space was significantly correlated with delayed infection. These data are important for proper examination of a patient because, in the case of class I or II of Pell and Gregory, a delayed infection was less likely to occur, while a class III of Pell and Gregory could indicate a greater likelihood of this type of infection.
本回顾性研究旨在验证下颌第三磨牙拔除后迟发性感染的发生是否与远中间隙的大小有关。
我们评估了 265 名患者（年龄 12-55 岁），他们有一颗或两颗下颌第三磨牙需要拔除。所有 380 颗第三磨牙因正畸、牙周病或冠周炎而被拔除，并使用全景片根据 Pell 和 Gregory 分类进行评估。
术后 2 至 8 周，有 21 例拔牙后出现化脓性渗出物和肿胀的迟发性感染。在 21 例感染中，有 16 例观察到 Pell 和 Gregory 分类的 III 类，这种解剖条件表明第二磨牙远中极狭窄的空间。
本研究证实，远中间隙缺失与迟发性感染显著相关。这些数据对于正确检查患者非常重要，因为在 Pell 和 Gregory 的 I 类或 II 类的情况下，迟发性感染发生的可能性较小，而 Pell 和 Gregory 的 III 类则可能表明这种感染的可能性更大。
