Jafari Seyed Mehdi, Motamedi Mohammad Hosein Kalantar, Jafari Mehrdad, Tabeshfar Shervin, Jafari Mehryar, Naghizadeh Mohammad Mehdi
Department of Oral and Maxillofacial Surgery, Tehran University of Medical Sciences, Iran.
Natl J Maxillofac Surg. 2010 Jul;1(2):123-6. doi: 10.4103/0975-5950.79213.
The literature focuses little attention on factors that influence third molar post extraction pain (PEP). One factor that may play a role in PEP is saliva. We undertook a study in patients subjected to third molar extraction with the aim of assessing the influence of salivary pH on PEP.
Thirty-one healthy patients with one impacted inferior lower third molar with mean age of 21.02 ± 2.05 years, underwent surgery for similar impactions. The process of pH measuring was carried out without delay after saliva collection, with a combination electrode connected to a PHM 62 pH meter. Pain assessment was done at 4, 8, 12, 18 and 24 hours on the first day. The scale ranged from 0 to 10 in which 0 and 10 denoted 'no pain' and 'maximum pain,' respectively.
The multivariate analysis suggests that the factors that influence pain are patients' sex (B = - 0.466) and the saliva pH (B = - 1.093). According to the findings of our study, PEP intensity is assumed to have a reverse correlation with salivary pH and is also assumed to be greater in females.
Due to the fact that no previous study has indicated such findings so far, further studies are needed to assess the importance of preoperative pH value and its clinical significance on the level of PEP.
文献很少关注影响第三磨牙拔除后疼痛（PEP）的因素。唾液可能是在PEP中起作用的一个因素。我们对接受第三磨牙拔除术的患者进行了一项研究，旨在评估唾液pH值对PEP的影响。
31例健康患者，均有一颗低位阻生下颌第三磨牙，平均年龄21.02±2.05岁，因类似阻生情况接受手术。唾液收集后立即使用连接到PHM 62型pH计的复合电极进行pH测量。在第一天的4、8、12、18和24小时进行疼痛评估。疼痛程度量表范围为0至10，其中0和10分别表示“无疼痛”和“最大疼痛”。
多因素分析表明，影响疼痛的因素是患者性别（B=-0.466）和唾液pH值（B=-1.093）。根据我们的研究结果，PEP强度与唾液pH值呈负相关，且女性的PEP强度更大。
由于目前尚无研究表明有此类结果，因此需要进一步研究以评估术前pH值的重要性及其对PEP水平的临床意义。
