Department of Oral Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dent Med Probl. 2021 Oct-Dec;58(4):447-452. doi: 10.17219/dmp/131757.
Stress is one of the most important determinants of total antioxidant capacity (TAC).
This study aimed to assess alterations in salivary TAC following academic stress according to the personality type.
This descriptive study evaluated 53 dental students at Shahid Beheshti University of Medical Sciences, Tehran, Iran, who were divided into type A (n = 25) and type B (n = 28) personality groups using the Bortner questionnaire. Saliva samples were collected during the 1st week of the semester (a low-stress period) and during the 1st week of the final exams (a high-stress period). Salivary TAC was measured using a specific kit. The data was analyzed using the repeated measures analysis of variance (ANOVA), the analysis of covariance (ANCOVA), the χ2 tests, the independent t tests, and the Bonferroni adjustments.
Overall, salivary TAC in the high-stress period was significantly lower than that in the low-stress period (0.27 vs 0.31 mM) (p = 0.016). The comparison of salivary TAC between the type A and type B personality groups in the low-stress period showed no significant difference (p = 0.450). During the highstress period, a reduction in salivary TAC was recorded in both groups, which was borderline significant in the type A personality group (p = 0.050), but non-significant in the type B personality group (p = 0.140). The comparison of salivary TAC between the type A and B personality groups in the high-stress period also revealed no significant difference (p = 0.780).
Academic stress can decrease salivary TAC, and the personality type has no significant effect on this relationship.
压力是总抗氧化能力（TAC）的最重要决定因素之一。
本研究旨在根据人格类型评估学术压力后唾液 TAC 的变化。
本描述性研究评估了来自伊朗德黑兰沙希德·贝赫什提大学医学科学的 53 名牙科学生，他们使用 Bortner 问卷分为 A 型（n = 25）和 B 型（n = 28）人格组。在学期的第一周（低压力期）和期末考试的第一周（高压力期）收集唾液样本。使用特定试剂盒测量唾液 TAC。使用重复测量方差分析（ANOVA）、协方差分析（ANCOVA）、卡方检验、独立 t 检验和 Bonferroni 调整分析数据。
总体而言，高压力期唾液 TAC 明显低于低压力期（0.27 对 0.31 mM）（p = 0.016）。低压力期 A 型和 B 型人格组唾液 TAC 的比较无显着差异（p = 0.450）。在高压力期，两组的唾液 TAC 均减少，A 型人格组接近显着（p = 0.050），但 B 型人格组无显着性（p = 0.140）。高压力期 A 型和 B 型人格组唾液 TAC 的比较也无显着差异（p = 0.780）。
学术压力会降低唾液 TAC，而人格类型对这种关系没有显着影响。
