心理应激后大鼠颞下颌关节内P物质降钙素基因相关肽的表达变化

目的 通过观察心理应激对大鼠颞下颌关节(TMJ)内P物质(SP)和降钙素基因相关肽(CGRP)表达的影响,探讨心理因素与颞颌关节病之间的关系.方法 SD大鼠90只,将动物编号,分为3组,每组30只,分别为心理应激组,足部电击组及空白对照组.采用交流箱心理应激动物模型,分别在1周,3周,5周时,取各组大鼠的颞下颌关节,在同一部位的切片,进行免疫组化(SABC法),图像分析;扫描电镜观察各组大鼠TMJ的变化.结果 心理应激1,3,5周SP(分别为为124.5±16.9,185.6±1.8,193.5±3.5)和CGRP(分别为185.9±5.3,112.5±5.2,174.3±5.3)的表达差异具有显著性(P＜0.05);扫描电镜显示心理应激后髁状突表面出现胶原纤维暴露且排列紊乱及宽窄不一等结构变化.结论 心理应激可使大鼠TMJ内的P物质、CGRP肽能神经纤维的表达发生变化,可能与颞下颌关节病密切相关.

Abstract：

Objective To observe the substance P(SP) and calcitonin gene-related peptide(CGRP) expressions in the temporomandibular joints(TM J) of the rats undergone emotional stress and explore the relationship between emotional stress and temporomandibular joint disorder(TMD). Methods Ninety SD rats were averagely randomly divided into emotional stress ( ES ) group( n = 30 ), electric foot-shocked (FS) group ( n = 30 ) and control (CON) group( n = 30). The emotional stress was induced by communication box. The TMJ tissues in ES and CON groups were removed after 1, 3 and 5 weeks of emotional stress for scanning electron microscope ( SEM ) test and immunohistochemistry test. The SP and CGRP expressions were examined with SABC immunohistochemistry and then analyzed by image analysis system. Results The expressions of SP and CGRP had significant difference after 1 ,3 and 5 weeks emotional stress ( SP: 124.5 ± 16.9,185.6 ± 1.8 and 193.5 ± 3.5, respectively; CGRP: 185.9 ±5.3, 112.5 ±5.2 and 174.3 ±5.3 ,respectively) (P＜0. 05 ). The SEM results showed that there was a series of structural change on the condylar surface after emotional stress. Conclusion The SP and CGRP energy nerve fibers take part in the TMJ pathological process undergone emotional stress.     

系统性疾病对口腔诊疗的影响与风险防范

患有口腔疾病者可能同时患有不同程度的全身系统性疾病,这些伴发的系统性疾病对口腔疾病的诊疗时机、方案制订等带来影响和风险。本文从心脑血管系统、血液系统、呼吸系统、内分泌系统、消化系统、泌尿生殖系统、神经及精神系统7个方面简要阐述了系统性疾病对口腔诊疗的影响以及风险防范,以期为临床提供参考。     

心理应激对大鼠实验性口腔溃疡愈合的影响及其干预的研究

目的探讨心理应激对大鼠实验性口腔溃疡模型黏膜组织愈合的影响及其干预的研究。方法雄性SD大鼠80只,正常对照组(Control)随机选取5只。其余75只随机分为口腔溃疡组(U)、口腔溃疡+心理应激组(U+S)、口腔溃疡+心理应激+药物组(U+S+M),每组各25只,每组再按照实验时间点分为0、24、48、72和120 h五个亚组。应激组以及药物组大鼠每日给予6 h束缚应激,连续应激1周。1周后,溃疡组、应激组以及药物组大鼠使用尖端直径为4 mm的单电电极灼烧大鼠舌体部建立实验性口腔溃疡模型,模型建立成功后按照时间点要求继续给予应激,同时药物组每日按1 mg/kg皮下注射地西泮。实验期间进行大鼠体质量测量、行为学检测、血清学检测,采用组织学和免疫组织化学方法分别观察口腔溃疡的组织病理学改变和热休克蛋白70(Hsp70)的表达情况。结果心理应激后大鼠表现出体质量增长减慢、行为异常、血清皮质酮及促肾上腺皮质激素浓度升高等一系列变化(P<0.05),心理应激影响下大鼠口腔溃疡的愈合进程减慢,炎细胞浸润高于对照组,血管及胶原再生均低于对照组以及Hsp70表达高于对照组、溃疡组(P<0.05)。结论心理应激能够延缓口腔溃疡黏膜组织的愈合进程,抗应激药物则可有效对抗心理应激在口腔溃疡愈合中的负性效应。     

肌位咬合板对颅颌功能紊乱的作用

肌位咬合板对颅颌功能紊乱的作用陈永进王美青王惠芸（第四军医大学口腔医学院解剖生理学教研室西安７１００３３）关键词颞颌关节肌电咬合板中图号Ｒ７８２．６３咬合板已广泛用于颅颌功能紊乱（ＣＭＤ）的治疗，但对于其种类、作用机理和应用至今仍存在不同看法［１，２...     

慢性气道疾病患者口腔健康管理及诊疗风险防范专家共识（2022版）

随着2019新冠肺炎疫情的暴发,人们愈发重视口腔疾病与呼吸病的关系。然而,临床医师对慢性气道疾病患者的口腔健康管理和医疗风险防范方面仍然存在一些疑惑。为此,中华口腔医学会第五届全科口腔医学专业委员会专家组联合呼吸与危重症医学领域专家,就慢性气道疾病患者的口腔健康管理提出专家共识,同时帮助口腔医师在慢性气道疾病患者的临床...     

大学生社交焦虑与班集体人际关系的调查研究

目的 了解大学生社交焦虑和班集体人际关系现状,为高校心理健康保健提供确实的依据。方法 对重庆市3所大学共5个班进行交往焦虑量表和大学班级集体人际关系问卷调查。结果 农村大学生的社交焦虑高于城镇大学生;男生的负向人缘系数高于女生;非独生子女大学生的负向人缘系数高于独生子女大学生;大学生社交焦虑与负向人缘系数呈显著负相关,大学生的自我认知和自我体验与实际的人际关系并不完全一致。结论 大学生社交焦虑与负向人缘系数呈显著负相关。     

器具辅助松解技术联合核心稳定训练治疗非特异性下背痛的疗效观察

目的:观察器具辅助松解技术(IASTM)联合核心稳定训练(CSE)治疗非特异性下背痛(NLBP)的疗效。方法:采用随机数字表法将90例NLBP患者分为CSE组、IASTM组及观察组,每组30例。3组患者均给予健康宣教,CSE组辅以核心稳定训练,包括卷腹训练、侧桥训练、膝位交叉伸展训练等,每天训练1次,每周训练3 d;I...     

破骨细胞分化因子和破骨细胞生长抑制因子在牙周组织细胞中的表达

目的:检测炎症前细胞因子IL- 1β和骨成熟因子PGE2 对人牙周膜细胞和牙龈成纤维细胞破骨细胞分化因子(osteoclast differentiation factor,ODF)和破骨细胞生长抑制因子(osteoclastogenesis inhibitory factor,OCIF)表达的影响.方法:用RT- PCR和Southern- blot对该2 种细胞在IL- 1β或PGE2作用下细胞中ODF和OCIF mRNA的表达进行半定量.结果:上述2 种细胞在IL- 1β或PGE2作用下,ODF和OCIF的合成均有升高,各细胞合成ODF和OCIF的峰值随IL- 1β或PGE2作用时间和浓度的不同而发生变化.结论:牙周组织中ODF和OCIF可能同时参与炎症反应,并受致炎因子IL- 1β和骨代谢因子PGE2调节.     

Influence of occlusal splint thickness on the position of mandible

Objective: To investigate the influence of occlusal splint thickness on mandibular movement. Methods: Stabilization occlusal splints of 3, 5 and 7 mm thickness were respectively used during clenching from light contact in intercuspal position and the movement of condyles and incisor point were recorded in 5 healthy subjects. Results :The condyles moved anteriorly and superiorly without wearing occlusal splint. When wearing the occlusal splints the condyles displaced anteriorly and inferiorly. The distance of displacement increased gradually with raising the thickness of splint, though the significant difference was just found in right condyle in superior- inferior movement. The condyles went again on a path of anterior and superior direction when subjects clenched from the displaced position. In right condyle the displacement was significantly greater at 7 mm splint than that at 3 mm splint both in anterior-posterior and inferior-superior direction, while in left condyle only in anterior-posterior direction. Meanwhile, the incisal point movement was larger at 7 mm splint than at 3 mm splint in inferior-superior direction. In tapping movement there were no significant differences in condyle movement between the different thickness of occlusal splint. However, the coefficient of variation in total cycle time was the greatest when wearing the splint of 7 mm. Conclusion: Occlusal splint of 7 mm has greater effect than that of 3 mm on condyle movement, but no obvious difference with occlusal splint of 5 mm. When occlusal splint of 7 mm is inserted, the stability of condyle might be influenced during tapping movement.