Cyclic mechanical pressure‐loading alters epithelial homeostasis in a three‐dimensional in vitro oral mucosa model: clinical implications for denture‐wearers

Denture‐wearing affects the quality and quantity of epithelial cells in the underlying healthy oral mucosa. The physiologic mechanisms, however, are poorly understood. This study aimed to compare histologic changes and cellular responses of an epithelial cell layer to cyclic mechanical pressure‐loading mimicking denture‐wearing using an organotypic culture system to develop a three‐dimensional in vitro oral mucosa model (3DOMM). Primary human oral keratinocytes and fibroblasts were serially grown in a monolayer culture, and cell viability was measured under continuous cyclic mechanical pressure (50 kPa) for 7 days (cycles of 60 min on, 20 s off to degas and inject air). Upon initiation of an air–liquid interface culture for epithelial stratification, the cyclic pressure, set to the mode above mentioned, was applied to the 3DOMMs for 7 days. Paraffin‐embedded 3DOMMs were examined histologically and immunohistochemically. In the monolayer culture, the pressure did not affect the viability of oral keratinocytes or fibroblasts. Few histologic changes were observed in the epithelial layer of the control and pressure‐loaded 3DOMMs. Immunohistochemical examination, however, revealed a significant decrease in Ki‐67 labelling and an increase in filaggrin and involucrin expression in the suprabasal layer of the pressure‐loaded 3DOMMs. Pressure‐loading attenuated integrin β1 expression and increased matrix metalloproteinase‐9 activity. Incomplete deposition of laminin and type IV collagen beneath the basal cells was observed only in the pressure‐loaded 3DOMM. Cyclic pressure‐loading appeared to disrupt multiple functions of the basal cells in the 3DOMM, resulting in a predisposition towards terminal differentiation. Thus, denture‐wearing could compromise oral epithelial homeostasis.     

Influence of intra‐oral sensory impairment by anaesthesia on food comminution and mixing in dentate subjects

Sensory input from sensory receptors regarding food morsels can affect jaw motor behaviours during mastication. The aim was to clarify the effects of intra‐oral sensory input on the food‐comminuting and food‐mixing capacities of dentate subjects. Eleven dentate subjects without sensory dysfunction in their oro‐facial region participated in this study. Local anaesthesia was achieved on the periodontal structures and on the oral mucosa of the subjects' preferred chewing side by injecting a lidocaine solution with adrenalin. At baseline (control) and after anaesthesia, data on the subjects' food‐comminuting and food‐mixing capacities were gathered. The food‐comminuting capacity was quantified by measuring the degree of pulverisation of peanuts (objective hardness; 45·3 [Newton, N]) after a prescribed 20 chewing strokes. The food‐mixing capacity was measured as the degree of immixture of a two‐coloured paraffin wax cube after 10 chewing strokes. Wax cubes of three different hardness levels were used (soft, medium and hard: 20·3, 32·6 and 75·5 [N], respectively) and were chewed in random order. After anaesthesia, the subjects' food‐comminuting capacity significantly decreased (P < 0·001), as did the food‐mixing capacity for each hardness level of the wax cubes (P < 0·01). A significant correlation was observed between the objective hardness values and the anaesthesia effects for the food‐mixing capacity (P < 0·05), indicating that after anaesthesia, deterioration of the mixing capacity increased as the hardness increased. In conclusion, intra‐oral sensory input can affect both food‐comminuting and food‐mixing capacities.     

Teach-Back健康教育模式对学龄期手足口病患儿家属疾病认知水平及防护行为的影响

目的:探讨Teach-Back健康教育模式对学龄期手足口病(HFMD)患儿家属疾病认知水平及防护行为的影响。方法:2018年7月—2020年11月选取我院学龄期113名HFMD患儿家属为研究对象,按照随机数字表法分为对照组56例与观察组57例,对照组给予常规健康教育干预,观察组给予Teach-Back健康教育模式干预,观察两组患儿家属疾病认知水平、行为干预遵从率、患儿症状改善状况。结果:干预后,观察组患儿家属发病原因、传播途径、隔离治疗、并发症预防认知评分高于对照组(P<0.05);观察组患儿家属消毒隔离措施、饭前便后洗手、勤晒衣被、居家开窗通风遵从率高于对照组(P<0.05);观察组患儿发热、口腔溃疡、皮疹、食欲减退改善时间短于对照组(P<0.05)。结论:对学龄期HFMD患儿家属开展Teach-Back健康教育模式,可明显提高家属对疾病认知水平,提高行为干预遵从率,促进患儿恢复。     

浙江省宁波市手足口病经济负担调查研究

目的 评估宁波市手足口病经济负担。 方法 选取国家疾病监测信息报告管理系统中2011年宁波市报告的手足口病例,进行问卷调查和病历回顾,收集病例就医过程、相关费用和医疗保险等信息,估算手足口病例经济负担。 结果 共调查手足口病轻症病例106例,重症病例58例,死亡病例6例。2011年宁波市手足口病总体经济负担为3635.1万元,其中直接经济负担2181.2万元,间接经济损失1453.9万元。轻症、重症、死亡病例直接费用的中位数分别为1581、7419和21 533元,直接医疗费用的中位数分别为1431、6977和17 224元。参加至少一种医疗保险的病例占32.9%,医疗保险可为轻症、重症病例分别减轻38.2%和29.1%的直接医疗费用。 结论 手足口病给患者和社会均造成了较重的经济负担。提高医疗保险覆盖率、减少轻症病例住院比例将有助于减轻患者经济负担;控制和降低发病率,才能有效减轻手足口病对社会的经济负担。     

瘘管切除合并内口结扎治疗肛瘘临床疗效分析(附74例报告)

目的观察瘘管切除合并内口结扎治疗肛瘘的临床疗效。方法选择74例内口在肛管齿线附近的肛瘘患者,采用将瘘管完全剥离切除,内口盲端结扎的方法手术的临床资料作回顾性分析。结果 74例患者全部一次性治愈,住院时间为12~23d,完全愈合时间为22~47d。痊愈后肛门外观无缺损、移位等改变,生理功能正常。3例患者早期有少许黏液泄漏,8~10周后症状消失,肛门无失禁。结论采用瘘管切除合并内口结扎的手术方法治疗肛瘘彻底,治愈率高,疗效确切,无肛瘘再次复发。     

更昔洛韦治疗小儿手足口合并病毒性脑炎122例疗效观察

目的：探讨更昔洛韦治疗小儿手足口合并病毒性脑炎的临床疗效。方法：122例患儿按入院顺序随机分为研究组和对照组，各61例，所有患儿均根据临床不良反应给予对症的物理降温、水电解质平衡纠正、补液、抗病毒治疗、脑神经营养等，研究组在此基础上加用更昔洛韦。结果：经治疗研究组患儿总有效率明显高于对照组，数据经统计学比较具有显著差异(P<0.05)。患儿退热时间比较两组间数据无显著差异(P>0.05)，研究组疱疹消退时间、神经体征缓解时间和平均住院时间均明显短于对照组，数据经统计学比较具有极显著差异(P<0.01)。结论：更昔洛韦不仅可达到更好的治疗效果，还有助于提高治疗效率、加快改善患儿的临床不良反应，适合于手足口病合并病毒性脑炎的临床治疗。