牙髓中血管内皮生长因子的研究进展

血管内皮生长因子是一种重要的血管生成因子,主要由血管内皮细胞产生。目前研究发现牙髓及牙本质基质中也存在少量的血管内皮生长因子,在细菌脂多糖或脂磷壁酸的诱导下出现反应性增加,可能参与一些生理、病理的调控。本文就V E G F在牙髓中的生物学活性和功能及其研究进展作一综述。     

血管内皮细胞生长因子与骨折的关系

血管内皮细胞生长因子 (VEGF)是一种具有特异性促进血管内皮细胞生长和血管生成的诱导因子。骨折的修复涉及骨折位点存在的多种生长因子 ,VEGF表达贯穿于骨折愈合的全过程 ,被认为是早期骨折修复中最为重要的因素。VEGF是骨折修复过程中特定的骨痂组织生成和钙化所必需的。VEGF的含量也受到骨折断端的微环境及各种生长因子及分泌因子的调节。     

组织工程构建物血管化的研究进展

组织工程构建物血管化是制约组织工程构建物进入临床的关键问题之一.血管化的目的是建立宿主和组织工程物的血液流通,提高细胞的生存能力.本文就近几年来促组织工程构建物血管发生的相关研究作一综述.     

颌骨动静脉畸形的治疗

目的：总结颌骨动静脉畸形的诊断、治疗的经验。方法：7例颌骨动静脉畸形病例先行CT或MRI检查，了解颌骨破坏情况，7例均行栓塞治疗，栓塞材料为PVA颗粒(250～500um)，栓塞后一周内进行手术，切除颌骨病变组织。结果：7例经PVA栓塞，异常血管团块消失、搏动、杂音消失、软组织肿胀得到改善。口内渗血及动脉出血得到控制。手术后随访，无1例复发。结论：血管造影栓塞后行手术切除病变组织是治疗颌骨动静脉畸形有效而可靠的治疗方法。     

串珠素在血管损伤反应过程中作用的研究进展

串珠素是组成血管壁的主要硫酸肝素蛋白多糖。许多研究表明，它在血管损伤反应过程中对平滑肌细胞、内皮细胞以及一些生长因子都有一定的特殊作用。本文就串珠素在血管损伤反应过程中的作用作一综述。     

三叉神经根与周围血管的关系

目的：研究三叉神经根与周围血管的关系。方法：在手术显微镜下解剖灌注红色乳胶的头部标本１６例（３２例）。结果：三叉神经根与周围血管（主要是小脑上动脉和小脑下前动脉）发生接触的占５０．０％（１６／３２）,形成压迫的占１２．５％（４／３２）。结论：血管压迫三叉神经根是三叉神经痛的重要原因。     

牙髓血管再生的相关研究进展

近年来,牙髓病和根尖周病治疗的方向及研究热点已经从传统的根管治疗转向牙髓组织再生方面。牙髓组织再生主要包括神经再生、血管再生、牙本质再生等。本文就牙髓血管再生相关因子、细胞、微环境的研究进展作一综述。     

口腔鳞癌血管生成特点的研究进展

<正>血管生成是恶性实体瘤浸润和转移的组织基础。研究表明,在某些高度恶性肿瘤中存在血管生成(angiogenesis)、血管形成(vasculogenesis)和血管生成     

组织工程骨血管再生的研究进展

组织工程骨的血管再生直接影响其在体内的存活与转化,本文就组织工程骨体内血管再生的一般过程、影响因素及血管化组织工程骨的构建方法等基本问题的研究进展作一综述。     

柠檬精油对牙周致病菌抑制作用及其安全性初步研究

目的:探讨柠檬精油对牙周致病菌的体外抗菌活性及对细胞增殖的影响。方法:采用微量液体稀释法测定柠檬精油对Pg、Fn、Aa、Pi的最小抑菌浓度(minimal inhibitory concentration,MIC)及最小杀菌浓度(minimum bactericidal concentration,MBC);以较低浓度的MIC为标准稀释LEO作为实验组,采用MTT法测定柠檬精油对HUVECs的毒性作用,明确抑菌浓度下LEO的安全性。结果:柠檬精油对牙周主要致病菌均有抑菌作用,Pg、Fn、Aa、Pi的MIC分别是9.0 g/L、4.5 g/L、4.5 g/L、9.0 g/L,Aa、Fn的 MBC是9.0 g/L,Pg、Pi的MBC未测得。1/2MIC、1/20MIC浓度的LEO能够抑制人脐静脉内皮细胞的生长,而低于1/200MIC浓度的LEO则对人脐静脉内皮细胞的生长没有影响,其中1/200MIC浓度的LEO作用明显优于0.02%的CHX。结论:体外环境中,柠檬精油对牙周致病菌Pg、Fn、Aa、Pi具有抗菌活性,低浓度应用对机体相对安全。     

Oral cancer: molecular technologies for risk assessment and diagnosis

Purpose: The effective biomarkers related to diagnosis, metastasis, drug resistance and irradiation sensitivity of oral cancers will help the pathologist and oncologist to determine the molecular taxonomy diagnosis and design the individualization treatment for the patients with oral cancers.     

Computer-assisted planning for maxillofacial prosthodontic rehabilitation

Computerized tomography (CT) planning and the use of CT derived surgical templates for implant placement have shown promise for restoring function within months after surgical reconstruction of acquired post-oncologic defects.     

Stimulated whole saliva components in children with Down syndrome

The authors report on the components of stimulated whole saliva from children with Down syndrome—including pH, flow rate, sialic acid and protein concentrations, and amylase and peroxidase activity. Saliva samples were collected from 35 children aged 6–10 years. Of the participants, 17 had Down syndrome and 18 did not. To stimulate saliva production, the children chewed a piece of parafilm for 10 minutes before the sample was collected. Soon after collecting the saliva sample, the authors measured pH using a portable pH-meter. Sialic acid levels were determined with a thiobarbituric acid assay. Protein content was determined with Folin's phenol reagent. Amylase was assayed and the authors measured the maltose produced by the breakdown of starch and peroxidase using ortho-dianisidine.
No statistically significant difference was observed in levels of sialic acid (free and total) between the two groups. Protein concentration was about 36% higher in the group with Down syndrome. However, the salivary flow rate, pH, and amylase and peroxidase activities were lower among the children with Down syndrome.     

Effect of Pingyangmycin on human venous malformation endothelial cells

Purpose: Venous malformations are common vascular anomalies with a propensity of the head and neck. Intralesional injection of Pingyangmycin (PYM, bleomycin A5 hydrochloride) is a widely used sclerotherapy method for the treatment of venous malformation.     

牙髓再生的研究现状

目前,根管治疗术在临床上已得到了广泛的应用并成功的保存了患牙,但其仍有许多术后并发症。随着组织工程技术在口腔领域的应用,构建一种组织工程化牙髓进行牙髓-牙本质复合体的再生治疗成为可能。近年来国内外已有很多关于牙髓再生的研究,并且已经取得了一定成果。本文将对目前国内外牙髓再生的研究进展现状作一综述。     

Oropharyngeal dysphagia in amyotrophic lateral sclerosis alters quality of life

Dysphagia is one of the most important complications encountered in amyotrophic lateral sclerosis (ALS). Our aim was to determine whether oropharyngeal dysphagia impacted the quality of life (QoL) of patients with ALS. Thirty consecutive patients were recruited (31–82 years, 18 men). Swallowing function was evaluated using a standardised videofluoroscopic barium swallow. All the patients completed a specific questionnaire on quality of life in dysphagia (SWAL‐QoL) immediately after the videofluoroscopy. The results of dysphagia outcome severity scale separated 14 patients with oropharyngeal dysphagia and 16 with normal swallowing function. There was no difference in the average age, weight and body mass index of the two groups (dysphagic patients: 68 ± 11 kg versus non‐dysphagic patients: 69 ± 14 kg). Most of the dysphagic patients had a bulbar affection based on their Norris scores which determine the importance of cranial nerves illness (20 ± 8), significantly lower than those of the non‐dysphagic patients (35 ± 5) (P < 0·0001). There was no difference in the neurological peripheral symptoms evaluated by Amyotrophic Lateral Sclerosis Functional Rating Scale scores (dysphagic patients: 26 ± 7 versus non‐dysphagic patients: 27 ± 8) (ns). The swallowing quality of life questionnaire revealed that the dysphagic patients had significant burden (P < 0·001). They were affected by the necessity to applied a food selection (P < 0·01), by the increase in eating duration (P < 0·05) and described a decrease in eating desire (P < 0·05). They complained of fear regarding the risk of dysphagia (P < 0·05). They also described difficulties with oral communication (P < 0·001). All of those complained about dysphagia which impacted directly mental health (P < 0·05) and social life (P < 0·05). In conclusion, oropharyngeal dysphagia is a common symptom accompanying ALS, which alters the patient's QoL, especially social health.     

替牙期骨性Ⅲ类错牙合患者颞下颌关节特征的锥形束CT研究

目的:采用锥形束CT(CBCT)研究替牙期骨性Ⅲ类错牙合患者颞下颌关节的影像学特征,探讨Ⅲ类功能状态下,颞下颌关节的生长、改建机制。方法:从就诊于昆明医科大学附属口腔医院正畸科的患者中选取符合纳入标准的替牙期骨性Ⅲ类错牙合患者及骨性Ⅰ类错牙合患者各20名,使用NNT viewer 5.3图像处理软件进行三维重建及线距和角度的测量,并进行统计学分析。结果:替牙期骨性Ⅲ类错牙合患者组和替牙期骨性Ⅰ类错牙合患者组对比结果为:矢状面双侧关节前间隙偏小、双侧关节上间隙偏小、双侧关节结节斜度偏小;冠状面双侧关节内间隙偏小,双侧关节上间隙偏小,双侧关节外间隙偏小,右侧髁状突角度偏小;横截面右侧髁状突前后径偏小。结论:替牙期骨性Ⅲ类错牙合患者颞下颌关节发育不充分,呈现髁状突,关节窝深度,关节结节斜度;冠状面关节内、外间隙均较小的特征。骨性Ⅲ类错牙合患者髁状突在关节窝中处于前置近关节窝顶位置。骨性Ⅲ类错牙合患者颞下颌关节影像学特征与其功能状态相适应。     

拔牙位点保存用复合温敏凝胶的构建及体外表征

目的:制备多壁碳纳米管/羟基磷灰石/壳聚糖复合温敏凝胶,探讨其作为拔牙位点保存材料的理化性能。方法:采用原位沉积方法制备多壁碳纳米管/羟基磷灰石(MWNT/ HA简称HAC)复合无机材料,将其分散至壳聚糖温敏凝胶中,制备壳聚糖/多壁碳纳米管/羟基磷灰石(CS /MWNT/HA简称CS/HAC)复合温敏凝胶,以成胶时间、孔径、孔隙率、机械强度及降解性能为指标优化配方设计,并表征复合温敏凝胶的微观形貌及理化性能。结果:以10 g/L的HAC作为补强成分加入到壳聚糖溶液中,能够在不影响成胶并保证一定孔隙率(84%)的前提下,提高材料的机械性能(抗压强度0.441 MPa),所获复合温敏凝胶具有适宜的临床操作时间(12 min),并具有可控的降解速率。结论:负载HAC的复合温敏凝胶具有良好的成型性,并具有较好的机械性能,在拔牙位点保存领域具有良好的应用前景。