共查询到20条相似文献,搜索用时 15 毫秒
1.
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。 相似文献
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Purpose: The effective biomarkers related to diagnosis metastasis drug resistance irradiation sensitivity of oral cancers will help the pathologist oncologist to determine the molecular taxonomy diagnosis design the individualization treatment for the patients with oral cancers.…… 《中国口腔颌面外科杂志》2008,6(Z1):13-14
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. 相似文献
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Computerized tomography 《中国口腔颌面外科杂志》2008,6(Z1):43
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. 相似文献
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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. 相似文献
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. 相似文献
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Purpose: Venous malformations are common vascular anomalies with a propensity of the head neck. Intralesional injection of Pingyangmycin 《中国口腔颌面外科杂志》2008,6(Z1):55
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. 相似文献
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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。 相似文献
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G. Paris O. Martinaud A. Petit A. Cuvelier D. Hannequin P. Roppeneck E. Verin 《Journal of oral rehabilitation》2013,40(3):199-204
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. 相似文献
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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。 相似文献
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Wayne F. Yakes 《中国口腔颌面外科杂志》2008,6(Z1)
Interventional radiology and interventional neuroradiology are evolving specialties which can aid the head and neck surgeons in the clinical management of patients with complex vascular lesions. 相似文献
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The use of bone containing vascularized flaps has become the gold standard in the reconstruction of composite post ablative palato-maxillary defects.…… 《中国口腔颌面外科杂志》2008,6(Z1):29
The use of bone containing vascularized flaps has become the gold standard in the reconstruction of composite, post ablative palato-maxillary defects. 相似文献
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目的:探讨小剂量短疗程泼尼松治疗顽固性复发性阿弗他溃疡(顽固性RAU)的临床疗效及对免疫指标调节的作用。方法:选择37例顽固性RAU的患者,小剂量短疗程口服泼尼松治疗1个月,前20 d 10 mg/d,之后5 d减量为7.5 mg/d,最后5 d减量为5 mg/d,治疗前后检查血常规、肝肾功能、外周血体液和细胞相关免疫指标,观察治疗1个月、停药2个月后临床疗效及不良反应,治疗1个月后免疫指标改变。结果:小剂量短疗程口服泼尼松治疗顽固性RAU的治疗1个月后总有效率为100%,停药2个月后总有效率为91.4%,治疗1个月后外周血免疫球蛋白及补体(IgG、IgA、IgM、IgE和C4)水平降低(P<0.05),免疫细胞(B、T淋巴细胞及NK细胞)比例未出现明显差异。结论:采用小剂量短疗程泼尼松治疗顽固性RAU有较好的疗效,可延长溃疡发作间歇期,降低溃疡发作的数目、面积及疼痛程度,未见不良反应的发生。调节体液免疫可能是泼尼松治疗顽固性RAU的途径之一。 相似文献
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In a matter of a few days the murine tooth germ develops into a complex, mineralized, structure. Murine 30K microarrays were used to examine gene expression in the mandibular first molar tooth germs isolated at 15.5dpc and at 2DPN. Microarray results were validated using real-time RT-PCR. The results suggested that only 25 genes (3 without known functions) exhibited significantly higher expression at 15.5dpc compared to 2DPN. In contrast, almost 1400 genes exhibited significantly (P<0.015) higher expression at 2DPN compared to 15.5dpc, about half of which were genes with unknown functions. More than 50 of the 783 known genes exhibited higher than 10-fold increase in expression at 2DPN, amongst these were genes coding for enamel matrix proteins which were expressed several 100-fold higher at 2DPN. GO and KEGG analysis showed highly significant associations between families of the 783 known genes and cellular functions relating to energy metabolism, protein metabolism, regulation of cell division, cell growth and apoptosis. The use of bioinformatics analysis therefore yielded a functional profile in agreement with known differences in tissue morphology and cellular composition between these two stages. Such data is therefore useful in directing attention towards genes, or cellular activities, which likely are worthy of further studies as regards their involvement in odontogenesis. 相似文献
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Oral Cancer is a major problem not only in the Indian Subcontinent but also in large areas of South South East Asia where tobacco habits 《中国口腔颌面外科杂志》2008,6(Z1):5
Oral Cancer is a major problem not only in the Indian Subcontinent, but also in large areas of South and South East Asia where tobacco habits (chewing and smoking) are prevalent. 相似文献
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We all know that the development of the sequential therapy ameliorates the clefts treatment. Modes methods of the sequential therapy differ among different countries places because of the differences of economy medical system sanitary status.…… 《中国口腔颌面外科杂志》2008,6(Z1):15
We all know that the development of the sequential therapy ameliorates the clefts treatment. Modes and methods of the sequential therapy differ among different countries and places because of the differences of economy, medical system and sanitary status. 相似文献
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《Orthopaedics and Trauma》2023,37(3):184-194
Knee arthritis occupies a significant proportion of the musculoskeletal burden in the UK. Total knee arthroplasty currently comprises the mainstay of treatment. There has been a shift towards treating isolated unicompartmental osteoarthritis with bone-preserving surgical techniques, in the form of realignment osteotomy or unicompartmental arthroplasty. There are significant data regarding the survivorship of unicompartmental knee arthroplasty from the National Joint Registry data. Similar registry data are not available for osteotomy surgery yet, but the evidence suggests that unicompartmental knee arthroplasty has greater survivorship. Osteotomies can, however, deliver higher functional return. For both techniques to succeed, it is imperative that rigorous surgical decision-making, with regards to patient selection, should be followed. This paper discusses the basis for these principles and their importance in delivering optimal care. Often, these two surgical techniques are promoted as being mutually exclusive; this paper argues that, in fact, they are part of a complementary algorithm that can deliver the best outcome to the appropriately selected patient. 相似文献
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目的:观察放疗对小型猪腮腺、颌下腺、舌下腺的微血管损伤状况。方法:将6只实验用小型猪分为2组。2组动物进行放疗,将双侧腮腺、颌下腺、舌下腺加入放射野中,放疗组20Gy/每侧,对照组0Gy/每侧。放疗结束后4 h处死两组动物,取两组动物腮腺、颌下腺、舌下腺标本行HE染色与CD31免疫组化染色,观察放疗早期3种腺体微血管密度变化。结果:两组小型猪腮腺、颌下腺、舌下腺CD31阳性染色颗粒数有显著差异(P<0.05);3个腺体间统计结果有显著性差异(P<0.05);腮腺与颌下腺及舌下腺有显著性差异(P<0.05),颌下腺与舌下腺无显著性差异。结论:放疗可导致小型猪腮腺、颌下腺、舌下腺微血管密度明显减低,且各腺体间微血管密度减低有差异,腮腺的损伤程度大于颌下腺和舌下腺。 相似文献
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Antioxidants as a novel dental resin-composite component: Effect on elution and degree of conversion
Yang Yang Franz-Xaver Reichl Nicoleta Ilie Jianwei Shi Julia Dhein Reinhard Hickel Christof Högg 《Dental materials》2019,35(4):650-661
Objective
Ascorbic acid (Asc) and N-acetylcysteine (NAC) were reported to reduce genotoxicity induced by dental (co)monomers and their epoxy metabolites. The aim of the present study was to investigate Asc or NAC as novel components in light-curable methacrylate based dental composites regarding their effects on degree of conversion (DC) and elution of composite components. Additionally, the release of Asc or NAC was determined.Methods
Asc or NAC (1, 0.1, 0.01 or 0?wt%) was experimentally incorporated into the composites Venus®, Grandio® and FiltekTM Supreme XTE and polymerized according to the instruction of manufacturers. The samples were elussted in methanol and water. For each composite-antioxidant mixture and elution medium four samples (n?=?4) were prepared. The eluates were analyzed by gas chromatography/mass spectrometry (GC/MS), high-performance liquid chromatography/ultraviolett/diode array detection (HPLC/UV/DAD) and high-performance liquid chromatography/fluorescence detection (HPLC/FLD). DC of composite-antioxidant mixtures was measured in real-time with Fourier transform infrared spectroscopy (FTIR).Results
The highest concentrations of eluted Asc were 313.98?μM (Venus®-1?wt% Asc; 1 day; methanol) and 245.34?μM (FiltekTM Supreme XTE-1?wt% Asc; 5?min; water). The highest concentrations of eluted NAC were 42.99?μM (1 day; Filtek? Supreme XTE-1?wt% NAC; 1 day; methanol) and 108.11?μM (Filtek? Supreme XTE-1?wt% NAC; 7 day; water). Triethylene glycol dimethacrylate (TEGDMA) elution was significantly increased in Venus®-1?wt% Asc and Grandio®-1?wt% Asc (1 day and 7 day methanol/water), compared to control. No significant difference was found for TEGDMA elution in Filtek? Supreme XTE-1?wt% Asc/NAC. DC was significantly decreased compared to control (=?composite without antioxidant) in Grandio® and Filtek? Supreme XTE after 1, 0.1 and 0.01?wt% Asc incorporation and in Venus® after 1 and 0.1?wt% Asc incorporation. For composite-NAC mixtures, only DC of Grandio®-1?wt% NAC was significantly reduced.Significance
Incorporation of NAC (1?wt%), as a novel composite component, into Filtek? Supreme XTE, had no effect on DC and composite component elution, and supplies sufficient amount of antioxidant which may reduce toxicity. Therefore, it represents a beneficial mixture. 相似文献20.
《International journal of oral and maxillofacial surgery》2020,49(9):1202-1209
The aim of this study was to survey an international group of temporomandibular joint surgeons regarding their outcomes with alloplastic total joint replacement in skeletally immature patients and to review the literature linked to autogenous reconstruction and alloplastic replacement of the temporomandibular joint (TMJR) in this population. A total of 24 custom/patient-specific TMJ Concepts devices were implanted into 14 patients (eight male and six female). Their mean age was 14 years (range 7–17 years). Nine (64.3%) had bilateral devices and five (35.7%) had unilateral devices. The most prevalent diagnosis was idiopathic condylar resorption (33.3%), followed by ankylosis (16.7%). Concurrent orthognathic surgery was performed in four patients (28.6%). The TMJR was completed as a one-stage procedure in 11 patients (78.6%) and in two stages in three patients (21.4%). All surgeons reported improvements in maximum incisal opening with good function. The respondents reported no asymmetric mandibular growth or retrognathia after either bilateral or unilateral TMJR implantation. This pilot study indicates that the use of TMJR in the growing patient may be a useful modality in select cases. The encouraging results of experienced surgeons demonstrate and support the need for further studies on the utilization of TMJR in this patient population. 相似文献