Scandinavian journal of dental research最新文献

The plasminogen-activating system in gingival fluid from adults. An intra-individual study before and after treatment of gingivitis. 成人牙龈液中纤溶酶原激活系统。牙龈炎治疗前后的个体研究。

Scandinavian journal of dental research Pub Date : 1994-12-01

B Kinnby, L Matsson, I Lecander

{"title":"The plasminogen-activating system in gingival fluid from adults. An intra-individual study before and after treatment of gingivitis.","authors":"B Kinnby, L Matsson, I Lecander","doi":"","DOIUrl":"","url":null,"abstract":"High concentrations of tissue plasminogen activator (t-PA) and placental type plasminogen activator inhibitor (PAI-2) have previously been found in gingival crevicular fluid (GCF) of adults and children. In the present study, intra-individual comparisons were made of the concentrations of t-PA, urokinase type plasminogen activator (u-PA), PAI-1, and PAI-2 in GCF from the same sites before and after periodontal treatment in eight healthy male volunteers aged 35-46 yr. The gingival state was assessed by exudate measurement, bleeding on standardized probing, and the gingival index of Löe & Silness 3 days before the start of the trial and on the day after completing a 21-day preventive program consisting of instruction and professional cleaning once a week. Eight sites per subject were selected for enzyme analyses, all showing improvement in gingival state during the period. Sampling of GCF at the start and at the end of the trial was done with small disks of Millipore-filter. t-PA and PAI-2 were analyzed with enzyme-linked immunosorbent assays with low method errors. The mean concentrations of t-PA were 0.73 mg/l before treatment and 0.49 mg/l after treatment. The mean concentrations of u-PA were 84.4 micrograms/l before treatment and 101.6 micrograms/l after treatment. PAI-1 was found in three subjects at the detection level. The mean PAI-2 concentrations were 2.19 mg/l before and 1.13 mg/l after treatment. The mean molar ratio PAs/PAI-2 was 0.47 before and 0.48 after treatment. This insignificant change implies a maintained proteolytic balance and indicates that PAI-2 is an important inhibitor of tissue proteolysis.","PeriodicalId":21511,"journal":{"name":"Scandinavian journal of dental research","volume":"102 6","pages":"334-41"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18870871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parathyroid hormone and enamel formation in rat maxillary incisors. 甲状旁腺激素与大鼠上颌门牙牙釉质形成的关系。

Scandinavian journal of dental research Pub Date : 1991-04-01

L Ranggård, J G Norén, C Engström

引用次数: 0

Microbial aspects of frequent intake of products with high sugar concentrations. 微生物方面的经常摄入产品的高糖浓度。

Scandinavian journal of dental research Pub Date : 1989-04-01

J Carlsson

{"title":"Microbial aspects of frequent intake of products with high sugar concentrations.","authors":"J Carlsson","doi":"","DOIUrl":"","url":null,"abstract":"The Vipeholm Study showed that a frequent intake of products with high sugar concentrations increases caries activity. This effect of sugar was explained by the acid production of bacteria on the teeth. In the following 40 yr many microbial characteristics have been described, which are important in the pathogenesis of dental caries. This contribution focuses on one characteristic of the cariogenic bacteria; their acidurance. Compared to other oral bacteria the cariogenic lactobacilli and mutans streptococci have enzymes with greater resistance to acid, and greater capacities of the cells to extrude protons from the cytoplasm. The most important enzyme for the extrusion of protons is a membrane-bound proton-translocating ATPase. This enzyme is found in higher amounts and is working at lower pH in the cariogenic bacteria. Another important characteristic of the cariogenic bacteria is their production of lactic acid when they are exposed to high concentrations of sugar. Lactic acid has a pK of 3.8, while other carboxylic acids have a pK of 4.8. The bacterial cell membrane is permeable to undissociated carboxylic acids. These undissociated acids act as carriers to bring protons back into the cytoplasm. Bacteria with lactic acid as fermentation product have therefore the possibility to grow and produce acids at one pH unit lower than bacteria with, for example, acetic, propionic, or butyric acid as fermentation product.","PeriodicalId":21511,"journal":{"name":"Scandinavian journal of dental research","volume":"97 2","pages":"110-4"},"PeriodicalIF":0.0,"publicationDate":"1989-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13791322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromatographic separation of alkaline phosphatase from dental enamel. 牙釉质碱性磷酸酶的色谱分离。

Scandinavian journal of dental research Pub Date : 1989-02-01

D Moe, S Kirkeby, E Salling

引用次数: 0

Formation and early prenatal location of the human mental foramen. 人类精神孔的形成和早期产前定位。

Scandinavian journal of dental research Pub Date : 1989-02-01

I Kjaer

引用次数: 0

Effect of the antineoplastic agents doxorubicin and methotrexate on rat caries and secondary dentin formation. 抗肿瘤药物阿霉素和甲氨蝶呤对大鼠龋齿和继发牙本质形成的影响。

Scandinavian journal of dental research Pub Date : 1989-02-01

U Pajari

引用次数: 0

Long-term retention of TiF4 and SnF2 after topical application to dentin in dogs. 犬牙本质外用后TiF4和SnF2的长期保留。

Scandinavian journal of dental research Pub Date : 1988-12-01

A B Tveit, B Klinge, B Tötdal, K A Selvig

{"title":"Long-term retention of TiF4 and SnF2 after topical application to dentin in dogs.","authors":"A B Tveit, B Klinge, B Tötdal, K A Selvig","doi":"","DOIUrl":"","url":null,"abstract":"As part of an evaluation of the potential of topical application of TiF4 in the prevention or arrest of root caries, the longevity of the titanium-rich glaze and the long-term retention of titanium and fluoride in exposed dentin surfaces were examined in dogs. For comparison, the effect of fluoride in combination with another cation, tin, was studied as well. Facets of exposed dentin were prepared in two beagles and treated for 1 or 4 min with either a TiF4 or an SnF2 solution (1.1 M F, native pH). After 3, 7, or 21 wk, the experimental surfaces were analyzed for fluoride, titanium, tin, and calcium using an electron microprobe. Dentin surfaces treated with TiF4 for 1 min showed fluoride concentrations ranging from less than 0.15% to 1.03%, while those treated for 4 min with SnF2 showed values from 0.22% to 1.28%. The calcium analyses revealed partial surface demineralization in one half of the SnF2-treated specimens, while this was a rare finding in the TiF4 group. The findings show that a brief application of TiF4 to exposed dentin results in approximately the same increase in fluoride content as a 4-min application of SnF2, with, however, less surface demineralization. In addition, the presence of a surface glaze may impart an added benefit to the use of TiF4 as a topical agent in the prevention of root caries.","PeriodicalId":21511,"journal":{"name":"Scandinavian journal of dental research","volume":"96 6","pages":"536-40"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14336614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A 10-year follow-up study of the masticatory system after treatment with osseointegrated implant bridges. 骨整合种植体桥治疗后咀嚼系统的10年随访研究。

Scandinavian journal of dental research Pub Date : 1988-06-01

T Haraldson, G Zarb

引用次数: 0

Reliability of the periapical index scoring system. 根尖周指数评分系统的可靠性。

Scandinavian journal of dental research Pub Date : 1988-04-01

D Orstavik

引用次数: 0

Biophysical and microbiologic studies of "heavy" and "light" plaque formers. “重”和“轻”斑块形成的生物物理和微生物学研究。

Scandinavian journal of dental research Pub Date : 1987-02-01

T Simonsson, S Edwardsson, P O Glantz

{"title":"Biophysical and microbiologic studies of \"heavy\" and \"light\" plaque formers.","authors":"T Simonsson, S Edwardsson, P O Glantz","doi":"","DOIUrl":"","url":null,"abstract":"In order to trace factors possibly influencing initial bacterial colonization of tooth surfaces, a multiple linear regression analysis was performed on the present results as well as on those from certain clinical and biochemical studies previously performed in the same subjects. No statistically significant differences were observed between the two groups of plaque formers for the individual parameters. The multiple regression analysis showed, however, that the calculated work of adhesion for two polar and one non polar test liquid, the rate of unstimulated salivary secretion, morphologic differences in the dento-gingival areas of maxillary premolars and saliva-induced aggregation of S. mitior were crucial for about 90% of the variation in the number of CFU colonizing tooth surfaces after both 2 and 6 h. Both electrostatic and van der Waal's forces, as well as salivary flow conditions could thus have influenced the initial attachment of bacteria to the test surfaces. It is concluded that saliva including its suspended microorganisms could be looked upon as being a colloidal biological system, and if so, the initial bacterial colonization of tooth surfaces should follow known, general biophysical laws.","PeriodicalId":21511,"journal":{"name":"Scandinavian journal of dental research","volume":"95 1","pages":"43-8"},"PeriodicalIF":0.0,"publicationDate":"1987-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14594652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0