Journal de biologie buccale最新文献_第5页

Chlorhexidine and thymol release from a varnish system. 清漆体系中氯己定和百里香酚的释放。

Journal de biologie buccale Pub Date : 1991-12-01

E D Huizinga, J L Ruben, J Arends

引用次数: 0

Comparison of the effects of four hyperplastic agents on hamster cheek pouch mucosa. 四种增生性药物对仓鼠颊袋黏膜影响的比较。

Journal de biologie buccale Pub Date : 1991-12-01

B H Shearer, M D McMillan, H F Jenkinson

引用次数: 0

In vitro penetration of 125I-amelogenin into the enamel and enamel organ of rat incisors. 125i -淀粉原蛋白体外渗透大鼠门牙牙釉质及牙釉质器官的研究。

Journal de biologie buccale Pub Date : 1991-12-01

G Blumen, C Robinson, J Merzel, T L Barrichello

{"title":"In vitro penetration of 125I-amelogenin into the enamel and enamel organ of rat incisors.","authors":"G Blumen, C Robinson, J Merzel, T L Barrichello","doi":"","DOIUrl":"","url":null,"abstract":"This work attempted to introduce pre-labelled intact amelogenins into developing rat enamel in vitro. The intention was ultimately to trace the fate of such proteins in the developing enamel matrix and to examine the effect of these and other molecules on ameloblast behavior. The penetration of 125I-amelogenin (25 KDa) directly into the young enamel of rat incisors, in vitro, keeping the enamel organ intact is described. The enamel (an extension approximately 8 mm from the apical end of the tooth) together with the enamel organ, was separated from the underlying dentine and placed over a strip of filter paper covering a well of micro-culture slide filled with Eagle's medium containing 125I labelled amelogenin and incubated at 37 degrees C. The enamel faced the strip of filter paper and so was adjacent to the medium. After 1 h pieces were either washed in cold medium, fixed and embedded in Epoxy-resin, or incubated in cold medium for another 1 to 10 h at 37 degrees C before embedding. One-micron thick sections were processed for autoradiography and the results showed a decreasing gradient of silver grain concentration from the dentino-enamel junction towards the enamel organ. It is expected that by determining the nature of the labelled material incorporated into the enamel and enamel organ the fate of amelogenins could be better understood.","PeriodicalId":75983,"journal":{"name":"Journal de biologie buccale","volume":"19 4","pages":"305-8"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12952944","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

Bacterial invasion of periodontal tissues after experimental immunosuppression in rats. 实验性免疫抑制后大鼠牙周组织的细菌侵袭。

Journal de biologie buccale Pub Date : 1991-12-01

J Hemmerle, R M Frank

{"title":"Bacterial invasion of periodontal tissues after experimental immunosuppression in rats.","authors":"J Hemmerle, R M Frank","doi":"","DOIUrl":"","url":null,"abstract":"A moderate gingivitis was produced in 3 groups of 10 adult Wistar rats with diet 2000 of Keyes and Jordan (1964) delivered for 30 days with a controlled feeding unit. The first group served as untreated control. The second group received 5 intraperitoneal injections of cyclosporine A (15 mg/kg body weight) from day 20 to 30 to interfere with the activation of T lymphocytes and interleukin synthesis. The third group received 2 intraperitoneal injections of cyclophosphamide (100 mg/kg on day 20 and 25) which induced a severe neutropenia. The gingival areas between the upper molar regions were prepared for light and transmission electron microscopy. In the untreated control group, a layer of polymorphonuclear neutrophils (PMN) was observed between the dental plaque and the junctional epithelium with a round cell infiltration in the superficial connective tissue. No bacterial invasion was observed. In the cyclosporine group, despite the action on T lymphocytes, no bacterial invasion occurred, but a differentiated PMN layer was present between the apical dental plaque and the junctional epithelium. In the cyclophosphamide group an important bacterial invasion was observed in the interdental epithelium as well as in the underlying connective tissue. In the local absence of PMNs, a mixed flora of Gram positive and negative bacteria of various shapes invaded epithelial as well as connective tissue cells and came in contact with the alveolar crestal bone. Resorption of the alveolar crestal bone scored according to the Keyes and Gold method (1955) was significantly more important in the cyclosporine and the cyclophosphamide group when compared to the controls (p less than 0.05). No statistical difference in bone resorption was noted between the cyclosporine and the cyclophosphamide groups. It can be concluded that the PMN layer constitutes the first line of defense opposed to bacterial invasion of the periodontal tissues.","PeriodicalId":75983,"journal":{"name":"Journal de biologie buccale","volume":"19 4","pages":"271-82"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12953050","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

Age reference charts of tooth length in Dutch children. 荷兰儿童牙长年龄参考图。

Journal de biologie buccale Pub Date : 1991-12-01

C E Carels, A M Kuijpers-Jagtman, F P van der Linden, M A Van't Hof

引用次数: 0

A scanning electron microscopic study of the enamel of neonatal teeth. 新生儿牙釉质的扫描电镜研究。

Journal de biologie buccale Pub Date : 1991-12-01

J R Jasmin, S Clergeau-Guerithault

引用次数: 0

[Dental delay and microdontia in children with somatotropin hormone deficiency]. [生长激素缺乏症儿童牙齿发育迟缓和小牙畸形]。

Journal de biologie buccale Pub Date : 1991-12-01

L Bigeard, J Sommermater

引用次数: 0

[A comparative study of the in vitro biocompatibility of 2 root canal sealing cements]. [2种根管密封胶合剂的体外生物相容性比较研究]。

Journal de biologie buccale Pub Date : 1991-09-01

J Camps, I Abou Haschieh, S Mathieu, E J Proust

引用次数: 0

[The distribution and prevalence of Haemophilus actinomycetemcomitans in the oral cavity]. [口腔放线菌嗜血杆菌的分布和流行]。

Journal de biologie buccale Pub Date : 1991-09-01

M Sixou, D Duffaut-Lagarrigue, J P Lodter

{"title":"[The distribution and prevalence of Haemophilus actinomycetemcomitans in the oral cavity].","authors":"M Sixou, D Duffaut-Lagarrigue, J P Lodter","doi":"","DOIUrl":"","url":null,"abstract":"The prevalence and distribution of Haemophilus actinomycetemcomitans (H.a.) were studied in 3292 specimens of subgingival plaque on the four subgingival aspects of all teeth of the dental arch, 150 specimens from the mucosal surface (tongue and cheek) and 30 saliva specimens in 30 subjects. The sample population of 30 subjects was subdivided into three groups: 10 normal subjects, 10 subjects with localised juvenile periodontitis (SLJP) and 10 subjects with adult chronic periodontitis (SACP). The prevalences of H.a. in subgingival areas of each group mentioned were 30%, 90% and 60% respectively. Scores for prevalence obtained with other types of specimens proved to be lower except for saliva specimens which appear to be a less representative marker of subgingival prevalence of H.a.. Histograms for the distribution of H.a. revealed a predominance of this microorganism on the proximal surface of molar teeth in the three groups of patients. Only the SLJP also exhibited a high prevalence on the proximal aspect of the incisor teeth. The wide distribution of H.a. in all of the clinical groups studied suggests that this bacterium is not a good marker of periodontal disease and that it is necessary to define the most characteristic phenotypes and genotypes.","PeriodicalId":75983,"journal":{"name":"Journal de biologie buccale","volume":"19 3","pages":"221-8"},"PeriodicalIF":0.0,"publicationDate":"1991-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13097974","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

Surface studies on titanium IMZ implants. 钛IMZ种植体的表面研究。

Journal de biologie buccale Pub Date : 1991-09-01

M Kuliralo, J J Pireaux, R Caudano, E N Dourov

{"title":"Surface studies on titanium IMZ implants.","authors":"M Kuliralo, J J Pireaux, R Caudano, E N Dourov","doi":"","DOIUrl":"","url":null,"abstract":"The aim of this study was to investigate the surface feature of the IMZ implant. Eight non-implanted new samples and four implanted samples removed one year after insertion were prepared. The 8 non-implanted samples were divided into two groups. The first group was sterilized and the second group was manipulated by bare hands. The implanted samples underwent a careful procedure to recover the metal surface. Then, both the non-implanted new samples and implanted samples were subjected to X-ray electron spectroscopy (XPS) and Rutherford back-scattering spectroscopy (KBS) analyses. Subsequently, all the samples were subjected to scanning electron microscopic (SEM) examination, and surface roughness and profilometric measurements. The SEM photomicrograph showed a rough surface composed of fused granular metal separated by gaps. Sometimes the presence of isolated well-shaped granules of 0.8-1.8 microns in diameter was observed. This structure was related to the manufacturing process of the IMZ implant. The implanted surfaces showed no intergranular gaps and appeared less rough (average roughness: Ra = 1.91 +/- 0.1 microns) compared with the new non-implanted surfaces (Ra = 4.93 +/- 0.3). XPS analysis at a maximum resolution depth of 1.5 nm revealed TiO2, C, O compounds on sterilized non-implanted surfaces. The hand-handled non-implanted surfaces on the contrary did not show TiO2 due to contamination. The elements Ca, C, O and N were found on the one-year implanted IMZ surfaces; TiO2, however, was absent. RBS analysis at a maximum resolution depth of 1000 nm, indicated a decrease of the total thickness of TiO2 after one year of IMZ implantation. The TiO2 thickness was 0.5-0.7 microns for the non-implanted new IMZ surfaces and 0.03-0.2 microns for implanted IMZ surfaces.","PeriodicalId":75983,"journal":{"name":"Journal de biologie buccale","volume":"19 3","pages":"247-53"},"PeriodicalIF":0.0,"publicationDate":"1991-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13097978","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