摘要:

Changes in the utilization of dental services by the adult Finnish population were studied by reanalyzing the data from a nationwide study carried out in 1971 and by comparing those results with the data from an interview study of 581 persons carried out in 1980. In 1971, 56% of the interviewees had visited a dentist within the last 12 months. The corresponding percentage was 54% in 1980. The most common reason for the latest dental visit was routine examination in 1980, and only 4% of the interviewees had been recalled by the dentist. However, the recall system, when explained, was regarded as acceptable and practical by the vast majority of the interviewees. In 1971 utilization study found that the interviewees had a positive attitude toward dental health education. Likewise, the majority of interviewees in 1980 expressed a wish to keep their own teeth for their lifetime.

ISSN:0001-6357    

DOI:10.3109/00016358309162304

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

The amounts of cobalt and chromium released to the saliva in individuals wearing cobalt-chromium partial dentures have been measured. Saliva was collected during a 5-min period, both with and without dentures in the mouth, and the two samples compared. More than 80% of the 30 cases showed increased amounts of metals with the denture in the mouth. Newer and larger dentures liberated more than did older and smaller ones. The median increase in chromium was approximately twice that of cobalt.

ISSN:0001-6357    

DOI:10.3109/00016358309162305

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

175‘epulides’were studied clinically and histologically. The lesions were histologically reclassified into three groups: granulomatous, fibromatous and giant cell lesions. The granulomatous group was four times and the giant cell group 1.5 times more frequent in females. It is suggested that the expression epulis should be abandoned as a microscopic designation for lesions in the oral mucosa, as it is only a non-specific topographico-clinical concept comprising histogenetically and histomorphologically differing lesions and therefore does not represent a uniform group. The suggested new terms for the three types of hyperplastic lesions areoral mucosal granulomatous hyperplasias(including such diagnostic terms as granulomatous gingivitis, gingivitis of pregnancy, granuloma gravidarium, pyogenic granuloma, epulis angiomatosa and epulis telangiectaticum),oral mucosal fibrous hyperplasias(including such diagnostic terms as fibrous epulis, epulis fissuratum, fibroepithelial lesions, denture injury tumor and peripheral odontogenic fibroma) andoral mucosal giant cell hyperplasia(including such diagnostic terms as peripheral giant cell granuloma and giant cell epulis).

ISSN:0001-6357    

DOI:10.3109/00016358309162306

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

Extrinsic discoloration of teeth has frequently been observed in connection with the use of chemical plaque-preventive agents. Preliminary investigations have indicated that oxidizing peroxymonosulfate may effectively reduce this discoloration without interfering with the plaque-preventive capacity of chlorhexidine. In the present experiment a 0.2% chlorhexidine and a 1% peroxymonosulfate solution were used for oral rinsing in a group of 50 military recruits. A double-blind experimental design was followed. The plaque-preventive capacity of chlorhexidine was maintained, and a marked reduction in extrinsic tooth discoloration could be observed.

ISSN:0001-6357    

DOI:10.3109/00016358309162307

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

The efficacy of a protease preparation (Alcalase®, Novo, Denmark) in preventing accumulation of plaque on the fitting surface of complete upper dentures was examined in a double-blind study. Seventeen denture wearers with clinically healthy oral mucosae participated in the study. The protease was dispensed in dissolvent tablets containing 15, 30, 60, 100, 300, 500, or 1000 mg of the enzyme. Enzyme tablets or placebo tablets were dissolved in 150 ml water at 50°C, and the dentures were soaked once daily for 15 min. Denture soaking was performed with or without brushing. The study consisted of 14 1-week periods. At the start of each period the dentures were cleaned by brushing until they showed no visible plaque after staining. At the end of each period plaque was stained and the dentures were photographed. The photographs were projected, and the percentage area of the fitting surface showing plaque deposits was scored with 10% intervals. Statistical analysis showed that there was a significant reduction of plaque scores with increasing enzyme concentration. The most marked reduction in plaque formation was seen when mechanical cleansing was combined with immersion in a 500-mg enzyme solution. At a concentration of 300 mg (or more) the enzyme immersion was as efficient as mechanical cleansing in preventing denture plaque accumulation.

ISSN:0001-6357    

DOI:10.3109/00016358309162308

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

The morphology of the subodontoblastic region in the human dental pulp was analysed using the freeze-fracturing technique. Multiple areas of focal intercellular junctions were found between subodontoblastic fibroblasts (or Höhl's cells). The connections were of the gap junction type. Similar junctions were observed between subodontoblastic cells and small-calibre (0.10–0.20μm) fibres, presumably nerves. Tight junctions were not observed.

ISSN:0001-6357    

DOI:10.3109/00016358309162309

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

Several physical properties such as strength (UTS and fracture and proof stress), modulus of elasticity, strain (elastic and plastic elongation), hardness, and hardening ability were determined for five low-gold alloys and two conventional gold casting alloys (types III and IV). The composition and the structure (pores and defects) of the cast tensile test specimens were also studied. The results showed that alloys with a low content of noble metals could have properties comparable to those of the traditional types III and IV dental gold casting alloys. A marked difference was seen in the plastic elongation (ductility). A great number of defects (pores and oxide inclusions) were also observed, especially in the specimens with a high content of both palladium and silver.

ISSN:0001-6357    

DOI:10.3109/00016358309162310

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

Root resorption of replanted teeth is dependent on the duration of the extra-alveolar period and on the storage environment. In the present investigation the significance of preserving the humidity of the periodontal ligament (PDL) during the extra-alveolar period was tested on isolated PDL cells and on replanted monkey teeth. The isolated PDL cells were tested with respect to cell viability (trypan blue exclusion test) and to cell recovery (number of cells after additional cultivation). About 70% of the cells were viable and 44% recovered after 1 h in a humid atmosphere. Practically no cells were viable or recovered after 1 h of drying. Replanted teeth that had been wrapped in plastic foil for 1 h before replantation showed no more resorption than immediately replanted teeth. This is in contrast to teeth dried in air for 1 h before replantation. They showed extensive root resorption on almost all root surfaces. Thus, prevention of evaporation of tissue fluid from the PDL must be considered a primary goal if the tooth cannot be replanted immediately.

ISSN:0001-6357    

DOI:10.3109/00016358309162311

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

The application of an immunoperoxidase method to labeling ofStreptococcus mutanssubsp.sobrinusfor scanning electron microscopy is described. Bacteria from four separate cultures were fixed in 2.5% buffered glutaraldehyde solution. The specimens were treated in accordance with an indirect immunolabeling procedure using a rabbit anti-S. mutanssubsp.sobrinusγ-globulin. Labeled bacteria were equipped with a layer of small, distinct globules of horseradish peroxidase reaction product. Bacteria exposed to control incubations were not equipped with this layer.

ISSN:0001-6357    

DOI:10.3109/00016358309162312

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor