摘要:

Summary.This is a review of methods of assessing dental pulp vitality in order to assist the clinician in diagnosis and treatment planning. It covers the patient's history, clinical examination, assessment of radiographs, thermal tests, electrical tests, test cavities, use of anaesthesia, and the recent application of laser Doppler flowmetry.

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00843.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.Cultures of human oral buccal mucosa fibroblasts and human tooth pulp fibroblasts were established and grown under standard routine conditions. The biological characteristics of cell proliferation, growth pattern, cell morphology and enzyme release (lactate dehydrogenase and acid phosphatase) were studied.Under the same standardin vitroconditions the two cell types demonstrated different growth patterns and different levels of enzyme activity.It is suggested that differences in biological characteristics should be considered when selecting appropriate cells for lexicological studies of dental materials.

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00844.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.Zinc, which is present in many materials used in dentistry, including restorative and endodontic materials and mouthwashes, is reputedly bactericidal. However, the addition of this element at concentrations in the range 10–50 ppm to cultures ofStreptococcus sanguis(NCTC 7864) stimulated the growth of the micro‐organism relative to that of controls. A second antibacterial element, namely fluoride, reduced growth. Similar results were obtained whether the organism was grown aerobically or anaerobically. In view of the susceptibility of some organisms to zinc, the results of this study may help to explain conflicting reports in the literature; the results will vary depending on which organism is predomin

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00845.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.This study used as endodontioc model to investigate the effect of glove wearing on tactile sensitivity. Dental students, all of wham had worn gloves throughout their clinical training, used a file to detect resistance at the apical end of an endodontic teaching aid. Wearing gloves produced a statistically significant reduction in tactile sensitivity. As large intra‐ and inter‐subject variations were observed both with and without gloves, the sensitivity change brought about by the wearing of the latter seems unlikely to be of significance in clinical endodon

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00846.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.Microflora from root canals and periodontal pockets of periodontally affected were compared in order to elucidate the as yet unknown relationship between pulpal and periodontal disease.Caries‐free teeth affected with advanced periodontitis and diagnosed as clinically dead by electric pulp testing were selected. The root canals and periodontal pockets were sampled, and the bacterial flora examined by both culture and interference microscopy. The results indicated that the aerobe/anaerobe ratio in the periodontal pocket was 0.23, while it was 0.0022 in the root canal, the large predominance of morphotypes in the two sites. Results of anaerobic culture demonstrated a significantly higher rate of detection of facultativeStreptococcusbacteria in the periodontal pocket than in the root canal.The predominant bacterial species common to both regions wereStreptococcus, Peptostreptococcus, Eubacterium. Bacteroides, andFusobacteriumfor obligate anaerobes. As for facultative anaerobes,ActinomycesStreptococcuswere detected predominantly in the periodontal pocket. The occurrence of micro‐organisms common to both sites in this study suggests that the periodontal pocket may be a possible source of root canal infecti

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00847.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.The efficacy of low temperature (70°C) thermoplasticized gutta‐percha used to seal root canals by the retrograde approach following apicectomy was assessed. A dye leakage technique was used, and gutta‐percha was compared with amalgam. Two groups of different sized roots were apicected, and their root canals instrumented and filled conventionally with laterally condensed gutta‐percha. Each group was randomly divided into four sub‐groups; one was the control group in which no further treatment was carried out. In the other three groups the apical 3 mm of gurta—percha was removed, and the apical cavities filled as follows: group I with 70°C thermoplasticized gutta‐percha with sealer; group II with 70°C thermoplasticized gutta‐percha without seaier; group III with amalgam. The roots were rendered transparent by acid demineralization, and maximum dye penetration was measured. The results showed statistically significant ranking of leakage between the four sub‐groups: 70°C thermoplasticized gutta‐percha with sealer 70°C thermoplasticized gutta‐percha without sealer amalgam control. The larger canals in all four sub‐groups also exhibited significantly greater lea

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00848.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Summary.The present investigation was designed to study the effect of clindamycin on root canal infection when placed as an intracanal dressing. Twenty‐five teeth with necrotic pulps and periapical radiolucencies were included. Following initial bacteriological sampling and routine instrumentation, clindamycin powder mixed to a paste with saline was applied for 14 days. The presence or absence of bacteria was determined in samples taken immediately after removal of the dressing, and after a period of 7 days during which the canals were filled with sampling fluid. Bacteria were recovered from four and six teeth respectively. The results indicated that clindamycin offered no advantage over conventional root canal dressings, such as calcium hydroxide, and it is therefore not recommended for use in routine endodontic therap

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00849.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00850.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00851.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0143-2885    

DOI:10.1111/j.1365-2591.1990.tb00852.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY