摘要:

Abstract –Chlorhexidine gel was applied interproximalJy with the intent to reduce Streptococcus mutans at these sites. Bacterial samples, were obtained using toothpicks, which were inserted in eachinterproximal space and then immediately pressed against agar plates, selective for S. mutans. Duplicate bacterial samples of non‐treated subjects showed that this method gave reproducible results. Using a split mouth technique, 10 subjects were exposed to short term chlorhexidine exposures of varied intensity. At the baseline sampling about 90% of the sites showed growth of S. mutans. One week after the chlorhexidine applications about 55% were infected. After 40 d S. mutans were back to about baseline levels except for the most intensively treated interproximals, which showed 75% infected sites. Thus, at many sites the reduction of S. mutans was only transient. Four subjects with more than 1 million S. mutans per ml saliva participated in a study where salivary andinterproximal levels of S. mutans were compared after a rinsing period with chlorhexidine lasting for 2 weeks. The effect of the rinses varied individually, but it was noted that several inter proximal spaces could be infected, even if the saliva numbers did not reach detectable levels of S. mut

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00757.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The effect of topical application of a fluoride‐containing varnish, Duraphat®, on the level of Streptococcus mutans in saliva and in dental plaque was investigated in schoolchildren. Samples of saliva and pooled buccal plaque were taken before varnish application and 4, 10 and 21 d after treatment. Fluoride varnish treatment with or without a preceding dental prophylaxis had no significant effect on the plaque and salivary levels of S. mutans. The findings suggest that the caries‐reducing effect of fluoride varnish cannot be explained by an alteration of the incidence of 5. mutans in dental plaque or in

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00758.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Stored aqueous solutions of SnF2showed a reduced effect on plaque acidogenicity after 24 weeks, this being paralleled by reduced concentrations of Sn2+and lowered pH. The plaque inhibiting effect was, however, maintained unchanged, indicating a different mechanism for this activity. Stored solutions caused a yellow dental stain probably consisting of SnS

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00759.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The prevalence of oral melanin pigmentation was studied in a population of 30 118 adult individuals in Sweden. Among these, 9.9% showed melanin pigmentation in the oral mucosa. The anterior labial gingiva in the mandible was the most frequently pigmented location. The presence of melanin pigmentation was positively correlated to tobacco smoking. Among tobacco smokers 21.5% were pigmented as compared to 3.0% among individuals not using tobacco. The smoking‐rdated oral pigmentation, smokers' melanosis, could thus be calculated at a prevalence of 18.5% among smokers and the total frequency of smokers' melanosis was calculated at 6.8%. The prevalence of pigmentation was found to increase promninendy during the first year of smoking but aiso to decrease to the level found among non‐tobacco users about 3 years after cessation of smoking. Snuff dipping did not significandy elevate the prevalence of oral melanin pigment

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00760.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Saliva analysis, sialography and histopathologic examination of labial salivary glands were performed on patients with oral lichen planus. Diseases connected with salivary gland function were also recorded. Saliva analysis regarding secrection rate, pH and buffer capacity in unstimulated and stimulated saliva was permormed on 39 patients. 87% of the patients exhibired a low or very low unstimulated secretion rate, the mean value being 0.14 ml/min. The rate of stimulated saliva, pH and buffer capicity did not deviate from normal reference values. Sialographic examination was performed on 18 patients, corresponding to 36 major salivary glands. Radiologic changes were seen in 89% patients. Histopathologic examination was performed on 15 patients. Lymphocytic infiltration, acinar atrophy, fibrosis, fatty degeneration or ducral changes were observed in the minor glands of all patients. Different degrees of acinar atrophy were present in 93% of the patients. Lymphorytic infiltration was seen in 12 patients (80%) of whom three exhibited focal accumulation as in Sjögren's syndrome. Since decreased salivary secretion and symptoms of joint diseases and keratoconjunctivitis sicca were frequently present, over a third of the patients showed clinical signs comparable to those of Sjögren's syndrome. A high frequency of gastrointestinal and endocrine diseases was also recorded, which suggests that a general exo and endocrine influence may be present in patients with oral lichen pla

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00761.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The approximat bone loss of the mandibuLar canines and incisors was scored with two different units of measurement on 30 sets of standardized paralleling radiographs: 1) with absolute values (“true” millimeter) unrelated to casual variables and 2) with relative values (i.e. percentage of the root length).Absolute bone loss scoresrevealed that the space between the canines and the lateral incisors of the present material seemed to be more susceptible to bone loss than the spaces between the incisors, with a tendency towards the mesiai bone loss of the canines being still greater than the distal bone loss of the laterals. There was a high degree of correspondence between absolute bone loss scores at different teeth and corresponding gingival pocket depths of a previous analysis by the present authors.Relative bone loss scoresled to divergent and partly direct‐opposite results compared with the absolute scores. The correspondence between percentage bone loss scores and gingival pocket depths at corresponding tooth surfaces was poor. When investigating the susceptibility of different teeth to periodontal breakdown it seerns as if bone loss should be expressed in absolute values in the same way as are gingival pocket depths and loss of attachment. If a common standard is being used the results of different investigations may be compared. However, when studying the inception and advancement of the disease at the same tooth over a period of time, or when evaluating the remaining bone support the percentage bone loss method may be of clinical imp

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00762.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –A new instrument has been developed suitable for making measurements of the potential and the polarization resistance of the metallic restorations in the oral cavity. An improved measuring electrode has been constructed. The equipment is convenient in clinical routine measurement

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00763.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The release of cobalt from a cobalt chromium alloy construction with a major palatal connector (palatal strap) in the maxilla was determined for 10 test subjects. The concentration of cobalt in unstimulated whoie saliva and tongue scrapings was estimated 21, 14 and 7 di respectively before and 1,2, 3, 10, 20 and 30 d after insertion of the cobalt chromium alloy construction. The method used to quantify the cobalt content was nameless atomic absorption spectrophotometry (AAS). The results showed that the median cobalt concentration in saliva and tongue scrapings increased after the insertion of the cobalt chromium alloy construction, with the highest values occurring in the first 2 d after insertion. The tongoe scrapings, in general, showed higher cobalt median values than saliva did at all times of estimation. The sampling method described in the present study seems to be useful in long‐term investigations in man, where numerous sample collections in the oral cavity are required in order to determine metal content. The risk of negative biologic effects on the human organism caused by the cobalt released from die alloy is discus

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00764.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The correlation between the wall‐to‐wall polymerization contraction close to the surface and the marginal gap in the deeper parts of chemically cured resin fillings was investigated. The investigation was carried out with fillings placed in non‐etched dentin cavities in extracted human teeth. A negative correlation was found; i.e. the narrower the marginal gap in the upper part of the cavities, the more pronounced the contraction in the deeper parts of the fillings, and vic

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00765.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –It has been hypothesized that the Wallace indentation hardness of smooth surface resins is a factor of prime importance for the abrasion by food of Glass 1 restorations. In the present work factors affecting the hardness of polymers were investigated. In addition the tensile strength of composite resins was measured and related to the catalytic system of the polymer. It was found that for a given composition of the monomer the Wallace hardness number increased with increasing content of inhibitor, decreased with increasing content of peroxide, and was unaffected by changes in the content of amine. The hardness was well correlated with the quantity of double bonds remaining in the polymer. BISGMA‐based polymers showed no variation in hardness when the originating monomer varied with respect to content of a bi‐ or a trifunctional diluting monomer. Light‐polymerized polymers were relatively hard as compared to chemically cured materials of adequate setting time. The tensile strength of composite resins was predominandy determined by the monomer content of peroxide and increased herewith. The tensile strength was well correlated with the quantity of remaining double bonds in the constituting

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb00766.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY