摘要:

AbstractThe purpose of the present study was to develop a partial recording system based on the principles of the Extent and Severity Index, aiming at describing the degree of radiographic alveolar bone loss on a population level. The data analyzed were derived from a subject sample comprising 531 individuals aged 25–75 yr. In these subjects alveolar bone level (ABL) was radiographically assessed at all approximal tooth surfaces. An ABL value of>2 mm was required for a tooth site to be included in the computation of a full mouth bivariate Extent and Severity Index (FESI). A partial recording index (PESI‐2) based on 18ad hocselected tooth sites depicted in one periapical and one vertical bitewing radiograph was evaluated in comparison with the FESI as well as with partial recording indices based on the 9 and 18 tooth sites which displayed the highest correlation with full mouth scores (PESI‐9) and PESI‐18, respectively). It was shown that all three partial recording systems generated values reasonably close to the full‐mouth scores. However, the fitness of all partial indices varied with age. The potential of the partial indices to predict full‐mouth scores could be further enhanced via simple regression models. Such an evaluation should, ideally, be carried out in an independent sub

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00177.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe purpose of the present study was to evaluate the validity and reliability of a partial radiographic bivariate index system (PESI‐2). The principles of the index were applied to data from a random sample of 192 industrial employees aged 30–65 yr. Estimates of Extent and Severity of radiographic bone loss provided by the PESI‐2, as well as adjusted estimates by means of simple regression models, were compared to values obtained by a full mouth radiographic examination. It was shown that the values provided by the PESI‐2 were of rather high validity and reliability. The use of the adjusting models resulted in increased validity of the severity estimates and enhanced reliability of both components of the bivariate. The results verified the applicability of the PESI‐2 in epidemiologic research of destructive periodonta

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00178.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractDifferences in dental behavior and dental altitudes between people with (almost) all natural teeth, people with a full denture in both jaws and people with a full denture in only the maxilla are visualized by means of correspondence analysis in one overall picture. In this picture the three distinguished subgroups of dental patients and their characteristics are indicated as points in a two‐dimensional space. The distances between the points in this picture show to what extent these points are connected. The findings obtained in this study can lead to the conclusion that: a. differences in dental status are related to differences in dental behavior and dental attitudes; b. people with all natural teeth and people with a full demure in both jaws obviously are opposite of each other in many respects, whereas people with a full denture in only one jaw can be characterized as a dental in‐between gr

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00179.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractWe describe a random effects model for caries lesion development and progression based on considering the effects of the pH fluctuations over time in microbial dental plaque as a Wiener process with a single absorptive barrier. The model predicts that the period of greatest risk to developing caries occurs shortly after eruption, but thereafter the longer a surface survives without developing a lesion, the less likely will it be that a lesion will subsequently develop. The model is able to anticipate why the effect of water fluoridation on caries prevalence is most pronounced when caries is diagnosed at cavity level. This model offers one way in which the variability which characterizes the complex ecosystem associated with dental caries may be considered a subject of interest for enhancing our understanding of its pathogenesis and epidemiology.

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00180.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractSeveral studies were conducted recently to evaluate the use of Fiber‐Optic Trans‐Illumination (FOTI) in the diagnosis of approximal carious lesions. All these studies utilized radiographic readings to validate the FOTI diagnoses. Other investigations studied the value of radiographic readings using more solid validating techniques, which made it possible to judge the true state of decay, such as histology, cavity preparation and microradiography. In this study, data from both types of studies were used to estimate the validity of FOTI diagnosis of approximal caries relative to the true status of decay through correction for radiographic misclassification. The results indicate that particularly the sensitivity of FOTI diagnosis has yet to be determi

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00181.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe purpose of this study was to assess to what extent angulation of an X‐ray beam could affect the quality of diagnoses of caries adjacent to restorations with different radiopacities. Amalgam and composite class II restorations with and without secondary caries were done in extracted teeth. The teeth were radiographed using four different vertical angulations – 0, 5, 10, and 15°. Eight dentists diagnosed caries lesions on these radiographs. The best diagnostic outcome was found for the composite restorations radiographed at 10° vertical angulation. Diagnosis was generally better for lesions marginal to composites compared to amalgams. The quality of secondary caries diagnosis in connection with amalgam was not significantly affected by variations in vertical angulation from 0 up t

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00182.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe purpose of the present study was to investigate time trends in primary reasons for extraction of permanent teeth in Norway from 1968 to 1988. Johansen(2) studied reasons for extraction of 8757 teeth in 4216 patients during a 3‐Week period in 1968. Twenty years later a random sample of 500 Norwegian dentists provided particulars about all extractions carried out during a 2‐week period. 350 dentists (70%) replied in 1988 but 96 of them had not extracted any teeth during the observation period. Reasons for extraction of 985 teeth from 692 patients were available for analysis. Caries and its sequelae accounted for 35%, periodontitis for 19%, and orthodontic reasons for 20% of extractions in 1988. A comparison of the distribution of extraction according to reasons for patients over 20 yr of age revealed a highly significant difference between 1968 and 1988 (P<0.001) mainly due to a decrease in the role of caries and an increase in extractions for other reasons. Caries and its sequelae accounted for a higher proportion of extractions than periodontitis at all ages over 20 yr in 1968, only up to 45 yr of age in 1988. Thus it is concluded that the observed time trend in primary reasons for extraction corroborates expectations based on declining caries prevalence, increasing retention of teeth and a rise in dental attendance in Norway during the last 20

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00183.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThis study explored the relationships between Previous Denial Experience (PDE), Corah's Dental Anxiety Scale (DAS), the Dental Anxiety Question (DAQ), dispositional optimism as measured by the Life Orientation Test (LOT), and Clinical Behavioral Rating (CBR). The main purpose of the study reported here was to investigate the possible usefulness of the optimism‐pessimism dimension in predicting clinical dental anxiety. 163 children aged 10–12 yr participated in the investigation. The results indicate that both self‐reported dental anxiety and optimism‐pessimism were unique contributors to prediction of behavioral ratings of dental

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00184.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractQuestionnaire responses of 155 self‐referred subjects with extreme dental fear were used to evaluate the reliability and clinical usefulness of some psychometric tests used in diagnosis and treatment. The Corah Dental Anxiety Scale (DAS), State‐Trait Anxiety Inventory (STAI), and a general Geer Fear Scale (GPS) were filled out by all subjects, while 80 patients with highest dental fear scores were also tested before and after dental fear treatment with the following scales: a Getz Dental Belief Survey (DBS). Dental Fear Survey (DFS), and a Mood Adjective Checklist (M ACL). Cronbach's alpha measured internal consistency reliability. SPSS data analyses calculated item‐remainder and test‐retest correlations. Clinical usefulness of scales was judged by Spearman correlations of initial scores and test score changes after dental fear treatment. All total test scores showed high internal consistency and test‐retest reliability. DFS was judged the preferred clinical measure of threatening perceptions of pain or unpleasantness specific to dental procedures. DBS and STAI‐State measured confidence in relating with the dentist and situational feat‐associated with that relationship. GFS, STAI‐Trait, and MACL discriminated levels of general fearfulness, anxiety and mood fluctuations that can impact

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00185.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe number ofStreptococcus mutans, Streptococcus sobrinus, and lactobacilli in whole stimulated saliva was examined in 130 dentate 80‐ and 85‐yr‐old persons. 88.5% were positive for mutans streptococci and 29% carried>106cfu per ml saliva.S. mutanswas most frequently isolated and was found in 114 persons (88%) alone or in combination withS. sobrinus. S. sobrinuswas detected in 33 persons (25%), who also showed significantly higher salivary numbers of both mutans streptococci and lactobacilli than persons from whomS. sobrinuswas not isolated. TheS. sobrinuscarriers also had significantly lower stimulated saliva secretion rates than the non‐carriers.95%of the subjects had detectable levels of lactobacilli in saliva with 35% having>105cfu per ml saliva. When the subjects were divided into classes according to the number of intermaxillary contacts, i.e. the Eichner classification, the distribution of subjects with high and low salivary counts of cariogenic bacteria varied. Thus fewer subjects belonging to Eichner class A showed higher salivary numbers of mutans streptococci (14% had>106cfu/ml) as well as lactobacilli (21% had>105cfu/ml) than, for example, subjects belonging to Eichner class B (26% had>106cfu/ml of mutans streptococci. 35% had>105cfu/ml of lactobacilli). Subjects who carried a removable denture(s) had significantly higher salivary numbers of both mutans streptococci and lactobacilli than subjects without removable d

ISSN:0301-5661    

DOI:10.1111/j.1600-0528.1991.tb00186.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY