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PubMed1993

Composite indicators of dental health: functioning teeth and the number of sound-equivalent teeth (T-Health).

This study investigated whether two new composite dental indicators--"the number of functioning teeth" and "the number of sound-equivalent teeth"--are more efficient than the conventional DMFT index in revealing the social and behavioural factors which are significantly related to oral health status. The arbitrary set of weights given to the T-Health indicator was also evaluated. The number of functioning teeth was defined as the aggregate of filled (otherwise sound) and sound teeth. The T-Health was defined as a weighted average of sound teeth, filled (otherwise sound) teeth and teeth with some decay, the weights intended in principle to represent the relative amounts of sound tissue in these three categories of teeth. An arbitrary set of weights was used: 4, 2, and 1 for sound, filled, and decayed teeth, respectively. 164 families (father, mother and at least one 13-yr-old child) from Belo Horizonte, Brazil, were randomly selected from 13-yr-old children from private and state schools. The parents' ages ranged from 35 to 44 yr. Socio-economic status, area of residence, level of education, family income, sugar consumption, toothbrushing frequency and type of dental attendance were the social and behavioural oral health risk-factors considered in this study. The results indicated that the two new dental indicators are more sensitive to the influence of social and behavioural factors, such as those investigated here, than is the traditional DMFT index. A different set of weights (4, 1, and 1 for sound, filled, and decayed) was suggested for the construction of the T-Health.

Adolescent↗

PubMed1994

Tooth and root conditions in the middle-aged and the elderly in Hong Kong.

In an oral health survey of Hong Kong Chinese conducted in 1991, a sample of 372 35-44-yr-olds and 537 noninstitutionalized 65-74-yr-olds were interviewed and clinically examined. The examination procedures, instruments, and diagnostic criteria used to detect coronal caries followed those recommended by the World Health Organization (1987). The diagnostic criteria used to assess root-surface caries were based on those used in a national oral health survey of US employed adults (National Institute of Dental Research, 1987). Calibration of examiners was conducted before the survey and the interexaminer reliability was found to be very high; the kappa statistics were 0.93 and 0.91 for the younger and older age groups, respectively. None of the 35-44-yr-olds were edentulous and 96% had 21 teeth or more. The prevalence of edentulousness among the elderly was 12%. The DMFT indices of the younger and older age groups were 8.7 and 18.9, respectively. In both age groups, MT was the major component of the DMFT index, and female subjects had a slightly higher score. The prevalences of decayed/filled roots were 7% and 26% for the 35-44- and 65-74-yr-olds, respectively. As compared with previous surveys conducted in Hong Kong, there has been a 40% reduction in the DMFT index of the 35-44-yr-olds since 1968, but little change in the tooth and root conditions was noted between 1984 and 1991.

Adult↗

PubMed1996

Improving dental health status indicators for evaluation.

Central to the evaluation of any dental health programme is the dental status of the population it serves. The DMFT index has been widely used to indicate dental status in evaluations, however, there are a number of characteristics of the DMFT index which undermine its value in evaluating programmes. The aim of this study was to compare DMFT, five utility weighted versions of this index, and single measures of caries experience, in order to determine their relative validity. The indices were investigated in terms of two criteria: 1) the percentage of variance explained by a set of antecedent and behavioural variables in a series of multiple regression analyses; and 2) percentage changes in the indices following re-examination of the population after five years. Results show that the variance explained by the different composite indices ranged between 29% and 46%, while it varied between 16% and 49% for the single measures. The size of percentage changes after five years ranged between 0% and 4.5%), and indicated that utility weighted indices were generally not more sensitive than the DMFT, but that some single measures were. Where composite indices are required, a full quality adjusted tooth years (QATY) approach, rather than utility weighting the DMFT index, may be required to improve the validity of dental health status indicators. Single rather than composite measures also provide valid information for evaluating dental programmes.

Adolescent↗

PubMedDate not supplied

[Dental caries and the local immunity of the oral cavity in Zn deficiency in the environment].

Caries incidence, oral hygiene and local immunity were studied in children living in the areas with soil deficient for zinc and with that with the normal levels of this metal. Higher DCL index, elevated values of the Fedorov-Volodkina oral hygiene index, and lowered levels of salivary secretory IgA and lysozyme were revealed in those living in the areas with soils deficient for zinc.

Child↗

PubMed1984

Differentiating positively and negatively health oriented Finnish university students by discriminant analyses.

Dental health practices among Finnish university students were studied in 1980. In order to obtain more information about the factors associated with different health status this problem was studied using linear discriminant analyses. 360 students were separately classified into fifths according to increasing individual VPI, GBI and DMFS index scores. According to the classification, the students of the two first fifths with lowest mean index scores were combined in the positively health oriented group. The students with low VPI and GBI index scores reported that they brushed their teeth most frequently. Also the good results of the dip-slide method for counting salivary lactobacilli correlated well with the low VPI and DMFS index scores. In the discriminant analysis toothbrushing frequency was the most important single variable related to a good VPI score. By a computer method, 64% of the students were found to be correctly placed in the group of the positively health oriented. The corresponding percentage for the negatively oriented was 69%. The most important single variable related to good GBI and DMFS scores was subjective estimation of condition of dentition. According to GBI score the method correctly placed 57% of the students in the group of the positively and 69% in the group of the negatively health oriented. The respective percentages for DMFS-index were 65% and 68%. The predictor variables failed to make an important contribution toward explaining the great variations in the oral health status indicators.

Attitude to Health↗

PubMed1994

Dental caries status of 12-year-old students in the state of Mexico.

A total of 2275 schoolchildren 12 yr of age from the four health regions of the State of Mexico were examined for the prevalence and severity of dental caries. The proportion of caries-free children was only 10%, and the DMFS index was 6.94. 78% of the index derived from decayed surfaces, and 19% from filled surfaces. Pits and fissures of the permanent first molars were the most frequently affected surfaces. Higher dental caries scores were found in rural areas compared with the urban centers. No significant relationship was found between use of dentifrice and dental caries. Several reasons for this lack of relationship are discussed. 10% of the children account for 23% of the DMFS index. Results indicate the need to aim preventive and restorative programs at the whole population as well as at specific high risk groups or individuals.

Chi-Square Distribution↗

PubMedDate not supplied

Comparison of the def index with Nyvad's caries diagnostic criteria in 3- and 4-year-old Colombian children.

PURPOSE: The aims of this research were to determine the epidemiological profile of dental caries in 3- and 4-year-old preschool children living in Bogotá, Colombia, and to compare two different caries indices--the standard def and Nyvad's new caries diagnostic criteria. METHODS: The children were screened by two calibrated examiners who first brushed the children's teeth and air dried them for 5 seconds before they were examined. The diagnostic criteria used were the standard def-t and def-s and the def-t and def-s of the new caries diagnostic system proposed by Nyvad. The chi-square test2 was used with a significance level of 5%. RESULTS: Prevalence of caries was 70% using the standard def-t criteria and 97% with the criteria proposed by Nyvad. The standard def-t and def-s were 3.3 and 5.7, respectively, and the def-t and def-s with the Nyvad citeria were 8.7 and 14.3, respectively. CONCLUSIONS: Prevalence of caries was high, indicating that the population studied had a high disease rate. The results obtained with the more detailed Nyvad new caries diagnostic criteria were higher than the ones obtained with the standard def-t index, both for teeth and surfaces.

Child, Preschool↗

PubMed1992

Comparison of dental caries and oral hygiene indices for 13- to 14-year-old Quebec children between 1977 and 1989-1990.

A comparison of the principal dental health indices of 13- to 14-year-old Quebec school children between 1977 and 1989-1990 is reported. Data derive from a dental health survey of 1,093 Quebec school children in 1977 and from a province-wide probability sample of 1,342 children in 1989-1990. The most interesting conclusions are: the DMFT index for 13- to 14-year-old children dropped from 9.0 to 4.5; an improvement in the caries treatment level from 26 per cent to 90 per cent is noted; caries treatment needs decreased from 55 per cent to nine per cent; the mean number of extracted teeth per child dropped from a score of 1.6 to a score of 0.03; significant differences in the DMFT index between residential status no longer exist; and no improvement in the oral hygiene condition (OHIS index) is observed. In 1989-1990, 35 per cent of these adolescents had perfect periodontal health. For the others, the principal problems were bleeding gums and/or calculus.

Adolescent↗

PubMed1994

The dental caries experience of 5-, 12- and 14-year-old children in Great Britain. Surveys coordinated by the British Association for the Study of Community Dentistry in 1991/92, 1992/3 and 1990-91.

A series of caries prevalence surveys across Great Britain has been coordinated by the British Association for the Study of Community Dentistry (BASCD) since 1985/86 with the aim of monitoring caries experience in representative samples of school children aged 5, 12 and 14 years of age. The purpose of this report is to present the findings of the surveys of 14-, 5- and 12-year-old children carried out in 1990/91, 1991/92 and 1992/3 respectively. These point prevalence surveys were conducted at the caries into dentine level of diagnosis using clinical examination only and a standardised, predominantly visual, diagnostic method employed by trained and calibrated teams of examiners from each country/region of Great Britain. For the 14-year-old age group, 114,126 children from 179 health authorities/boards were examined. The weighted mean DMFT for the participating countries and regions was 2.30 (range, 1.42-3.55). At age 5 years, 205,444 children from 184 health authorities/boards were examined. The weighted mean dmft for the participating countries and regions was 1.86 (range, 1.04-2.88). At age 12 years, 151,143 children from 186 health authorities/boards were examined. The weighted mean DMFT for the participating countries and regions was 1.27 (range, 0.84-2.08). A wide geographical variation in the results was evident for all three age groups, demonstrating a consistent north-south pattern, with higher levels towards the north of Britain. Trends in caries experience in permanent teeth indicate that the decline is now much slower for 12-year-old than for 14-year-old children and slower than the rate for 12-year-old children during the previous 4 year interval between examinations. For 5-year-old children, overall, the general decline in caries experience has ceased, while increases in dmft and in proportions with untreated dentinal decay are now seen in most parts of Great Britain. The pattern of restorative care provided has deteriorated with a fall in the care index for 5- and 12-year-old children, this finding may be related to changes in service provision within the UK.

Adolescent↗

PubMed2001

Caries risk assessment from dental plaque and salivary Streptococcus mutans counts on two culture media.

This study attempted to determine which combination of plaque or saliva, and tryptic soy agar, bacitracin (TSY20B) or mitis salivarius, bacitracin media, yielded the highest caries-predictive values for mutans counts in children with different caries prevalence. Sixty children were divided into three equally sized groups: caries free, low caries and high caries. Eighteen months later, their caries incidence and initial mutans count were compared. Fissure plaque on TSY20B yielded a high correlation between mutans counts and caries prevalence (P<0.009, r=3346) and incidence (P<0.003, r=4521). The caries-predictive values obtained demonstrate that the coefficient of variation of mutans counts from lower first-molar fissure plaque on TSY20B accounts for 20.4% of the variation in final caries index. This strong correlation provides a valuable tool for the identification of caries-prone individuals.

Agar↗

PubMed2006

Dental features in patients with Turner syndrome.

AIM: This was to investigate the dental characteristics (caries sensitivity and tooth crown size of permanent elements) in subjects affected by Turner Syndrome (TS). PATIENTS AND METHODS: A group of 25 patients affected by TS, aged from 4 to 18 years, was selected and the data were compared to those of an age matched control healthy group. The caries index values in TS patients are higher in the permanent (6.4 vs. 3.9), mixed (0.5 vs. 0.75) and primary dentition (0 vs. 1). The mesio-distal diameter in TS patients was significantly reduced for every tooth measured (in particular for the lower first permanent molar). RESULTS AND CONCLUSION: This investigation confirms that numeric aberration of the X chromosome most likely affects the quantitative and qualitative excretion of amelogenin so that teeth often present enamel defects (reduced crown size and enamel hypoplasia). High caries index values (DMFT) highlight the demand of early preventive measures mostly focused on special care patients.

Adolescent↗

PubMed2006

[Declining caries rate in a municipality in northwestern São Paulo State, Brazil, 1998-2004].

This study analyzes the DMF and DEF indices, SiC index, and percentage of caries-free public schoolchildren in the municipality of Bilac, São Paulo State, Brazil, in 1998, 2000, 2002, and 2004. The same methodology was employed (WHO-1997) in all the surveys. Kappa test was carried out at each stage, and the minimal and maximum inter-examiner agreement values obtained were 0.86 and 0.89, respectively, while minimal intra-examiner agreement values were 0.91. DEF indices decreased slightly in the years 1998 and 2004. There was a continuous reduction in the DMF index, as well as the phenomenon of polarization at 12 years of age. The rate was 5.28 in 1998, decreasing to 4.11 in 2000, 3.47 in 2002, and 2.62 in 2004. Inversely, the proportion of caries-free 5-year-olds increased from 37.9% in 1998 to 40% in 2000 and 2002 and 45.3% in 2004. In conclusion, there has been a decrease in dental caries in 12 year-old public schoolchildren in the municipality.

Age Distribution↗

PubMed2002

The relationship between the levels of SigA, lactoferrin and alpha(1) proteinase inhibitor in saliva and permanent dentition caries in 15-year-olds.

A group of 15-year-olds were clinically examined for general state of dentition and level of dental caries. Unstimulated whole saliva from the subjects was laboratory tested to determine the levels of lactoferrin, Secretory IgA (SIgA) and alpha1 proteinase inhibitor. A significant relationship was found between the decayed surface index and the levels of lactoferrin, SIgA and alpha1 proteinase inhibitor in the unstimulated saliva. The decayed surface index rose with increases in the levels of lactoferrin, SIgA and alpha1 proteinase inhibitor, the relationship with alpha1 proteinase inhibitor being strongest.

Adolescent↗

PubMed1979

The relative caries-inhibiting effects of a stannous fluoride dentifrice in a silica gel base.

An unsupervised toothbrushing study involving 1,339 children from 5 to 13 years of age conducted for three years compared two stannous fluoride dentifrices, one in a calcium pyrophosphate base and the other in a silica gel base, with a nonfluoride control dentifrice. The test dentifrice, stannous fluoride in a silica gel base, reduced caries to a significant extent when compared with the nonfluoride control dentifrice.The percentage of reductions ranged from 15% to 25% for whole mouth and interproximal surface indexes. There was no significant difference between the two fluoride dentifrices.

Adolescent↗

PubMed2006

[Oral health of institutionalized elderly in the eastern zone of São Paulo, Brazil, 1999].

The objective was to verify oral health conditions in institutionalized elderly people in the city of São Paulo, Brazil, through epidemiological analysis. The sample consisted of 293 subjects and was stratified according to age (65-74 years and over 75) and gender. Epidemiological analysis was conducted according to WHO criteria to determine prevalence of oral disease. Chi-square and Mann-Whitney tests were used to check differences between strata. Of the subjects evaluated, 64.8% were women and 65.2% were over 75 years old. DMFT was 30.8 with tooth loss of 96.3%, and this percentage was statistically greater for women (97.0%); 94.7% showed calculus as a major degree of periodontal condition, and only 1.8% presented healthy periodontal conditions and 33.3% presented loss of attachment ranging from 6 to 8 mm. Some 48.1% used total upper and 22.5% total lower prostheses. Edentulism was 68.3%. The data indicate unsatisfactory clinical conditions, as shown by the high CPO-D index and high percentage of edentulism.

Age Distribution↗

PubMed1996

Dental health in 14- to 17-year-old Estonian schoolchildren in Tartu and Tallinn.

The dental health of 392 Estonian schoolchildren aged 14-17 years (197 in Tartu and 195 in Tallinn) was studied. In Tartu only 1 child had lost teeth because of caries, as against 30 in Tallinn. Clinically caries-free dentitions were found in 15% of the children in Tartu and in 3% in Tallinn. The mean DMFT value was 3.7 in Tartu and 7.0 in Tallinn, being higher among girls in both cities. The mean DT value was 1.0 in Tartu and 2.6 in Tallinn. All subjects examined had a gingival bleeding index (GBI) higher than zero. The mean GBI was 20% in Tartu and 18% in Tallinn.

Adolescent↗

PubMed2005

Summary measures of caries prevalence to describe high-risk communities.

STUDY OBJECTIVE: This investigation compared the Significant Caries Index (SiC) with alternative summary measures of caries prevalence, designed to highlight high-risk communities and examined the implications of their use in health policy and planning in Wales. DESIGN: Data from the 2001 BASCD survey of 7,412, 12-year-old Welsh children were used in this analysis. As an alternative to the 33% cut-off value utilised in the SiC, the mean DMFT of children with the 10, 20 and 25% highest caries scores were calculated for 22 local health board areas, as was the mean DMFT for the whole population, %DMFT >0, and the mean for those with DMFT >0, >1, >2, and >3. SETTING: Examinations for the childhood epidemiology programme took place in Welsh secondary schools. PARTICIPANTS: 12-year-old children examined in the 2000/01 survey. MAIN RESULTS: The mean DMFT for the whole population was 1.31, and the mean DMFT of those with caries was 2.56. The mean DMFT for SiC 33%, 25%, 20% and 10% was: 3.39, 3.85, 4.28, and 5.31 respectively. When local health board areas were ranked according to mean DMFT score at different percentage cut-off points, variation in rank order was observed, the greatest difference in rank order being 6. Furthermore, when compared with summaries based on DMFT scores traditionally used in Wales, even greater rank differences were noted (up to 14 places). CONCLUSIONS: Rank order of geographical area is influenced by the definition of the index chosen when describing high risk populations using a variety of caries indices. This has implications for health policy planning and resource allocation.

Catchment Area, Health↗

PubMed1991

Intercomparison of prevalence and severity of dental caries using two recording systems.

Dental caries was recorded using WHO index (1983) and Moller's index (1966) in 1265 children in the age group of 5, 8, 11 and 15 years to determine the conversion and correlation figures, so as to facilitate cross comparison and quick appraisal where either of the systems have been used in epidemiological studies. The results revealed that dental caries was recorded higher with Moller's index as compared to the WHO index; on an average the difference was fourteen percent in point prevalence, one deft + DMFT and one and a half defs + DMFS.

Adolescent↗