| 1. |
- Bjarnason, Sibilia, et al.
(author)
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Bonded resin sealant on smooth surface dental enamel--an in vitro study.
- 2003
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In: Swedish dental journal. - 0347-9994. ; 27:4, s. 167-74
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Journal article (peer-reviewed)abstract
- The aim of this study was to in vitro evaluate the micro leakage of a fissure sealant on sound and demineralized enamel using thermo cycling. The effect of the sealing procedure on sound and demineralized enamel were assessed on human premolars that were divided into one Control group and two Test groups. The Control group served as a baseline reference for the subsequent test procedures. The crowns of five teeth were covered with wax leaving three separate windows on the buccal surfaces. The enamel in one window was acid-etched, in the second window demineralized, and in the third window demineralized and subsequently acid-etched. In Test group 1, containing ten teeth, a defined enamel area on the buccal surfaces was acid-etched and sealed. The sealed area and a border of sound enamel around it were subjected to the demineralizing procedure. In Test group 2, a defined enamel window of 13 teeth was demineralized and subsequently etched and sealed. The sealed area and a border of surrounding enamel were subjected to a new cycle of demineralization. The longitudinal, bucco-lingual sections were examined in polarized light. When placed on acid-etched surfaces, the resin adhered firmly to the enamel with no evidence of demineralization or enlargement of previously demineralized areas underneath the sealants.
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| 2. |
- Swedberg, Yngve, et al.
(author)
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A 15-year series analysis of caries development related to a socioeconomic variable. A study of the year group leaving the organised dental care in Göteborg, Sweden.
- 2003
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In: Swedish dental journal. - 0347-9994. ; 27:3, s. 151-8
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Journal article (peer-reviewed)abstract
- In a long-term series analysis the study had the aim of detecting how the used socioeconomic variables were related to the caries status development in the year group leaving the organised dental care. The study included caries epidemiological records of individuals at the Public Dental Service of Göteborg, leaving the organised dental care during 1986-2000. The City of Göteborg was divided into four districts. One incidence and one prevalence caries index was used, each presented in two subgroups: individuals with no caries record and patients with 20% of the highest index values. The socio-economical variable was individuals 18-64 years of age, seeking employment, as a percentage of the corresponding group of all inhabitants. The registered values were divided into three time sections of five years each. In the first, the socio-economic value curves were almost horizontal, in the second they showed a considerable increasing and in the third a declining tendency. The result curves for the caries-free patient groups and for patients with 20% of the highest caries index values compared to the three socioeconomical time sector results, showed an almost horizontal level concerning the incidence index values, and for the prevalence index values an inclined curve structure to the incidence curves. The result curves for the incidence index with respect to the caries-free patient group showed an almost horizontal structure, while the prevalence curves inclined towards the incidence curves during the study period. The linear structure of these curves deviated considerably from the result curves for the socio-economic time series. No correlation existed between the socio-economic data and the studied caries index values. The need for determining the time length concerning caries index observations was discussed. It must be of special interest to maintain the dental health of the studied patient group and the individuals' relation to regular dental care, when as adults they meet the dental care economy.
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| 3. |
- Swedberg, Yngve, et al.
(author)
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Analysis of caries status development in relation to socio-economic variables using a case-based system.
- 2001
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In: Swedish dental journal. - 0347-9994. ; 25:2, s. 81-8
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Journal article (peer-reviewed)abstract
- The aim of this study was to detect, using case-based reasoning (CBR) induction methods in time series analysis, how measurable socio-economical adjustments were related to the caries status development. The study concerned the year classes leaving the organised dental care for the time period 1987-95, and had received dental care at the Public Dental Service of Göteborg. The results, as presented by a caries incidence index, indicated that at least one socioeconomical factor, individuals seeking employment, was of importance for the caries status development, a factor with an increase of considerable proportions since 1990. The findings indicated that the other socio-economic variables used did not have the same importance for the caries status development. One feasible explanation is that these factors reflect more upon the social family situation than the economical. If the caries status reflects the social situation of the individual more than the economical, this argument will elucidate the reasoning. Using CBR for the analysis of relationships between oral disease and parameters possibly influencing health development has proven to be a valuable tool and complement to more traditional statistical methods. The analysis can make relationships explicit through the hierarchic knowledge trees and also show redundant information, attributes not appearing in the trees.
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