| 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. |
- Bjarnason, Sibilia, et al.
(author)
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Enamel fluoride and caries in Icelandic children and a comparison of enamel fluoride in Swedish and Icelandic children.
- 1989
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In: Caries research. - 0008-6568. ; 23:2, s. 87-91
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Journal article (peer-reviewed)abstract
- The fluoride content in surface enamel and its relationship to caries experience was studied in a group of Icelandic schoolchildren living in a low-fluoride area. Fluoride content was assessed by means of in vivo enamel biopsies sampled from 248 subjects aged 11 and 12 years. Dental examinations were performed in conjunction with the biopsy sampling and by the same examiner 1 year later. The prevalence and incidence of initial (DSI) and manifest (DFS) caries lesions were recorded separately. A median fluoride concentration of 610 ppm at a median biopsy depth of 4.2 microns was observed. A significant positive correlation was found between DSI and enamel fluoride content in girls and all older children. Additionally, surface enamel fluoride was measured in 72 Swedish children from a low-fluoride area but exposed to regular topical fluoride treatments. The difference in mean fluoride concentrations between the Icelandic and Swedish study populations was highly significant. From the measured fluoride concentrations the enamel fluoride profiles for both study populations were constructed. The differences in fluoride content were most pronounced in the outermost layer, apparently reflecting the higher exposure to and acquisition of topical fluoride in the Swedish children.
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| 3. |
- Bjarnason, Sibilia, et al.
(author)
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Sugar consumption and caries experience in 12- and 13-year-old Icelandic children.
- 1989
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In: Acta odontologica Scandinavica. - 0001-6357. ; 47:5, s. 315-21
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Journal article (peer-reviewed)abstract
- Dietary habits with regard to sugar consumption and caries experience were studied in a group of 275 Icelandic children aged 12 and 13 years. The pattern of meals and sugar-containing food intake frequency were assessed by means of a dietary questionnaire. All dental examinations were performed by one examiner, using standardized methods and diagnostic criteria. Only 75% of the children had three regular meals daily. Breakfast and lunch were the most frequently omitted meals. Sweet buns were consumed by 32% of the children with meals and by 58% between meals, whereas soft drinks were consumed by 42% and 46%, respectively. Eighty-three per cent of the children reported eating sweets daily. The most popular products included confectionery, buns, cakes, and soft drinks, which constituted 53% of the intake with meals and 68% of that between meals. A higher caries incidence was associated with frequent intake of buns and cakes with meals and confectionery.
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| 4. |
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| 5. |
- Crona-Larsson, G, et al.
(author)
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Effect of luxation injuries on permanent teeth.
- 1991
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In: Endodontics & dental traumatology. - 0109-2502. ; 7:5, s. 199-206
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Journal article (peer-reviewed)abstract
- Trauma to the supporting tissues of the teeth are among the most common dental injuries, leading to such complications as pulp canal obliteration, necrosis and root resorption. The aim of this investigation was to study the outcome for young permanent teeth subjected to luxation injuries. From 108 dental records 171 teeth with injuries to the supporting tissue were selected. The material comprised 130 subluxated, 15 extruded, 9 intruded, 15 exarticulated and 6 laterally luxated teeth in children aged 6-19 years. Apart from luxation, 59 teeth (35%) had additional crown and root fractures. 65% of the teeth recovered without complications. 78% of the subluxated teeth and 24% of the luxated teeth showed uneventful posttraumatic healing. Concomitant uncomplicated crown fractures or root fractures without displacement of the coronal fragment did not interfere with the healing. Of 60 teeth with healing complications, 52 (87%) were subsequently recorded as healed, the remaining 8 were extracted or had progressive root resorption. Loss of pulp vitality and external root resorptions were the most often recorded complications (28% and 17% of the total material respectively). Pulp canal obliteration was noted in 3% of the cases. Extent of injury and degree of tooth maturity were found to be related to healing complications.
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| 6. |
- Gängler, P, et al.
(author)
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Reactivity of young and old human enamel to demineralization.
- 1993
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In: Scandinavian journal of dental research. - 0029-845X. ; 101:6, s. 345-9
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Journal article (peer-reviewed)abstract
- The aim of this study was to determine the susceptibility of newly erupted and old permanent teeth to artificial, caries-like attacks. Two groups of caries-free teeth were used. Group 1 consisted of 38 teeth extracted for orthodontic reasons (9-12-yr-old children); group 2, of 40 teeth extracted for periodontal reasons (45-65-yr-old patients). After thorough cleaning, a test window was isolated on the incisal two-thirds of the buccal surface. After demineralization with 6% HEC gel at pH 4.9 for 8 days, longitudinal ground sections were prepared for imbibition studies in polarized light and for secondary ion mass spectrometry (SIMS). In the young teeth, the lesions appeared to be uniform in their extension in the enamel, whereas the old teeth showed less marked and thinner surface zones and greater depth of the positively birefringent body of the lesion. Polarized light microscopy and SIMS data support the hypothesis that there are different enamel pathways in the initiation of the natural carious process.
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| 7. |
- Klingberg, Gunilla, 1960, et al.
(author)
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Dental behavior management problems in Swedish children.
- 1994
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In: Community dentistry and oral epidemiology. - 0301-5661. ; 22:3, s. 201-5
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Journal article (peer-reviewed)abstract
- 4505 Swedish children aged 4-11 yr were surveyed regarding dental behavior management problems (BMP) and dental health. Dental charts were retrieved from clinics in the Public Dental Service in Göteborg, and data were then compiled regarding BMP, action against BMP, caries, fillings, use of local anesthetics, and number of missed appointments. Behavior management problems were found in 10.5% of the children, and were more common in the younger children, among children who missed appointments, and in children who received restorative treatment without local anesthetics. The BMP children had more carious and fewer filled surfaces. In 43.4% of the cases with BMP the strategy chosen was postponement of dental treatment or no measure taken.
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| 8. |
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