| 1. |
- 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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| 2. |
- Hakeberg, Magnus, 1954, et al.
(author)
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A 10-year follow-up of patients treated for dental fear.
- 1990
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In: Scandinavian journal of dental research. - 0029-845X. ; 98:1, s. 53-9
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Journal article (peer-reviewed)abstract
- Different types of treatment have been used in trying to reduce dental anxiety in adult patients with severe fear and avoidance behavior. However, there is an obvious shortage in long-term treatment follow-up. The present investigation reports results over a period of 10 yr of 14 patients treated for dental fear in a specialized dental fear treatment and research clinic. The aims of this project were to evaluate patients' regularity in dental behavior between 1977 and 1987, changes in and present level of dental fear and other long-standing positive/negative effects of the respective initial treatments. The 14 dental phobic patients were assigned to two treatment groups, one receiving Systematic Desensitization and one Premedication with valium before dental treatment. Pre- and posttreatment status as well as the 10-yr follow-up were evaluated by psychometric (Corah's Dental Anxiety Scale and a Mood Adjective Checklist) and physiological (Skin Conductance Response) measurements. A majority of patients (100% SD, 63% P) reported regular dental care during the period 1977-87. Positive side-effects were reported by seven patients. A significant reduction of dental fear (DAS) was found with a better effect for the SD-group. This was paralleled by a rise in mood (MACL). The SCR figures were non-significant. In conclusion, the results revealed long-standing effects with regard to a high degree of regular dental care and reduction of dental fear. In addition, positive side-effects were reported.
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| 3. |
- Larsson, Erik, et al.
(author)
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Dummy- and finger-sucking habits in young Swedish and Norwegian children
- 1992
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In: Scandinavian journal of dental research. - 0029-845X. ; 100:5, s. 292-295
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Journal article (other academic/artistic)abstract
- The prevalence of dummy- and finger-sucking habits in 3-yr-old children was registered in four different areas of Sweden and Norway. In Norway 245 children were examined and in Sweden 171 children. The Swedish children were more prone to develop a dummy-sucking habit as well as to prolong it. About 10-19% of the children in the different groups become finger-suckers. Very few of these finger-suckers had stopped sucking at 3 yr of age. The highest rate of non-suckers was found among the children from Karasjok/Kautokeino in northern Norway, who were mainly of Lappish origin.
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| 4. |
- Lundgren, Ted, 1959, et al.
(author)
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Retrospective study of children with hypophosphatasia with reference to dental changes.
- 1991
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In: Scandinavian journal of dental research. - 0029-845X. ; 99:5, s. 357-64
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Journal article (peer-reviewed)abstract
- In the present retrospective study different dental and medical parameters have been analyzed in 17 Swedish children with established hypophosphatasia (HP). It was demonstrated that the basis for the establishment of the diagnosis varied among different dentists and physicians, and that the diagnostic parameters studied among the children varied. The most reliable parameters for HP included raised levels of phosphoethanolamine in urine, and clinical and radiologic findings associated with the legs. These findings were found among the children more often than lowered values of alkaline phosphatase in serum. Histologic analysis of an extracted tooth made a valuable diagnostic complement. It is concluded that a better diagnostic uniformity is recommended. In a well functioning collaboration with well defined tasks, both dentists and physicians can contribute to a reliable diagnosis.
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| 5. |
- Ranggård, L, et al.
(author)
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Clinical and histologic appearance in enamel of primary teeth in relation to neonatal blood ionized calcium values.
- 1994
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In: Scandinavian journal of dental research. - 0029-845X. ; 102:5, s. 254-9
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Journal article (peer-reviewed)abstract
- The purpose of this investigation was to study the relationship between low values of blood ionized calcium measured in the first days of life postpartum and the clinical and histologic appearance of enamel of primary teeth. Twenty-five healthy children selected on the basis of optimality with known blood values of ionized calcium from the first days of life participated in a dental examination at the age of 5 yr. Twenty-four of the children contributed one exfoliated tooth each, which was histologically examined. The infants had lower mean values of ionized blood calcium on days 1 and 3 than day 5 postpartum. Thirteen of the 25 children had enamel aberrations, mainly on one tooth each. The histologic examination showed normal overall enamel morphology. The neonatal line was present in all teeth, and these lines were mostly thin. The registered findings about the enamel morphology could not, in any case, be correlated with the measured values of neonatal blood ionized calcium.
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| 6. |
- Ranggård, L, et al.
(author)
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Effect of hypocalcemic state on enamel formation in rat maxillary incisors.
- 1994
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In: Scandinavian journal of dental research. - 0029-845X. ; 102:5, s. 249-53
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Journal article (peer-reviewed)abstract
- Several authors have proposed that hypocalcemia can interfere with amelogenesis, resulting in enamel aberrations. Therefore, the purpose of this investigation was to study the effects of a diet-induced hypocalcemic state in young rats on enamel formation of the maxillary incisors. The experimental rats were fed a special diet, free from vitamin D and very low in calcium. The control rats were fed a normal diet. The experimental period was 3 wk. After termination, the blood analysis showed that the experimental rats had developed hypocalcemia with very low values of both total and ionized blood calcium. The experimental rats were smaller than their controls after 3 wk, with smaller skulls and teeth. At the light microscope level, the enamel and the ameloblasts did not seem to be affected, except in one rat, the smallest, which showed enamel hypoplasias in both maxillary incisors and a delayed increase of the mineral content during the maturation stage process. It is concluded that the hypocalcemic state induced did not greatly affect enamel formation. However, occasional enamel aberrations may occur.
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| 7. |
- Ranggård, L, et al.
(author)
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Parathyroid hormone and enamel formation in rat maxillary incisors.
- 1991
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In: Scandinavian journal of dental research. - 0029-845X. ; 99:2, s. 90-5
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Journal article (peer-reviewed)abstract
- Parathyroid hormone (PTH) plays an important role in regulating calcium in serum. It is also known to affect bone and dentin formation. The purpose of this investigation was to evaluate enamel formation in normal rats receiving added PTH. It is in two parts: a pilot study where a known method was tested, followed by the main study where the rats were given different doses of PTH. The enamel was examined in both studies and in the main study the ameloblasts were also investigated. Contradictory results were seen. In the pilot study, severe enamel aberrations occurred, while no divergence from normal amelogenesis was noted in the main study. A factor causing the disparate results was the use of a hard tissue marker (oxytetracycline) in the pilot study. It can be concluded that injections of PTH in doses that affect bone and dentin did not cause any changes in normal enamel formation.
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| 8. |
- Sjögren, K, et al.
(author)
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Salivary fluoride clearance after a single intake of fluoride tablets and chewing gums in children, adults, and dry mouth patients.
- 1993
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In: Scandinavian journal of dental research. - 0029-845X. ; 101:5, s. 274-8
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Journal article (peer-reviewed)abstract
- The aim of the present investigation was to compare the clearance pattern in saliva and the salivary stimulating effect of a new fluoride (F) chewing gum (Fluorette) with three other F products used in Scandinavia for many years for caries prevention. Concentration of F was determined in whole saliva in three groups of subjects: 1) children, 10-12 yr of age (n = 20), 2) adults (n = 20), and 3) dry mouth patients (n = 15), after a single intake of the two tablets, Dentan and Fludent, and the two chewing gums, Fluomin and Fluorette, all containing 0.25 mg F as NaF. Sucking was allowed until the tablets had been completely dissolved in the mouth. The chewing gums were used for 15 min. Saliva samples were collected from subjects expectorating 0.3-0.5 ml at nine different time intervals up to 45 min after the intake. There were some significant differences in the maximum F concentration, the area under the salivary fluoride concentration curve (AUC) when plotted against time, and the salivary stimulating effect among the four products, but as a whole they were small and probably of minor clinical importance. Among the various groups, the dry mouth patients showed the highest salivary F concentration. Thus, the main conclusion from this study is that the F tablets and chewing gums studied, including the new product Fluorette, had approximately the same clearance pattern in saliva and the same salivary stimulating effect. However, there were great variations among the different subjects.
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| 9. |
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