| 1. |
- Andersson-Wenckert, Ingrid, et al.
(författare)
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Anevac-D, a new system for close scavenging of anesthetic gases in dental practice
- 1989
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Ingår i: Scandinavian Journal of Dental Research. - 0029-845X. ; 97:5, s. 456-64
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Tidskriftsartikel (refereegranskat)abstract
- Anevac-D, a new system for close scavenging of anesthetic gases in dental practice is described. It consists of a rubber nose mask surrounded by an outer rigid shell and a chin scavenger. A vacuum in the slot between the nose masks provides scavenging of gases escaping from the inner mask. Gases escaping from the mouth are evacuated mainly by the skin scavenger. The efficiency of this system was assessed in healthy volunteers using argon as a tracer gas. Mass spectrometry was used for measurement of inspired, expired, and scavenged gas concentrations. The scavenging efficiency of the complete system was around 80% and was not affected by poor patient cooperation. It decreased to about 65% when the chin scavenger was removed. The dentist's exposure was measured by sampling of argon in the breathing zone by a Saran system. The average 4-min exposure varied between 90 and 250 ppm depending on system configuration and patient cooperation. Patient acceptance and clinical applicability were judged good. It is concluded that the Anevac-D system provides excellent scavenging properties and exposure levels well within the official recommendations by the Swedish Board of Occupational Safety and Health.
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| 2. |
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| 3. |
- Dahlström, Lars, et al.
(författare)
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Comparison of effects of electromyographic biofeedback and occlusal splint therapy on mandibular dysfunction.
- 1982
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 90:2, s. 151-6
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Tidskriftsartikel (refereegranskat)abstract
- In order to evaluate and compare the effects of biofeedback and occlusal splint therapy on mandibular dysfunction, 30 patients were randomly divided into two treatment groups. The patients were women aged 20--40 years without any obvious organic reasons for their symptoms. There were no significant differences between the two groups before the start of treatment in respect of signs and symptoms of mandibular dysfunction. One group used full coverage splints at night for 6 weeks. The other group received biofeedback training up to six times, 30 min per session. One month after completion of the therapy the patients were re-examined. Both groups showed a significant reduction in symptoms, both subjectively and clinically. No significant differences between the groups were found. The two treatments were thus equally effective in the short-term perspective in patients with signs and symptoms of mandibular dysfunction.
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| 4. |
- Gängler, P, et al.
(författare)
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Reactivity of young and old human enamel to demineralization.
- 1993
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 101:6, s. 345-9
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Tidskriftsartikel (refereegranskat)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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| 5. |
- Hakeberg, Magnus, 1954, et al.
(författare)
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A 10-year follow-up of patients treated for dental fear.
- 1990
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 98:1, s. 53-9
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Tidskriftsartikel (refereegranskat)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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| 6. |
- Larsson, Erik, et al.
(författare)
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Dummy- and finger-sucking habits in young Swedish and Norwegian children
- 1992
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 100:5, s. 292-295
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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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| 7. |
- Lundgren, Ted, 1959, et al.
(författare)
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Retrospective study of children with hypophosphatasia with reference to dental changes.
- 1991
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 99:5, s. 357-64
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Tidskriftsartikel (refereegranskat)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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| 8. |
- Molin, M, et al.
(författare)
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Plasma-selenium, glutathione peroxidase in erythrocytes and mercury in plasma in patients allegedly subject to oral galvanism.
- 1987
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 95:4, s. 328-34
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Tidskriftsartikel (refereegranskat)abstract
- Twelve patients with subjective symptoms, ascribed by the patients themselves to mercury released from dental restorations, were investigated. In addition to a general dental examination the following parameters were registered: the total number of amalgam surfaces in the mouth; potential and polarization of existing and accessible dental metallic restorations for calculation of intraoral currents. As regards the highest calculated intraoral current for each individual there was a statistically significant difference between the patient group and a control group consisting of 12 persons. An analysis of the amount of selenium, glutathione-peroxidase and mercury in the blood showed no differences between the patient and the control group. However, a statistically significant positive correlation could be seen between the total number of amalgam surfaces and the plasma-mercury level for patients and controls pooled together. The numerous other blood parameters analyzed did not reveal any differences between the groups.
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| 9. |
- Ranggård, L, et al.
(författare)
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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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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 102:5, s. 254-9
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Tidskriftsartikel (refereegranskat)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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| 10. |
- Ranggård, L, et al.
(författare)
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Effect of hypocalcemic state on enamel formation in rat maxillary incisors.
- 1994
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Ingår i: Scandinavian journal of dental research. - 0029-845X. ; 102:5, s. 249-53
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Tidskriftsartikel (refereegranskat)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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