| 31. |
- Fagrell, Tobias G, et al.
(författare)
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Aetiology of severe demarcated enamel opacities--an evaluation based on prospective medical and social data from 17,000 children.
- 2011
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Ingår i: Swedish dental journal. - : Swedish Dental Journal (Sveriges Tandlakarforbund). - 0347-9994. ; 35:2, s. 57-67
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Tidskriftsartikel (refereegranskat)abstract
- During the 1970s dentists reported an increasing prevalence of a "new" type of enamel disturbance.The disturbance was very specific, with areas of demarcated hypomineralised enamel, and was mostly found in permanent first molars and incisors. Several studies have tried to reveal the aetiology behind the enamel disturbance but sofar no clear factors correlated have been found. The aim of the present study was to evaluate aetiological factors to severe demarcated opacities (SDO) in first permanent molars in a large cohort of children enrolled in the "All Babies in Southeast Sweden" (ABIS) project. ABIS is a prospective study of all children in five Swedish counties born between Oct 1, 1997 and Oct 1, 1999, in all about 17,000 children.They have been followed from birth with recording of a large number of factors on nutrition, diseases, medication, infections, social situation etc. With help from 89 Public Dental Service clinics in the same area preliminary examinations of the children, born between Oct 1,1997 and Oct 1,1999, reported 595 children with severe demarcated opacities (SDO) in first molars.These children and a randomly selected age matched group of 1,200 children were further invited to be examined by specialists in paediatric dentistry. At these examinations 224 severe cases were identified as well as 253 children completely without enamel disturbances among children registered in ABIS.These two groups were analysed according to any correlation between SDO and variables in the ABIS databank. The analyses showed no association between SDO and pre-, peri-, and neonatal data. However, we found a positive association between SDO and breastfeeding for more than 6 months (OR 1.9; 95% CI 1.1-3.2), late introduction of gruel (OR 1.9; 95% CI 1.1-2.9), and late introduction of infant formula (OR 1.8; 95% CI 1.2-2.9). A combination of these three variables increased the risk to develop SDO by more than five times (OR 5.1; 95% CI 1.6-15.7). No significant associations were found to other environmental, developmental, or medical factors. We conclude that nutritional conditions during first 6 months of life may influence the risk to develop severe demarcated opacities in first permanent molars.
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| 32. |
- Fagrell, Tobias G, et al.
(författare)
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Onset of molar incisor hypomineralization (MIH).
- 2013
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Ingår i: Swedish dental journal. - 0347-9994. ; 37:2, s. 61-70
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Tidskriftsartikel (refereegranskat)abstract
- The etiological factors and timing of the onset of molar incisor hypomineralization (MIH) are still not clear. The aim of this study was to examine ground radial and sagittal sections from teeth diagnosed with MIH using light microscopy, polarized light microscopy and X-ray micro-computed tomography (XMCT) and to estimate the onset and timing of the MIH and to relate the hypomineralized enamel to the incremental lines. Thirteen extracted permanent first molars diagnosed MIH, were analyzed with light microscopy and XMCT. The hypomineralized areas were mainly located in the mesio-buccal cusps, starting at the enamel-dentin-junction and continuing towards the enamel surface. In a relative gray scale analysis the values decreased from the EDJ towards the enamel surface. The findings indicate that the ameloblasts in the hypomineralized enamel are capable of forming an enamel of normal thickness, but with a substantial reduction of their capacity for maturation of enamel. Chronologically, it is estimated that the timing of the disturbance is at a period during the first 6-7 months of age.
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| 33. |
- Frisk, Fredrik, 1971, et al.
(författare)
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Pulp exposures in adults--choice of treatment among Swedish dentists.
- 2013
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Ingår i: Swedish dental journal. - : Sveriges tandläkarförbund. - 0347-9994. ; 37:3, s. 153-60
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Tidskriftsartikel (refereegranskat)abstract
- This study comprises a survey of Swedish dentists'treatment preferences in cases of carious exposure of the dental pulp in adults.The survey was conducted as part of a comprehensive report on methods of diagnosis and treatment in endodontics, published in 2010 by the Swedish Council on Health Technology Assessment. A questionnaire was mailed to a random subsample of 2012 dental offices where one dentist at each office was requested to answer all questions. Each questionnaire contained one of three sets of questions about endodontic practice routines.Thus around one-third of the subsample received case-specific questions about treating carious exposure. Only general practitioners aged below 70 years were included.The final study sample comprised 412 participants.The dentists were presented with two case scenarios. In Case 1 a 22-year old patient had a deep carious lesion in tooth 36 and in Case 2 a 50-year old patient had a deep carious lesion in tooth 14.The participants were asked to nominate their treatment of choice: pulp capping, partial pulpotomy or pulpectomy. For Case 1, 17 per cent of the respondents selected pulpectomy; the corresponding rate for Case 2 was 47 per cent. Female gender and age group 25-49 years were predictive of selection of less invasive treatment options. However, according to recent guidelines (2011) from the National Board of Health and Wellfare, Swedish dentists are recommended to elect pulpectomy prior to pulp capping/partial pulpotomy when confronted with a tooth having a cariously exposed pulp in adults.
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| 34. |
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| 35. |
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| 36. |
- Goransson, H., et al.
(författare)
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The adoption of nickel-titanium rotary instrumentation increases root-filling quality amongst a group of Swedish general dental practitioners
- 2014
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Ingår i: Swedish Dental Journal. - 0347-9994. ; 38:1, s. 15-22
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was testing the hypothesis that the adoption of nickel-titanium rotary instrumentation (NTRI) will improve the technical quality of root-fillings.The investigation was carried out within a mandatory continuing education program (CEP) for general dental practitioners (GDPs). The study was conducted amongst GDPs employed by the Public Dental Health Service in the County of Stockholm. Identical questionnaires were distributed before the CEP (Pre-Q) and 9 to 12 months after the course (Post-Q).The CEP consisted of two parts: lectures and hands-on training. From each GDP, radiographs of two cases completed before the course and two cases treated 9-12 months after the course were randomly selected. Primarily molars were selected for evaluation.The radiographs were individually evaluated by two endodontists.Teeth treated before and after training were presented in random order. Adoption rate of NTRI increased from 35% to 75%. Cases from 124 GDPs were included in the final analysis.The rate of good quality root-fillings increased from 27% to 49% (p<.001). A significantly increased radiographic quality was found between GDPs adopting NTRI and those who did not.The GDPs produced root-fillings of very poor quality before as well as after the training period. However, the rate decreased from 29% to 12% amongst adopters and from 46% to 28% amongst non-adopters. Dentists considering canal preparation and root-filling as "easy" produced more frequently good quality root-fillings than the others (p
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| 37. |
- Gross, Heidi, et al.
(författare)
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Detectability of normal anatomy in digital panoramic radiographs
- 2014
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Ingår i: Swedish Dental Journal. - : Swedish Dental Federation. - 0347-9994. ; 38:4, s. 179-185
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate the image quality of digital panoramic radiographs and its correlation with the detectability of normal anatomical structures. The effects of image enhancement on the detectability were also studied. A total of 500 panoramic images (DICOM format) obtained with a storage phosphor-based digital system were evaluated. The image quality and the detectability of selected normal anatomical structures were evaluated in all images. Images with inadequate image quality were subjected to enhancement after which the detectability of the structures was re-evaluated. Only 9% of the images were classified as having adequate technical quality. The main sources of poor image quality were that the patient's tongue was not held against the palate and incorrect positioning of the patient. Not holding the tongue against the palate was found to have a negative impact on the detectability of maxillary structures. Of the images with horizontal positioning errors the patient's head was rotated to the left in 81% (70 images). The most effective form of enhancement was a combination of increased contrast and decreased brightness. Images in which the tongue was not held against the palate were partially improved, whereas images with positioning errors remained unaffected by this enhancement. In conclusion, most of the panoramic images showed some technical flaws. The marginal bone level and the maxillary area were the most difficult areas to reproduce. Retakes could be avoided in some cases by using image enhancement. However, this should not be regarded as an option to avoid poor image quality.
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| 38. |
- Göranson, Emma, et al.
(författare)
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Outcome of orthodontic care and residual treatment need in Swedish 19-year-olds
- 2014
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Ingår i: Swedish Dental Journal. - : SWEDISH DENTAL JOURNAL. - 0347-9994. ; 38:3, s. 133-142
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of the study was to assess the outcome of orthodontic care in Linkoping, Sweden. The dental records of 207 (107 M,100 F) 19-year-olds registered at one public dental health clinic were studied. A clinical examination was performed where malocclusions were registered, where after residual orthodontic treatment need was measured using the Index of Complexity, Outcome and Need (ICON). The 19-year-olds also filled in a questionnaire regarding residual subjective orthodontic treatment demand. Differences between genders were analysed. One hundred and ten (47 M, 63 F) individuals (53.1%) had partaken in orthodontic consultations. Orthodontic appliance treatment had been received by 86 (38 M, 48 F) individuals (41.6%). A residual orthodontic treatment need was registered in 28 (22 M, 6 F) individuals (13.5%). Residual subjective orthodontic treatment demand was expressed by 9 (3 M, 6 F) individuals (4.3%). Eight (2 M, 6 F) of those had no residual treatment need. A higher (p=0.006) rate of females (63.0%) than males (44.0%) had participated in orthodontic consultations. The proportion of males (35.5%) who had experienced orthodontic treatment was not significantly lower (p=0.069) than among the females (48.0%). However, a lower (p=0.009) proportion of treated males (55.3%; n=21 out of 38) than of treated females (81.3%; n=39 out of 48) had received their treatment by orthodontic specialists. At 19 years of age, the proportion of males with residual treatment need (20.6%) was higher (p=0.002) than among the females (6.0%). Every patient with orthodontic treatment need and -demand at 19 years of age had previously been offered orthodontic treatment. The conclusion was drawn that the orthodontic care scheme had successfully diagnosed and treated orthodontic problems in the population. However, notable differences between genders regarding treatment modalities and the amount of residual treatment need at age 19 were found.
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| 39. |
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| 40. |
- Haag, Per, et al.
(författare)
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Firing temperature accuracy of four dental furnaces.
- 2011
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Ingår i: Swedish Dental Journal. - : Swedish Dental Association. - 0347-9994. ; 35:1, s. 25-31
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Tidskriftsartikel (refereegranskat)abstract
- In spite of using recommended firing and displayed temperatures, low-fired dental porcelain more often demonstrates unsatisfactory results after firing than porcelain fired at higher temperatures. It could therefore be anticipated that temperatures shown on the display are incorrect, implying that the furnace does not render correct firing programs for low-fired porcelain. The purpose of this study is to investigate deviations from the real temperature during the firing process and also to illustrate the service and maintenance discipline of furnaces at dental laboratories. Totally 20 units of four different types of dental furnaces were selected for testing of temperature accuracy with usage of a digital temperature measurement apparatus, Therma 1. In addition,the staffs at 68 dental laboratories in Sweden were contacted for a telephone interview on furnace brand and on service and maintenance program performed at their laboratories. None of the 20 different dental furnaces in the study could generate the firing temperatures shown on the display, indicating that the hypothesis was correct. Multimat MCII had the least deviation of temperature compared with displayfigures. 62 out of 68 invited dental laboratories chose to participate in the interviews and the result was that very few laboratories had a service and maintenance program living up to quality standards. There is room for improving the precision of dental porcelain furnaces as there are deviations between displayed and read temperatures during the different steps of the firing process.
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