| 1. |
- Hudson, Lawrence N, et al.
(författare)
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The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
- 2017
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Ingår i: Ecology and Evolution. - : John Wiley & Sons. - 2045-7758. ; 7:1, s. 145-188
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Tidskriftsartikel (refereegranskat)abstract
- The PREDICTS project-Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)-has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.
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| 2. |
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| 3. |
- Abolfathi, Bela, et al.
(författare)
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The Fourteenth Data Release of the Sloan Digital Sky Survey : First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment
- 2018
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Ingår i: Astrophysical Journal Supplement Series. - : IOP Publishing Ltd. - 0067-0049 .- 1538-4365. ; 235:2
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Tidskriftsartikel (refereegranskat)abstract
- The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014-2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.
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| 4. |
- Aguado, D. S., et al.
(författare)
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The Fifteenth Data Release of the Sloan Digital Sky Surveys : First Release of MaNGA-derived Quantities, Data Visualization Tools, and Stellar Library
- 2019
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Ingår i: Astrophysical Journal Supplement Series. - : Institute of Physics Publishing (IOPP). - 0067-0049 .- 1538-4365. ; 240:2
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Tidskriftsartikel (refereegranskat)abstract
- Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (2014 July-2017 July). This is the third data release for SDSS-IV, and the 15th from SDSS (Data Release Fifteen; DR15). New data come from MaNGA-we release 4824 data cubes, as well as the first stellar spectra in the MaNGA Stellar Library (MaStar), the first set of survey-supported analysis products (e.g., stellar and gas kinematics, emission-line and other maps) from the MaNGA Data Analysis Pipeline, and a new data visualization and access tool we call "Marvin." The next data release, DR16, will include new data from both APOGEE-2 and eBOSS; those surveys release no new data here, but we document updates and corrections to their data processing pipelines. The release is cumulative; it also includes the most recent reductions and calibrations of all data taken by SDSS since first light. In this paper, we describe the location and format of the data and tools and cite technical references describing how it was obtained and processed. The SDSS website (www.sdss.org) has also been updated, providing links to data downloads, tutorials, and examples of data use. Although SDSS-IV will continue to collect astronomical data until 2020, and will be followed by SDSS-V (2020-2025), we end this paper by describing plans to ensure the sustainability of the SDSS data archive for many years beyond the collection of data.
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| 5. |
- Dawson, Victoria
(författare)
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Coronal restoration in root-filled and non root-filled teeth : studies on periapical status, tooth survival, subsequent treatments and treatment decisions
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The overall aim of this thesis was to study the following aspects ofdirect and indirect coronal restoration, primarily of root-filled teeth, withspecial reference to:• periapical health• the natural course of root-filled teeth, particularly furtherclinical intervention• the dentist´s decision-making process for root-filled teeth.The aims of coronal restoration are to restore the function and aestheticsof the tooth, with a tight marginal seal as protection from microbialleakage. A coronal restoration may be either direct, i.e. a direct chairsidecomposite or amalgam filling, or indirect, whereby the restoration,ceramic or a combination of metal and ceramic, is fabricated in alaboratory and then permanently cemented. For the root-filled tooth, acoronal restoration of adequate quality is an important factor for asuccessful outcome of the endodontic treatment, in terms of periapicalstatus. While indirect restoration is often advocated as the treatment of choice for a root-filled tooth, the procedure is nevertheless more timeconsumingand 3 – 4 times more expensive than a direct restoration. InSweden, composite is the predominant material for direct restorationand the majority of root-filled teeth are directly restored. However,some reports suggest an association between composite restoration andan increased risk of periapical disease. In terms of tooth survival, thereare also reports of less favorable endodontic treatment outcomes forteeth with direct restorations than for those with indirect restorations.In Studies I and II clinical and radiographic examinations wereundertaken in a random sample of 440 subjects, living in the county of Skåne, Sweden. No association was disclosed between apicalperiodontitis (AP) and direct composite restorations. In non root-filledteeth, a relationship was found between the type of restoration and AP.Those restored with direct restoration by both composite and amalgamcombined, and indirect restoration were associated with increased riskof AP, indicating that the extent of tooth substance removal rather thanthe type or material of the restoration, was an important factor ofinfluence on periapical status. For root-filled teeth, however, the qualityof the restoration and of the root-filling was more important toperiapical health than the type or material used for the coronalrestoration. In Study III, data from the Swedish Social InsuranceAgency on dental treatments were analyzed. Only minor differences inthe frequency of additional endodontic treatment for root-filled teethrestored with direct versus indirect restoration was disclosed. Theindirectly restored teeth also had a more favorable natural course duringthe 5-year follow-up period. In comparison, teeth restored with directrestorations required further clinical intervention (nonsurgical retreatment, extraction and additional restorations) significantly morefrequently.In Study IV, in-depth semi-structured interviews were conducted withgeneral dental practitioners. Data from 14 interviews were analyzed byQualitative Content Analysis. Study IV revealed that dentists´ decisionmakingprocess underlying the choice of coronal restoration for a rootfilledtooth, was based not only on clinical factors; contextual factorsand patient´s views, if in conflict, were decisive. Thus, despite theindications for an indirect restoration, a direct restoration wasoccasionally chosen. Accordingly, the context in which the dentistmakes decisions may be a factor influencing the fate of the root-filledtooth.It is concluded that concerns that composite restoration poses a riskfor periapical disease are not supported clinically, i.e. the use ofcomposite seems to be safe. While in non root-filled teeth, AP tended tobe associated with extensive restorations, in root-filled teeth the type ofrestoration was not an important factor of periapical health. For teethdirectly restored after root canal treatment, further clinical interventionsmay be expected, especially for restorative failures. This may beattributable in part to the dentist´s decision-making process with respectto the choice of coronal restoration.
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| 6. |
- Dawson, Victoria, et al.
(författare)
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Coronal Restoration of Root-filled Teeth : General Dental Practitioners' Decision-Making Process
- 2019
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Objectives: A better outcome has been shown for teeth restored with laboratory-fabricated crowns. This may not necessarily imply that full crowns are better than direct restorations, as it may be a result of selection bias. The aim was to describe the decision process regarding the choice of coronal restoration on a root-filled tooth from the perspective of the dentist. Methods: A strategic selection of 15 general dental practitioners (GDPs) in Sweden was performed. An absolute inclusion criterion was that the dentist had a recent experience of root canal treatments followed by a decision concerning permanent coronal restoration. The included dentists provided a variation concerning gender, age, work experience, location of undergraduate education and dental service provider. Semi-structured in-depth interviews were conducted with focus on the personal experience of the informant when choosing how to permanently restore the root-filled tooth. The informants were invited to, in their own words, narrate on the two latest occasions when this situation occurred for direct and full crown restorations respectively. The interviews were verbatim transcribed and then analyzed according to Qualitative Content Analysis, to be classified into an overall theme covering the latent content together with categories and subcategories illustrating the manifest content. Results: Preliminary results indicate a pattern, not yet definitely classified, but revealing the GDPs' efforts to take their current theoretical knowledge and clinical experience into consideration in the decision-making process together with an assessment of the residual tooth substance and the patients' oral health conditions. This is done parallel to an evaluation of and with certain emphasis to the patients' economic situation and preferences. Conclusions: The general dental practitioners' decision-making process regarding the choice of coronal restoration on a root-filled tooth was based not only on clinical factors: decisive for the decision was contextual factors comprising a patient centered approach.
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| 7. |
- Dawson, Victoria, et al.
(författare)
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Coronal restoration of the root filled tooth - a qualitative analysis of the dentists' decision-making process
- 2021
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Ingår i: International Endodontic Journal. - : Wiley. - 0143-2885 .- 1365-2591. ; 54:4, s. 490-500
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Tidskriftsartikel (refereegranskat)abstract
- Aim To describe the decision-making process of the general dental practitioner (GDP) underlying the choice of coronal restoration of a root filled tooth. Methodology GDPs were strategically selected with respect to gender, age, undergraduate dental school, service affiliation and duration of professional experience. Semistructured in-depth interviews were conducted, focusing on the informant's personal experience of the process which leads to a decision as to how to restore a root filled tooth. The informants were invited to describe in their own words the latest two cases involving decisions of direct or full crown restorations respectively. The interviews were digitally recorded and transcribed verbatim. Interviews from 14 informants, aged 27-64 (mean age 46 years), were included and analysed according to Qualitative Content Analysis. Results A theme (latent content) was identified: Clinical factors were considered important but were overruled by context and patient opinions, if in conflict. Three main categories, including seven subcategories (manifest content), were identified. The categories were clinical factors, contextual factors and patient's views. Clinical factors underlying the GDPs' decision included the current dental status and the estimated longevity of the intended restoration. In certain cases, contextual factors were also of importance, either supporting the GDPs' decision or modifying it. However, the patient's views played a decisive role in the final choice of coronal restoration, leading to either mutual acceptance or a compromise, taking into account the patient's economic status and opinions. Conclusions With respect to coronal restoration of a root filled tooth, the GDPs' decision-making process was based not only on clinical factors, but also on decisive contextual factors and consideration of the patients' views.
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| 8. |
- Dawson, Victoria, et al.
(författare)
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Endodontic complications in teeth with vital pulps restored with composite resins : a systematic review
- 2015
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Ingår i: International Endodontic Journal. - : John Wiley & Sons. - 0143-2885 .- 1365-2591. ; 48:7, s. 627-638
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Forskningsöversikt (refereegranskat)abstract
- Composite resin is used extensively for restoration of teeth with vital pulps. Although cell culture studies have disclosed harmful effects on pulpal cells, any untoward clinical effects, manifest as adverse pulpal responses, have yet to be determined. This study comprises a systematic review, designed to address the question of whether the risk of endodontic complications is greater with composite resin restorations than with other restorative materials, such as amalgam. The study methodology involved (i) formulation of the research question, (ii) construction and conduct of an extensive literature search with (iii) interpretation and assessment of the retrieved literature. A search of the medical database PubMed was complemented with a search of the Controlled Trials Register (CENTRAL). The initial search yielded 1043 publications, the abstracts of which were read independently by the authors. After additional searches, 10 studies were included in the review. In all the included studies, the level of evidence was assessed as low. No conclusions could therefore be drawn. The included studies reported few, if any, endodontic complications. Little or no differences emerged between teeth restored with composite resins and those restored with amalgam. To determine whether composite resin restorations of teeth with vital pulps are associated with an increased risk for development of endodontic complications such as apical periodontitis, further evidence is needed, from well-constructed studies with a large number of participants.
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| 9. |
- Dawson, Victoria, et al.
(författare)
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Further interventions after root canal treatment in relation to type of coronal restoration and tooth group : a 10-year follow-up of a Swedish dental register
- 2023
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Ingår i: ESE Wladimir Adlivankine Research Prize, Education Prize and Original Research Abstracts.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Aim: To investigate the frequency of further interventions after root filling during a follow-up of 10 to 11 years, and to compare the outcomes with respect to type of coronal restoration and tooth group.Methods: Data from the Swedish Social Insurance Agency´s register of dental treatments were obtained to identify the teeth registered as root filled in Sweden 2009. Type of coronal restoration within 6 months after root filling, as well as the frequency of further interventions (nonsurgical retreatment, periradicular surgery, extraction, further direct and indirect restoration) were tracked in the data register until December 31, 2019. Descriptive statistics and Chi-square tests were used for statistical analysis.Results: Of the 215 611 teeth root filled in 2009, nonsurgical retreatment, periradicular surgery, and extraction were registered for 3.5%, 1.4% and 20%, respectively. The highest frequency of nonsurgical retreatment was registered for molars (4.2%), and periradicular surgery was most frequent in maxillary canines and incisors (2.3%). The highest frequency of extractions was registered for mandibular molars (25.1%). Directly restored teeth had higher frequency of nonsurgical retreatment (3.9%) and extraction (20.8%), compared to indirectly restored teeth (1.7% and 13.6%, respectively; P < 0.001). Of teeth restored with direct restoration within 6 months after root filling, 41.5% were registered with at least one further direct restoration and 14.7% with an indirect restoration. In the group of indirectly restored teeth, 9.3% and 7.1% underwent further restorative treatment with direct and indirect restoration, respectively. The differences registered between directly and indirectly restored root filled teeth were statistically significant (P < 0.001).Conclusions: The frequencies of nonsurgical retreatment and periradicular surgery were low 10 to 11 years after root filling, despite one in five root filled teeth being registered as extracted. Further interventions were significantly more common for directly restored teeth than for those indirectly restored.
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| 10. |
- Dawson, Victoria, et al.
(författare)
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Further Treatments of Root-filled Teeth in the Swedish Adult Population: A Comparison of Teeth Restored with Direct and Indirect Coronal Restorations
- 2017
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Ingår i: Journal of Endodontics. - : Elsevier BV. - 0099-2399 .- 1878-3554. ; 43:9, s. 1428-1432
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: The aim of this study was to evaluate the frequencies of nonsurgical retreatment, root -end surgery, extraction, and further restoration of root -filled teeth in Sweden in 2009 during a follow-up period of 5 years and to compare the outcomes in teeth restored with direct or indirect restorations. Methods: Data from the Swedish Social Insurance Agency were analyzed, and the frequencies of nonsurgical retreatment, root end surgery, extractions, and further restoration were calculated for all teeth registered as root filled during 2009. Chi-square tests were applied to detect any significant differences in the frequency of further treatment in teeth registered as restored with either a direct or an indirect restoration within 6 months of root filling. Results: Of the 248,299 teeth reported root filled in Sweden in 2009, nonsurgical retreatment was registered in 2.2%, root -end surgery in 1.0%, and extractions in 9.2% during the follow-up period. Of the teeth restored with a direct restoration within 6 months after the root filling, 30.3% were registered as having undergone at least 1 further direct restoration; the corresponding percentage of teeth with indirect restorations was 6.4%. A statistically significant difference in the frequency of nonsurgical retreatment, extraction, and further restoration was found; teeth restored with an indirect restoration within 6 months of root filling had fewer of these treatments than those restored by direct restoration. Conclusions: Low frequencies of nonsurgical retreatment and root -end surgery were reported 5 years after root filling, whereas extraction was more common. Fewer additional treatment procedures were registered for teeth with indirect restorations than for those with direct restorations.
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