22971. |
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Changing Trends in Antarctic Research
- 1993
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- This book gives an update 1993 on the then rapidly changing events surrounding the introduction of an environmental protection regime in Antarctica. The volume stems from an International Symposium in Göteborg, 30 Septembr - October 1, 1991 to mark the 3oth anniversary year of the Antarctic Treaty, with a special concluding chapter based on an evaluation 1991 of the activities of the Scientific Committee on Antarctic Research (SCAR). The evaluation was commissioned by ICSU and it was led by Professor Rita R. Colwell of the University of Maryland, at the time vice chair of NAS's Polar research Board. Individual chapters are based on conference presentations by Finn Solie (who had been involved in the drafting of the Antarctic treaty), Nigel Bonner (UK), Anders karlqvist (Sweden), Olav Orheim (Norway), James N. Barnes (ASOC), Bruce Davies (Australia), Barry Heywood (BAS, UK), Kent Larsson (Sweden), as well as prepared statements by Riita Mansukoski, Paul-Christian Rieber, Jan H. Stel, and Jarl-Ove Strömberg.
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22972. |
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22973. |
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22974. |
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22975. |
- Claesson, Silwa, 1947
(författare)
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Läraren i lärarkandidaten
- 1992
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Ingår i: Undervisningsmetodik. - Lund : Studentlitteratur.
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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22976. |
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22977. |
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22978. |
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22979. |
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22980. |
- Crona-Larsson, G, et al.
(författare)
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Effect of luxation injuries on permanent teeth.
- 1991
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Ingår i: Endodontics & dental traumatology. - 0109-2502. ; 7:5, s. 199-206
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Tidskriftsartikel (refereegranskat)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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