Tandlaegebladet最新文献

Comparative study of treatment of keratocysts by enucleation, enucleation combined with cryotherapy or treatment with Carnoy's solution followed by enucleation: a preliminary report. The aim of this preliminary report was to compare the effect on the recurrence rate of keratocysts treated by enucleation (group E, 14 cysts), enucleation combined with cryotherapy (group EK, 14 cysts) or a fixing agent (Carnoy's solution) followed by enucleation (group CE, 10 cysts). A total of 32 patients with 38 keratocysts are included in the study. In group E 5 recurrences (36%) was developed after 17, 34, 36, 37 and 39 months postoperatively, whereas 5 recurrences (36%) after 22, 24, 24, 25 and 59 months was registered in group EK. Due to a rather high incidence of side effects to cryotherapy this treatment technique can not be recommended. No recurrences has been found in group CE, and usually complete bone healing has occurred after 6 to 12 months postoperatively. Due to the use of the strong fixing agent we recommend treatment by this method performed under general anaesthesia to secure an immobile surgical field. In accordance with recent studies, the results indicate that fixation before enucleation has revolutionized the art of treating keratocysts with respect to recurrence rate.

The aim of the study was to evaluate and compare the results of treatment achieved with the Brånemark implantsystem in patients treated in our hospital and patients treated in surgical practice. This study includes 96 patients who received a total of 457 implants. Fifty-two patients were treated in the hospital with 304 implants and 44 patients were treated in practice with 153 implants. Most of the patients treated in the hospital received fixed bridges after a total jaw implant reconstruction. In this group complicating medical diseases and severely altered jaw anatomy have influenced the treatment results for which reason 37 (12%) of implants installed were lost. Treatment of partially edentulousness and single tooth loss with implants was dominating in the group of patients treated in surgical practice. In this group only 3 (2%) implants installed were lost. The results of the present study are comparable with other published reports and indicates that Brånemark implants has a predictably good prognosis. Furthermore, this study has shown that implant treatment significantly improve the prosthodontic function in patients suffering from edentulousness.

Questionnaires were sent to 22 dental practitioners. Each dentist was sent two types of questionnaires, one to be completed by the hygienist and the other one by the patients. The sampling was done by selecting at random approximately every sixth clinic employing a dental hygienist. Of 1100 questionnaires 710 were completed and returned. The investigation illustrates the patients opinion on different aspects of the dental hygienist's technical and social skills and of the cost of care. There was an overwhelming consumer satisfaction regarding the quality, as well as the cost, of dental care performed by a hygienist. Therefore, a broad use of well qualified dental hygienists as an auxilliary to a dentist is one way to lower the cost of dental health care in the future.

A patient with side effect of chlorhexidine gluconate is presented. The patient showed major changes of the oral mucosa after extreme overdosage of mouthrinsing with chlorhexidine gluconate. The changes were different from other known mucosal lesions, as the patient showed thickening of the mucosa, clinical resembling leukoplakia. The changes disappeared after decreasing the dosage of the drug.

The lead foil of dental x-ray film packets may cause a number of artifacts; especially well known are the "tractor treads" and "herringbone patterns" following a backward filmpositioning in the patient's mouth. In the present paper a specific and seldomly occurring lead foil artifact is described which is caused by bending of the film packet. Four cases collected over a 5-year period are presented. Although different the four cases show a number of similarities. They appear as radiopaque areas covering the upper or lower halves of the films. Their borders show the characteristic "sandbar-pattern" previously described by the author. The explanation of their origin is that the patient has been occluding on a part of the film packet which has been bent to a nearly horizontal position. The x-rays directed against the edge of the lead foil will be absorbed causing irregular radiopaque areas on the film lined by "sandbar-pattern". When the film packet is bent, the lead foil will be stretched and drawn a little away from the edges of the films. Consequently the x-rays will be able to expose the edges of the films. Irregularities of the foil will give rise to concentric "bars". The lead foil is only of limited radiopacity, but due to the oblique direction of the x-rays through the foil the absorbing effect is intensified.

In continuation of a previous paper on the principles in formation of "ghost images" on rotational panoramic radiographs five unusual and illustrative cases are presented. They demonstrate the influence of the position of the true object in relation to that of the rotation center. The dimensions of the ghost image inform of the distance between the center and the true structure. If the height is uniform it means that the true object is the seat of the rotation center. A ghost image may appear narrower or broader than the true structure, if its dimensions differ in various viewing angles.