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Biomedical subjects

J Håkansson

Publications and source records attributed to J Håkansson.

15 recordsLinked to original sources
PubMed1992

Comparison of panoramic and intraoral radiography and pocket probing for the measurement of the marginal bone level.

Panoramic, bitewing and periapical radiography and probing for measurement of the marginal bone level were compared. Altogether 237 sites of 23 patients were examined. Radiographs were taken with a splint containing steel balls to allow calculation of the enlargement of the radiographs. Probing was done before and during flap surgery using the same splint. The open bone measurement represented the true value. All radiographs were assessed by 5 observers. The mean enlargement of panoramic radiography was 27% in the upper and 26% in the lower arch. For bitewing and periapical radiography, it was 8% in the upper and 4-5% in the lower arch. All methods underestimated the bone loss. Probing bone level before surgery was most accurate, deviating at most 5% from the true value. Periapical radiography was more accurate than panoramic and bitewing radiography (p less than 0.001). Panoramic radiography presented a slightly lower mean accuracy than bitewing radiography (p less than 0.05). The underestimation of the bone loss ranged from 13 to 32% in orthopantomograms, 11-23% in bitewing and 9-20% in periapical radiographs. The interobserver variation of the radiographic methods was substantial.

Adult↗
PubMed1991

Follow-up study of endodontic status in an adult Swedish population.

The purpose of this study was to examine changes in the endodontic status of selected teeth in a population over time, in order to get a long-term perspective of endodontically treated teeth. A random sample of the adult Swedish population was selected in 1974 and offered a clinical and radiographic examination. Eleven years later 351 of the selected persons attended a follow-up examination (1985). In radiographs, covering the mandibular premolar and molar regions, the status of 1974 was directly compared, tooth by tooth, with the status of 1985. The results showed that a number of endodontically treated teeth with an apical periodontitis healed during the observation period. During the same period, approximately the same number of endodontically treated teeth presented with a new apical periodontitis. This finding suggested that cross-sectional studies could provide reliable information on the long-term success rate of endodontic treatment at the population level. The periapical lesions that persisted or developed during the observation period were strongly related to incomplete root canal obturation, which is in agreement with observations in follow-up studies from teaching and specialist clinics.

Adult↗
PubMed1989

Comparison between panoramic and posterior bitewing radiography in the diagnosis of periodontal bone loss.

A study is reported comparing the diagnostic yield of panoramic and posterior bitewing radiographs when used to image periodontal bone disease. It is concluded that there is a high concordance between the findings from the two types of radiographs but that the concordance varies with the degree of bone loss and tooth type. Consequently when panoramic radiography is used in clinical practice, the examination should be supplemented by intraoral radiographs in regions when image quality is poor in the panoramic image and where there are structures of special interest.

Adult↗
PubMed1989

General oral status in adults with rheumatoid arthritis.

The oral status of an adult population of 204 patients with rheumatoid arthritis (RA) was compared with that of an age and sex-matched random sample of non-rheumatic subjects. The percentage of edentulous subjects, number of existing teeth in dentate subjects, prevalence, and quality of fixed and removable prostheses and prevalence of disorders of the stomatognathic system was recorded. The percentage of edentulousness among RA-patients was 17% and among non-RA subjects 19%. Number of remaining teeth was equal. 75% of removable partial and 62% of complete dentures among RA-patients were considered unsatisfactory compared to 25% and 56% respectively among non-RA subjects. Disorders related to the TMJ occurred much more frequently among RA-patients than among non-RA subjects. It is suggested that thorough stomatognathic examination and TMJ-prophylaxis be included in the overall care of RA-patients.

Adult↗
PubMed1989

Marginal bone in periodontal disease: an evaluation of image quality in panoramic and intra-oral radiography.

Five observers assessed the panoramic and full-mouth (14 periapical and four posterior bitewing) radiographs of 20 patients each for the ability to interpret and measure the marginal bone level. The image quality of each site was classified as excellent, acceptable or unacceptable. Depiction errors affecting interpretability and measurability were also noted. In the upper arch, the frequency of uninterpretable and non-measurable sites was almost equal for panoramic and periapical radiography. Image quality was better with periapical radiography in the lower arch. In the posterior regions of both arches, more sites could not be measured from panoramic compared with bitewing radiographs. Due to overlapping the distal surface of the maxillary canine and the mesial surface of the first maxillary premolar could often not be interpreted in either panoramic or periapical radiographs, but infrequently in the bitewings. In the lower arch, the most frequent depiction error was inadequate density in the incisor region of panoramic radiographs. On the basis of these results, we proposed that in clinical practice the panoramic radiograph can be supplemented with individually selected periapicals. In epidemiological studies, the panoramic radiograph should be combined with a premolar bitewing radiograph.

Adult↗
PubMed1985

The interest taken by Swedish dentists in subsequent training during 1981 and 1982.

The interest taken by the Swedish dental profession in subsequent training was studied by reviewing the frequency of enrollments for courses of the Swedish Dental Federation's programmes for 1981 and 1982. Interest was studied with reference to age, sex, locality of residence and form of professional activity and in relation to different types of courses. Results reveal that more than 70% of the dentists showed an active interest in subsequent training. Enrollments are more widespread among public dentists while the private practitioners, applying for more courses per individual, account for 50% of all enrollments. Interest is equally distributed between men and women in the profession. Dentists born before 1926 display a lower level of interest. There are no differences between the other age groups in this respect.

Adult↗