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Biomedical subjects

V Skieller

Publications and source records attributed to V Skieller.

18 recordsLinked to original sources
PubMed1990

A comparative study of two different methods of measuring stature and the velocity of growth in children and adults.

The stretched technique of measuring the stature described by Tanner (1962) is claimed to minimize the variation which occurs during the course of the day. This study examines differences in the calculated growth rate for the stretched and the conventional methods. The data for the analysis was drawn from a larger longitudinal growth study (Björk, 1968), where the stature of the individuals was measured both by the conventional unstretched technique according to Hrdlicka (1939) and by the stretched method described by Tanner (1962). A total of 84 individuals (48 boys and 36 girls) representing a total of 805 measurements of stature for each of the methods were included in the study. The individuals were measured annually until adult age, after which the measurements were made at intervals of 2-5 years. This represents a total range of 6-32 years of age, with individual series of observation varying over a period of 4-16 years. In accordance with the definition the stature measured by the stretched technique was significantly higher than measured by the unstretched method. The growth rate, however, at any age level did not differ significantly for the two methods and the variability in growth rate was the same. It was concluded that the unstretched technique gives similar values for estimating growth-velocity curves as does the stretched technique.

Adolescent↗
PubMed1985

Contrasting mandibular growth and facial development in long face syndrome, juvenile rheumatoid polyarthritis, and mandibulofacial dysostosis.

The complex rotation process of the mandible during growth is elucidated by longitudinal roentgencephalometric analyses, using metallic implants as fixed references. Contrasting development of face and mandibular shape is described in three subjects. In the so-called long face syndrome, development is characterized by increasing inclination of the mandible during growth with only moderate remodeling. In the subjects with juvenile rheumatoid polyarthritis and mandibulofacial dysostosis, the increase in mandibular inclination is moderate. However, the mandibular corpus rotates backward to an extreme extent within the more stable soft tissue matrix, giving rise to the characteristic development of angular notching with an extended angular process at the lower border.

Arthritis, Juvenile↗
PubMed1984

Prediction of mandibular growth rotation evaluated from a longitudinal implant sample.

The aim of this study was to estimate the possibility of predicting the direction and the amount of growth rotation of the mandible on the basis of morphologic criteria observed on a single profile radiograph at pubertal age. The difficulty in such an analysis is due to the fact that the actual growth rotation cannot be evaluated from radiographs by measurements at outer bony contours subjected to remodeling. The sample consisted of twenty-one persons in whom the actual mandibular growth rotation was determined from metallic implants over a 6-year period at around the time of puberty. Morphologic features from the first profile radiograph could therefore be compared with the observed growth changes over the study period and their predicting values calculated. A total of forty-four morphologic variables were employed and the data were analyzed by multivariate statistical methods. For each person, the variables which, alone and in combination, showed the highest predictive value with respect to total mandibular growth rotation are specified. The four variables which, in combination, gave the best prognostic estimate (86%) of mandibular growth rotation in this sample are (1) mandibular inclination, represented by three alternatives--(a) Index I (proportion between posterior and anterior facial height, (b) lower gonial angle (GOL), (c) inclination of lower border (NSL-ML1); (2) intermolar angle (MOLs-MOLi); (3) shape of lower border (ML1-ML2); and (4) inclination of symphysis (CTL-NSL). The statistical analysis was based on a sample of extreme cases. In children with a more normal growth pattern, these features may be less developed. The concordance between the predicted and the observed growth changes is illustrated graphically for each person.

Adolescent↗
PubMed1981

Abnormalities of the cranial base in cleidocranial dysostosis.

The purpose of the present investigation was to describe the size, shape, and morphologic characteristics of the cranial base in adult patients with cleidocranial dysostosis in an attempt to contribute to an improved understanding of the syndrome. The sample comprised seventeen patients with cleidocranial dysostosis, eight males and nine females aged 16 to 46 years. The morphology was evaluated from lateral cephalometric radiographs and midsagittal tomograms of the cranial base. The size of the anterior and posterior cranial base and the cranial base angle were compared to normative data. In addition, a qualitative screening for abnormal morphologic traits in the cranial base was carried out. The anterior and posterior cranial base was significantly shorter and the cranial base angle smaller in the syndrome groups than in the control groups. Patients with cleidocranial dysostosis exhibited high frequencies of anomalous traits in the cranial base, the most striking being a distortion of the clivus. In 82 percent the clivus was flexed, with the convexity toward the endocranium. All patients exhibited bulbous dorsum sellae, and 47 percent had small pituitary fossae. It is suggested that bone remodeling showed less resorption than normal in the craniofacial region of patients with cleidocranial dysostosis.

Adolescent↗