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Browsing by Author "Weinberg, R. Bernd"
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Item An Analysis of Possible Factors Affecting the Soft Tissue Response in Postadolescent Orthodontic Patients(1975) Cowan, Richard Edward; Garner, LaForrest D.; Potter, Rosario H.; Mitchell, David F.; Tomich, Charles E.; Hutton, Charles E.; Weinberg, R. BerndThis study was carried out to evaluate the factors which may vary the soft tissue response in non-growing subjects. Pretreatment and post-treatment lateral cephalometric radiographs of twenty-nine postadolescent orthodontic patients were measured with a sonic digitizer using facial plane as the reference. Stepwise multiple regression analysis was performed to select those factors from the original set of 6 according to the statistical significance of their contribution in the prediction of the soft tissue response. It was found that 30.84% of the horizontal upper lip response is due statistically to the maxillary incisor change and the pretreatment upper lip thickness at the vermillion border. This study also revealed that 67.76% of the horizontal lower lip response is due statistically to the mandibular incisor change, the pretreatment upper lip thickness at A-Point, and the mandibular postural change. Additionally, 16.50% of the vertical upper lip response is due statistically to the mandibular incisor change. Further, 33.39% of the vertical lower lip response is due statistically to the mandibular postural change and the pretreatment upper lip thickness at A-Point. Finally, the majority of the total variation in lip response is still not accounted for and therefore further research is needed.Item A Cephalometric Investigation of Cleidocranial Dysplasia(1974-06) Davis, James Paul; Garner, LaForrest D.; Tomich, Charles E.; Bixler, David; Weinberg, R. Bernd; Dirlam, James H.The characteristics of cleidocranial dysplasia were first reported in 1897 by Pierre Marie and Paul Sainton. Since this first classification of the disease, many radiographic and clinical signs have been associated with this entity. Individuals with this disease have been repeatedly described as having a relative prognathism of the mandible due to a small, retropositioned maxilla and an enlarged cranial base. The present study was designed to determine, through the use of cephalometric measurements, if there is truly a difference in the size and position of the maxilla and an enlargement of the cranial base in these affected individuals. Ten cleidocranial dysplasia patients ranging in age from three years to 53 years, and their immediate families were studied. Non-affected members were studied to provide an intrafamilial comparison of skeletal development. The data obtained from the cephalometric measurements showed that the cranial bases for this group were within normal limits, or tending towards the small size. The maxilla was of normal size and the position was normal or anteriorly positioned in all cases. The mandible was considerably larger in 70% of the affecteds studied. Radiographic investigation showed this group to have delayed ossification of cranial sutures and mandibular symphysis. Absent frontal and mastoid sinuses, orbital hypertelorism, osteopetrotic appearance of the cranium, and absent or hypoplastic nasal bones were also observed.