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Browsing by Subject "Maxillofacial Development"
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Item A Cephalometric Evaluation of the Integumental Profile of French Canadian Children(1972) Remise, Claude H.This study was undertaken in order to obtain standards on the soft tissue facial contour in a French Canadian sample based on analysis of lateral head-plates. Twenty boys and twenty girls were studied longitudinally from 6 to 9 years of age and the same was applied to twenty children of each sex followed from 10 to 13 years of age. No attention was paid to the occlusion and the cases were chosen on the sole basis of acceptable facial profile. The results are analysed and further investigations to be done are described.Item Individualized, Computerized Growth Prediction(1970) Fortuño Buxó, JorgeThis investigation was conducted to individualize growth prediction by use of regression formulas and therefore supplement the present method of using mean incremental data obtained from case study. There were 30 normal individuals, ages 8 to 19 years, 14 males and 16 females. Based on the analysis of serial headplates, the incremental growth change for 12 variables to be used in growth prediction was calculated for each individual for each 3 year period until adulthood was reached. Cephalometric measurements, consisting of 39 variables, were made at the beginning of each 3 year period. For every age group the following information was fed into a computer: a.) The known incremental growth change for each 3 year for the 12 variables to be used in prediction. b.) The known measurements of the 39 variables at the beginning of each 3 year period. The computer selected from the 39 variables only those which best predicted the already known incremental growth change of the 12 variables to be used in prediction. A total of 101 regression formulas of a possible 108 was obtained for males, and 102 for females, with a high multiple correlation. A sign test at .05 level of confidence was used to determine if this regression formula method was significantly better than the mean incremental method presently used at Indiana University. The results showed that, in the majority of the cases, the regression method proved to be significantly better than the mean incremental method. In none of the cases was the man incremental method significantly better.Item Long Term Maxillary Growth Following Primary Bone Grafting in Unilateral Cleft Lip and Palate(1996) Gandelsman, Genrikh; Hathaway, Ronald R.; Arbuckle, Gordon R.; Hennon, David K.; Katona, Thomas R.; Shanks, James C.The question of growth attenuation of the maxillary complex arises in connection with primary osteoplasty procedure. The deficiencies associated with the development of the jaws in unilateral complete cleft lip and palate (UCLP) children is an ongoing problem in terms of growth inhibition and orthodontic treatment. Retardation of growth can be attributed to intrinsic cleft factors and/or associated with the treatment of the cleft condition. In this study, the extent of such deficiency, if any, was investigated by assessing arch length, arch width, arch symmetry and inter-arch harmony. Seventeen orthodontic casts of UCLP children (mean age 7 years 11 months) were obtained. All were treated with a primary osteoplasty at James Whitcomb Riley Hospital for Children at Indianapolis, Indiana. The sample was compared to an age and sex matched non-cleft control group (n=38). None of the subjects had undergone orthodontic treatment beyond infant maxillary orthopedics. Anatomic landmarks were identified and digitized by means of optical electronics. The data were automatically fed into a computer which executed preprogrammed data manipulation algorithms. Significant (p<0.05) inhibition of growth has taken place in the maxillary arches of the UCLP group in both anteroposterior and transverse directions. lntercanine width (ICW) was reduced on average by 7.6 mm (23.6 percent) while the intermolar width (IMW) was shortened by 3.9 mm (7.8 percent). Sagittal growth was retarded by 5.5 mm (17.4 percent). A gradient of "normalization" originating at a point of surgical insult was observed anteroposteriorly in the transverse maxillary dimension. In the mandible, ICW was retarded by 2.0 mm (7.8 percent) while IMW and A-P growth vectors were not significantly affected. This investigation also revealed significant (p = 0.0001) differences in the size of the maxillary anterior palatal area (cleft mean = 83.5 mm2, non-cleft mean = 133.9 mm2). These findings lead to the conclusion that primary osteoplasty may contribute to maxillary growth attenuation with concomitant mandibular compensatory growth patterns.Item The Integumental Profile : A Study of Black American Children(1974) Sturrup, Randolph W.; Garner, LaForrest D.; Shafer, William G.; Shanks, James C.; Potter, Roario H.; Barton, PaulThis study was undertaken to obtain standards on soft tissue facial contour in black American children, based on an analysis of cephalometric lateral headplates. A sample of black children (10 boys and 10 girls between 10 and 14 years of age) was compared to a white sample of comparable age. The following 20 profile measurements were made and subjected to statistical analysis: Upper lip protuberance, lower lip protuberance, soft tissue profile, anterior nose length, nasal angle, naso-labial angle, upper lip inclination, lower lip inclination, esthetic plane to upper lip, esthetic plane to lower lip, mandibular sulcus, maxillary sulcus, upper lip length, upper lip to upper incisor, lower lip length, height of soft tissue chin button, point A to subnasale, upper lip thickness, and soft tissue chin button. There were significant differences between the white and black samples in all but the following five measurements: Soft tissue convexity, maxillary sulcus depth, upper lip to upper incisor, and soft tissue chin button. There were no statistically significant differences between the measurements for black males and females except that the measurement from upper lip to maxillary incisor was significantly greater in the black male. On the basis of the findings in this limited study, it appears that morphologic standards derived from one ethnic group should not be applied to individuals of another ethnic group.