Browsing by Author "Kasle, Myron J."
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Item A Study of the Effectiveness of Topical Fluoride Treatment Following the Removal of Direct Bonded Brackets(1976) Short, Steven T.; Garner, LaForrest D.; Kasle, Myron J.; Cunningham, Donald M.; Shanks, James C., Jr.; Barton, Paul; Phillips, Ralph W.In this investigation an attempt was made to determine what effect direct bonded attachments have on the posttreatment uptake of topically applied fluoride. Thirty-two freshly extracted mandibular central and lateral incisors were used. The teeth were cleaned, labeled and an adhesive tape window applied to the crown exposing a circular area one quarter inch in diameter on the labial surface. An initial enamel biopsy was performed to determine the fluoride content of the labial surface. Fifty percent phosphoric acid was applied for one minute to condition the teeth for bonding. A polycarbonate orthodontic bracket was then bonded with Sevriton resin and each tooth was stored for one week in water. After storage, the brackets were then removed and residual resin was cleaned off with a dental scaler. Half of the teeth were pumiced with flour of pumice for ten seconds. The teeth were observed microscopically to determine the condition of the labial surface. A 2% solution of sodium fluoride was applied to the teeth for eight minutes and the samples were then individually stored in water for one week. An enamel biopsy was performed and analyzed for fluoride, calcium, and phosphorus. A great deal of fluoride was taken up by the enamel surface on all the specimens. It was found that pumicing the teeth prior to the application of topical fluoride results in a significantly greater uptake of fluoride by the enamel surface. The results of this investigation indicate that a pumice wash following bracket removal facilitates a greater and more uniform uptake of topically applied fluoride on the surface of the teeth.Item Analysis of orthodontic treatment by pediatric dentists and general practitioners in Indiana(1986) Koroluk, Lorne D.; Avery, David R.; Hennon, David Kent, 1933-; Jones, James E. (James Earl), 1950-; Barton, Paul; Kasle, Myron J.Orthodontic treatment being provided by pediatric dentists and general practitioners in Indiana was investigated. A two page questionnaire constructed by the investigator was used to gather the data. The study sample consisted of 571 dentists. All 71 Indiana pediatric dentists primarily in private practice were surveyed. General practitioners (500) were chosen on the basis of age, year of graduation from dental school, geographic location and size of community in which they practiced. Seventy-eight percent of the questionnaires were returned; of this total, 93 percent of the pediatric dentists and 77 percent of the general practitioners responded. The study showed that currently in Indiana 62 percent of the pediatric dentists and 17.9 percent of the general practitioners surveyed provided comprehensive orthodontic treatment. These results are much higher than results of previous surveys of pediatric dentists and general practitioners. The study also found that pediatric dentists provide significantly more comprehensive orthodontic treatment and spend significantly more time providing orthodontic treatment than do general practitioners. Age of practitioner was found not to significantly affect the percentage of time spent providing orthodontic treatment, the orthodontic conditions treated or the type of appliances and techniques used. Population of the community in which the practice was located did have a significant effect. Practitioners in communities of over 100,000 provided significantly less comprehensive orthodontic treatment. Practitioners who practiced in communities of 5,000-25,000 spent significantly more time providing orthodontic services. Sixty-three percent of the practitioners surveyed had taken some type of continuing education course in orthodontics. An overwhelming majority of practitioners (over 90 percent) stated that their undergraduate orthodontic training in dental school inadequately prepared them for private practice. The majority of pediatric dentists (78 percent) also stated that their postgraduate education instruction in orthodontics was inadequate.Item Apert Syndrome : A Descriptive Analysis of Selected Computed Tomographic Images of the Craniofacial Complex(1988) Schafer, Alan Boulware; Garner, LaForrest D.; Bixler, David; Hennon, David K.; Kasle, Myron J.; Miller, James R.; Shanks, James C.The purpose of this study was to demonstrate how selected computed tomographic images of the craniofacial complex may be used in a descriptive evaluation of cranial dysmorphology in living subjects with Apert syndrome. Computed tomographic images using coronal sections through the optic disc, planum sphenoidale, and axial sections through petrous ridges, pterygopalatine fossa, and midorbital level from two Apert syndrome and two non-syndrome controls were evaluated. Reference lines were established using actual and constructed landmarks. The results were tabulated for all four subjects. The two Apert subjects (in contrast to the non-syndrome subjects) demonstrated the following: a) orbital proptosis with a reduced bony orbital depth and elongation of the orbits in a superior direction with an altered vertical orbital axis b) increased lateral orbital wall angle c) alteration of the anterior cranial base with depression of the ethmoid complex d) midface regression Interestingly, ocular hypertelorism, which has been reported to be a feature of Apert syndrome, could not be confirmed by use of these CT scans. The findings obtained from this study are consistent with the published characteristics of Apert syndrome. In conclusion, this study demonstrates the utility of computed tomographic images in the evaluation of craniofacial dysmorphology.Item Facilitating the Location of Porion to Compare True Frankfort Horizontal with Sella-Nasion(1979) Gormley, Douglas A.; Garner, LaForrest D.; Shanks, James C.; Kasle, Myron J.; Dirlam, James H.The constructed cephalometric line sella-nasion minus seven degrees (SN-7°) has long been used as a substitute for the Frankfort horizontal in the descriptive analysis of orthodontic cases, due to the difficulty in locating anatomic porion. To eliminate this problem, the cephalostat was modified by replacing the original ear rods with hollow, cylindrically shaped shafts which permit the consistent visualization of anatomic porion. Location accuracy was tested by the double determination method. Then, using anatomic porion, the hypothesis that the constructed line SN-7° is an accurate and reliable substitute for Frankfort horizontal in the descriptive analysis of cases was tested. In an adult sample, the mean Frankfort horizontal - sella-nasion angle was 9.03° (S.D.=2.58) with a range of 2.0° to 17.5°. It was concluded that neither SN-7° nor any other constructed line is a reliable substitute for the Frankfort horizontal, due to the wide range of values determined. The mean Frankfort horizontal - mandibular plane angle was determined to test the hypothesis that when anatomic porion is utilized to construct the Frankfort horizontal, this angle is significantly different from that measured in other similar samples. The mean angle was 19.50° (S.D.=5.74) with a range of 8.0° to 35.5°. This value was significantly less than those determined for the Frankfort horizontal – mandibular plane angle in previous research.Item Formocresol pulpotomy in teeth of dogs with induced pulpal and periapical pathoses(1971) Kennedy, David B., 1946-; Mitchell, David; Garner, La Forrest Dean, 1933-; Kasle, Myron J.; Mercer, Victor H., 1928-Formocresol pulpotomy has been recommended for all infected primary molars irrespective of pulp vitality. Microscopic evidence is lacking when teeth with less than optimal pulpal preoperative conditions are treated. This study evaluated clinically, radiographically, and microscopically the effect of the five-minute formocresol pulpotomy in primary and permanent teeth of dogs with induced pulpal and periapical pathoses. Radicular pulps of 18 permanent and 12 primary teeth were exposed to the oral flora for 28 and 14 days, respectively, to produce pathoses that would contraindicate routine use of the pulpotomy. The five-minute formocresol pulpotomy was performed and nine permanent teeth were evaluated after four weeks and another nine after 12 weeks; the primary teeth were evaluated after 14 days. Eight permanent and four primary "control” teeth had their radicular pulps exposed to the oral flora for identical periods but were not treated by formocresol. In permanent teeth clinical success was 90 per cent, radiographic success was 30 per cent, and microscopic success of bloc sections was 10 per cent. The vital pulp reacted to formocresol by forming a homogenous band of markedly eosinophilic tissue, interpreted as "fixation;" very pale staining tissue was apical to this. A second area of marked eosinophilic tissue was in the apical part of all vital canals, apical to which was vital normal pulp. Similar trends were seen in the primary teeth. No "fixation," organization or repair was seen within any periapical lesion. The microscopic periapical appearance of related vital permanent and all necrotic canals indicated that formocresol pulpotomy is not particularly effective in teeth with induced pulpal and periapical pathoses. The findings suggest that it be used only under optimal clinical conditions.Item Predicting the mesial-distal dimensions of teeth with panoramic radiography(1972) Schneider, Paul E.; Starkey, Paul; Englander, William; Kasle, Myron J.; Standish, S. Miles, 1923-2003The purpose of this study was to determine the relative accuracy of a panoramic radiographic method in the determination of unerupted tooth mass. Four types of radiographic films were made for each of fifty children. The diameters of the unerupted permanent cuspids and bicuspids were measured to compare and assess the degree of linear distortion between the types of radiographs when obtained under routine clinical conditions. The experimental Panorex film was made with the patient positioned eccentrically, but all other radiographic procedures used in this study followed the techniques recommended by the Indiana University School of Dentistry Department of Radiology. The greatest mesial-distal dimensions of the unerupted permanent cuspids and bicuspids were recorded to the nearest 0.1 millimeter. The data were recorded on standard IBM punch cards and submitted for summation and statistical analysis to the Research Computation Center of Indiana University- Purdue University at Indianapolis. Although magnification was reduced considerably, the experimental technique was demonstrated not to be of sufficient and consistent accuracy to be applicable in the determination of tooth mass for the mixed dentition analysis.