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Biomedical subjects

R Potter

Publications and source records attributed to R Potter.

60 records · Page 4Linked to original sources
PubMedDate not supplied

Tooth movements associated with deep overbite correction in Class II division 1 malocclusions.

The orthodontic profession has assumed much of the responsibility for the improvement in function of the teeth and jaws. Since function is closely associated with overbite, the correction of vertical overbite discrepancies comprises a major part of clinical orthodontics. This investigation was undertaken to describe the movements that teeth undergo during the correction of excessive overbites and to correlate these movements to the change in overbite. A total of 87 cases were selected from the records of the Indiana University School of Dentistry, Department of Orthodontics. The selected cases had an excessive pre-treatment overbite of 4.0 mm or more as seen cephalometrically and a satisfactory post-treatment result. In addition, they were clinically determined to be post-pubertal, indicating essentially no growth potential during the treatment period. Pre and post-treatment tracings of the cephalograms were made and measurements collected from the tracings. Superimpositions were prepared of the pre and post-treatment radiographs and the general trends that appeared were noted. The change in overbite was correlated to tooth movements of the Class II Division 1 correction using the Pearson test of correlation coefficients. The results indicate that the tooth movements most commonly seen in treatment to reduce excessive overbite occur mainly in the mandibular arch. In Class II Division 1 cases, the change was significantly correlated to the reduction in vertical height of the mandibular incisor and to the increase in the angulation of the mandibular incisor to the mandibular plane. Not all measurements recorded were significantly correlated to the change in overbite.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMedDate not supplied

Nitrous oxide: a survey of Indiana dental offices.

This investigation surveyed Indiana dental practices to determine the current use of nitrous oxide; administration procedures, ventilation techniques, and potential health hazards associated with exposure to nitrous oxide waste gases. A 26-item questionnaire was sent to 2,256 dental offices in Indiana. Questions were asked regarding office demographics, use of nitrous oxide administration and inspection procedures, symptoms of N2O exposure, and interest in further administration and safety information. The data were evaluated using a computer program for frequency counts and percentages. The results of this survey provide a profile of nitrous oxide utilization in Indiana.

Anesthesia, Dental↗
PubMedDate not supplied

Dental attitudes and memories: a study of the effects of hand over mouth/restraint.

The purpose of this study was to document whether there was a significant difference in the number and severity of generalized fears and dental fears between patients who did and patients who did not experience hand-over-mouth and/or restraint as children. Patient records in a dental school children's clinic and a private pediatric dental practice were examined to identify patients who had experienced hand-over-mouth and/or restraint. A set of verbal questions was designed, tested, and used to ascertain the differences between the HOM/restraint group and the comparison group. One hundred twenty-two subjects were interviewed, 61 who had experienced HOM/restraint and 61 who had not. When compared for generalized fears and specific dental fears, the two groups showed no statistically significant differences (P = 0.86 and P = 0.36 respectively). No statistically significant difference appeared between the two groups when asked how they felt about visiting the dental office (P = 0.41). When three different formats were used to question the subjects relative to their early dental memories, the two groups showed no statistical difference in negative or positive responses (P = 0.38, 0.75, and 0.25 respectively). More than two times as many HOM/restraint subjects as comparison subjects described negative experiences in a physician's office or hospital. This difference was statistically significant (P < 0.01).

Adolescent↗