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Jeffrey J Blasius

Publications and source records attributed to Jeffrey J Blasius.

3 recordsLinked to original sources

Work-pattern differences between male and female orthodontists.

INTRODUCTION: Traditionally, most orthodontists have been men. In recent years, however, the number of women in dentistry and dental specialties, including orthodontics, has increased dramatically. Because practice patterns of male and female orthodontists might differ, they should be evaluated so that our schools can produce enough providers for the future. METHODS: Questionnaires were mailed to 798 orthodontists; the response rate was 68.8%. Questions about practice behavior and productivity were designed to assess sex difference with respect to age, marital status, and number of children. RESULTS: Number of children appeared to be a good predictor of days worked per week and length of leaves of absence for female orthodontists. Solo practitioners dominate the field of orthodontics, irrespective of age or sex. Although women were less likely than men to be practice owners, only 20% of the women responding were not in an ownership position. Women were slightly more likely to be involved in a group practice, they worked in fewer offices than men, and they employed fewer full-time and part-time people. Female nonowners were more likely to take longer leaves of absence. Overall, women worked slightly fewer days per week and spent fewer hours per week in direct patient care. Annually, they devoted 25 fewer days to practice than men, but, when adjusted for leaves of absence, men and women worked similar numbers of weeks in 1999. CONCLUSIONS: Among orthodontists, work patterns of men and women differ somewhat, but these differences might not be as significant as other factors; more study is required.

Adult↗

Heterogeneity in vertical positioning of the hyoid bone in relation to genioglossal activity in men.

The aim of this study was to investigate whether there is any relationship among genioglossus (GG) baseline electromyographic (EMG) activity, upper airway resistance, and sex. We hypothesized that GG baseline EMG activity and its response to pharyngeal partial occlusion may be heterogeneous in men but homogeneous in women. Lateral head roentgenograms were obtained in the upright standing position with the head at natural posture from age-matched, healthy, 16 men and 15 women. A miniature balloon was placed in the retroglossal pharynx, and a record of GG EMG response was measured. The database was divided by sex and further categorized based on the increment of GG EMG response to inflation of the balloon. Both sexes included responsive subjects showing a greater GG EMG activity increase than the mean values and a counterpart, ie, a nonresponsive group. When the two subgroups were compared, the hyoid bone of the responsive subjects positioned more inferiorly than that of nonresponsive subjects in men (P < .05). When men and women were compared, most cephalometric measurements were significantly larger in the male responders, but no difference was shown in the nonresponders. We concluded that men with a lower hyoid bone show greater GG reflexive response to the partial oropharyngeal obstruction.

Adult↗

Sex differences in genioglossus muscle response to changes in pharyngeal resistance.

The genioglossus (GG) muscle's response to partial oropharyngeal occlusion was studied in age-matched, healthy awake men (n = 16) and women (n = 15). A miniature balloon was placed in the retroglossal pharynx, and the GG's electromyographic (EMG) reflexive response was evaluated in different body postures. We assumed that inflating the pharyngeal balloon and changing the body posture from upright to supine would increase pharyngeal airway resistance. Our hypothesis was that the change in airway resistance would elicit a different response in the GG muscle depending on sex. Our results showed that GG activity during natural breathing was higher in women than in men. GG EMG activity did not change upon inflation of the balloon in women. In contrast, when the balloon was inflated in the men, the GG's basal activity increased (P <.01) in both the upright and the supine positions. Women appeared to show a higher GG baseline EMG activity during spontaneous breathing at rest, while men were more responsive to the partial occlusion of the pharyngeal airway.

Adult↗