Home Subscription Services

The International Journal of Prosthodontics
IJP Home Page
About the Editor
Editorial Board
Accepted Manuscripts
Author Guidelines
Submission Form
Reprints / Articles
Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

January/February 2007
Volume 20 , Issue 1

Share Abstract:

Effect of Jaw Position on Forced Maximum Inspiratory Airflow in Normal Japanese Subjects and in Japanese Patients with Sleep Apnea Syndrome

Hiroko Tsuda, DDS / Tohru Tsuda, MD, PhD / Shin-ichi Masumi, DDS, PhD

Pages: 2530
PMID: 17319358

Purpose: The purpose of this study was to evaluate whether maximum forced inspiratory airflow changes occur by changing the jaw position in Japanese normal subjects and patients with obstructive sleep apnea (OSA) classified by their craniofacial features. Materials and Methods: The subjects included 8 male non-OSA subjects and 15 male patients with OSA whose conditions had been diagnosed with a polysomnographic recording. The OSA subjects were divided into 2 groups by means of a craniofacial (CF) score based on cephalometric variables: a high-score group (CF score ≥ 4) and a low-score group (CF score 3). A case-control design was utilized to assess group differences (control and 2 patient groups). Airflow changes were determined using a spirometer that assessed the velocity of airflow during forced inspiration. Maximum forced inspiratory airflow was measured in 4 positions in all patients. Results: All 3 groups had a significant decrease in their maximum forced inspiratory airflow upon reclining, and there were no significant group differences regarding the magnitude of this change. The OSA subjects returned to baseline measurements more than controls when the jaw was positioned forward, as the jaw was progressively advanced in high CF score subjects. Conclusion: This study suggested that a protrusive jaw position allows more inspiratory airflow to occur in OSA patients compared to controls, and this was significant in the patients with a high CF score. Int J Prosthodont 2007;20:2530.

Full Text PDF File | Order Article


Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.
  © 2015 Quintessence Publishing Co Inc

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog