HOMEPRODUCTSSERVICESCOMPANYCONTACTFAQResearchDictionaryPharmaMobileSign Up FREE or Login

The effect of rapid maxillary expansion on nasal airway resistance.

Abstract
There has been a long-standing controversy over the efficacy of rapid maxillary expansion to relieve nasal obstruction and improve respiration. Recently rhinomanometry has provided a discipline for the investigation into nasal airway physiology with quantifiable parameters for evaluation and comparable studies. In this trial, a sample of 26 patients (13 male and 13 female, age range 10.10 to 19.6 years), receiving rapid maxillary expansion as part of their orthodontic mechano-therapy, were appraised for nasal airway resistance before and after expansion. The posterior rhinomanometric technique was used, measuring the respiratory flow between pharynx and the nostrils at a preset pressure difference between these two points. The formula for calculating the resistance is derived from the electrical Ohm's Law and requires that the pressure difference be divided by the flow. Reductions were recorded in all cases with an average of 36.2 per cent (range 11.6-58.6). The correlation between the resistance reductions and the delivered expansions (increases in trans-palatal widths) was weak (r = 0.32). In view of the probable significance of the liminal valve in nasal resistance, expansions in this area were assessed by changes in the trans-alar widths. The correlation between trans-alar increases and the trans-palatal expansions was weak (r = 0.115), as it was between the trans-alar increases and the reductions in nasal airway resistance (r = 0.30).
AuthorsD J Timms
JournalBritish journal of orthodontics (Br J Orthod) Vol. 13 Issue 4 Pg. 221-8 (Oct 1986) ISSN: 0301-228X [Print] ENGLAND
PMID3535873 (Publication Type: Journal Article)
Topics
  • Adolescent
  • Adult
  • Airway Resistance
  • Child
  • Female
  • Humans
  • Male
  • Manometry
  • Maxilla (physiology)
  • Nose (physiology)
  • Palatal Expansion Technique
  • Pressure
  • Time Factors

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research network!


Choose Username:
Email:
Password:
Verify Password: