Document Detail

Changes in occlusal contact area during oral appliance therapy assessed on study models.
MedLine Citation:
PMID:  18298224     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To test the hypothesis that long-term use of an oral appliance (OA) does not cause changes in the occlusal contact area (OCA). MATERIALS AND METHODS: Baseline and follow-up treatment study models were obtained for 45 patients with obstructive sleep apnea who had been using an OA for 4 or more days/week for more than 5 years. Study models in centric occlusion, with an inserted pressure-sensitive sheet, were loaded in compression. An image scanner was used to evaluate OCA. RESULTS: A significant change in total OCA was identified in 39 patients (86.7%): a decrease in 26 (66.7%) and an increase in 13 (33.3%) patients. Regional changes >5% were observed in >90% of patients in each of the three regions. In the molar and premolar regions, 24 (53.3%) and 27 (60.0%) of the patients showed an OCA decrease, while only 16 (35.6%) and 15 (33.3%) showed an increase. Conversely, for the anterior region, more increases (24 patients-53.3%) than decreases were identified. CONCLUSION: The hypothesis is rejected. Long-term OA therapy resulted in dramatic changes of occlusion, suggesting that monitoring of occlusal changes is required.
Hiroshi Ueda; Fernanda R Almeida; Alan A Lowe; N Dorin Ruse
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Angle orthodontist     Volume:  78     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-02-26     Completed Date:  2008-11-18     Revised Date:  2010-06-08    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  866-72     Citation Subset:  D; IM    
Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate school of Biomedical Sciences, Hiroshima, Japan.
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MeSH Terms
Bicuspid / pathology
Coloring Agents / diagnostic use
Cuspid / pathology
Dental Models*
Dental Occlusion*
Dental Occlusion, Centric
Follow-Up Studies
Image Processing, Computer-Assisted / methods
Incisor / pathology
Jaw Relation Record / instrumentation
Mandibular Advancement / instrumentation
Middle Aged
Molar / pathology
Orthodontic Appliance Design
Orthodontic Appliances*
Polyethylene Terephthalates / diagnostic use
Sleep Apnea, Obstructive / therapy*
Snoring / therapy
Surface Properties
Reg. No./Substance:
0/Coloring Agents; 0/Polyethylene Terephthalates

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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