Document Detail

On the selection and preparation of a wire for the labial bow of an orthodontic retainer.
MedLine Citation:
PMID:  7978524     Owner:  NLM     Status:  MEDLINE    
The Hawley retainer is often prescribed by the practitioner for part-time wear during the retentive period subsequent to a program of active, maxillary arch, orthodontic therapy. The labial bow of this retainer, while engaged, may be subjected to contact forces from sources other than the maxillary anterior teeth. The bow also experiences small deformations during placement and removal of the appliance from the oral cavity. Potential failures of the bow are: 1) inelastic bending from individual masticatory actions that change its as-prepared shape; and 2) fracture due to fatigue arising from many cycles of removing and replacing the retainer. Reported in this paper, a sequel to a previous article, are the outcomes of two experiments and a nonparametric analysis that led to the development of a set of recommendations pertaining to the selection of the wire and preparation of the labial bow. Controlled variables in this study were as-received size, alloy and temper of the wire, and heat-treatment following fabrications of bow-specimens.
J M Stein; R J Nikolai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Angle orthodontist     Volume:  64     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  1994  
Date Detail:
Created Date:  1994-12-01     Completed Date:  1994-12-01     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  291-7     Citation Subset:  D; IM    
Graduate Department of Orthodontics, Saint Louis University Health Sciences Center, MO 63104-1085.
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MeSH Terms
Chromium Alloys / chemistry
Equipment Failure
Gold Alloys / chemistry
Materials Testing
Orthodontic Appliance Design*
Orthodontic Appliances, Removable*
Orthodontic Wires*
Stainless Steel / chemistry
Stress, Mechanical
Surface Properties
Tooth Movement / instrumentation
Reg. No./Substance:
0/Chromium Alloys; 0/Gold Alloys; 12597-68-1/Stainless Steel

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

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