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Article: Mathematical analysis of occlusal rest design for cast removable partial dentures.

TitleMathematical analysis of occlusal rest design for cast removable partial dentures.
Authors
Issue Date2007
PublisherF D I World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.html
Citation
The European Journal Of Prosthodontics And Restorative Dentistry, 2007, v. 15 n. 1, p. 29-32 How to Cite?
AbstractAIMS: To establish the minimum dimensions for a non-precious cast metal occlusal rest by using mathematical analysis. An occlusal rest in a removable partial denture (RPD) provides vertical support and allows occlusal forces to be transmitted through the long axis of the abutment tooth. METHODS: The stress status of an occlusal rest in a posterior tooth-bounded RPD resembles that of a cantilever beam under a uniformly distributed load. A mathematical model based on a short rectangular cantilever beam was derived by using the yield strengths of a cast cobalt-chromium alloy and a cast titanium alloy (Ti-6Al-4V), with an applied static occlusal force of 400 N. RESULTS: For the cobalt-chromium alloy, the minimum rectangular dimensions for a 2.0 mm long occlusal rest are; when the width is 2.0 mm, the depth or thickness should be at least 1.03 mm. For the titanium alloy, the minimum dimensions are; when the width is 2.0 mm, the depth or thickness should be at least 0.85 mm. A decrease in the occlusal width will increase the bending stress, requiring a thicker rest for compensation, which may lead to dentin exposure during the rest seat preparation. CONCLUSION: The mathematical analysis found that the traditional spoon-shaped occlusal rest seat dimensions comply with the mechanical requirements for non-precious cast metal occlusal rests in RPDs.
Persistent Identifierhttp://hdl.handle.net/10722/67238
ISSN
2015 SCImago Journal Rankings: 0.230

 

DC FieldValueLanguage
dc.contributor.authorLuk, NKen_HK
dc.contributor.authorWu, VHen_HK
dc.contributor.authorLiang, BMen_HK
dc.contributor.authorChen, YMen_HK
dc.contributor.authorYip, KHen_HK
dc.contributor.authorSmales, RJen_HK
dc.date.accessioned2010-09-06T05:53:08Z-
dc.date.available2010-09-06T05:53:08Z-
dc.date.issued2007en_HK
dc.identifier.citationThe European Journal Of Prosthodontics And Restorative Dentistry, 2007, v. 15 n. 1, p. 29-32en_HK
dc.identifier.issn0965-7452en_HK
dc.identifier.urihttp://hdl.handle.net/10722/67238-
dc.description.abstractAIMS: To establish the minimum dimensions for a non-precious cast metal occlusal rest by using mathematical analysis. An occlusal rest in a removable partial denture (RPD) provides vertical support and allows occlusal forces to be transmitted through the long axis of the abutment tooth. METHODS: The stress status of an occlusal rest in a posterior tooth-bounded RPD resembles that of a cantilever beam under a uniformly distributed load. A mathematical model based on a short rectangular cantilever beam was derived by using the yield strengths of a cast cobalt-chromium alloy and a cast titanium alloy (Ti-6Al-4V), with an applied static occlusal force of 400 N. RESULTS: For the cobalt-chromium alloy, the minimum rectangular dimensions for a 2.0 mm long occlusal rest are; when the width is 2.0 mm, the depth or thickness should be at least 1.03 mm. For the titanium alloy, the minimum dimensions are; when the width is 2.0 mm, the depth or thickness should be at least 0.85 mm. A decrease in the occlusal width will increase the bending stress, requiring a thicker rest for compensation, which may lead to dentin exposure during the rest seat preparation. CONCLUSION: The mathematical analysis found that the traditional spoon-shaped occlusal rest seat dimensions comply with the mechanical requirements for non-precious cast metal occlusal rests in RPDs.en_HK
dc.languageengen_HK
dc.publisherF D I World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.htmlen_HK
dc.relation.ispartofThe European journal of prosthodontics and restorative dentistryen_HK
dc.titleMathematical analysis of occlusal rest design for cast removable partial dentures.en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0965-7452&volume=15&spage=29&epage=32&date=2007&atitle=Mathematical+analysis+of+occlusal+rest+design+for+cast+removable+partial+dentures+en_HK
dc.identifier.emailYip, KH: kevin.h.k.yip@hkusua.hku.hken_HK
dc.identifier.authorityYip, KH=rp00027en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid17378456-
dc.identifier.scopuseid_2-s2.0-34547646685en_HK
dc.identifier.hkuros137032en_HK
dc.identifier.volume15en_HK
dc.identifier.issue1en_HK
dc.identifier.spage29en_HK
dc.identifier.epage32en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLuk, NK=18234032800en_HK
dc.identifier.scopusauthoridWu, VH=18234342800en_HK
dc.identifier.scopusauthoridLiang, BM=18234259100en_HK
dc.identifier.scopusauthoridChen, YM=7601450466en_HK
dc.identifier.scopusauthoridYip, KH=25423244900en_HK
dc.identifier.scopusauthoridSmales, RJ=7005372382en_HK

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