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Force transfer and stress distribution in an implant-supported overdenture retained with a hader bar attachment: a finite element analysis.

Identifieur interne : 000A08 ( PubMed/Corpus ); précédent : 000A07; suivant : 000A09

Force transfer and stress distribution in an implant-supported overdenture retained with a hader bar attachment: a finite element analysis.

Auteurs : Preeti Satheesh Kumar ; Kumar K S. Satheesh ; Jins John ; Geetha Patil ; Ruchi Patel

Source :

ISRN dentistry [ 2090-4371 ] ; 2013.

RBID : pubmed:24459589

Abstract

Background and Objectives. A key factor for the long-term function of a dental implant is the manner in which stresses are transferred to the surrounding bone. The effect of adding a stiffener to the tissue side of the Hader bar helps to reduce the transmission of the stresses to the alveolar bone. But the ideal thickness of the stiffener to be attached to the bar is a subject of much debate. This study aims to analyze the force transfer and stress distribution of an implant-supported overdenture with a Hader bar attachment. The stiffener of the bar attachments was varied and the stress distribution to the bone around the implant was studied. Methods. A CT scan of edentulous mandible was used and three models with 1, 2, and 3 mm thick stiffeners were created and subjected to loads of emulating the masticatory forces. These different models were analyzed by the Finite Element Software (Ansys, Version 8.0) using von Mises stress analysis. Results. The results showed that the maximum stress concentration was seen in the neck of the implant for models A and B. In model C the maximum stress concentration was in the bar attachment making it the model with the best stress distribution, as far as implant failures are concerned. Conclusion. The implant with Hader bar attachment with a 3 mm stiffener is the best in terms of stress distribution, where the stress is concentrated at the bar and stiffener regions.

DOI: 10.1155/2013/369147
PubMed: 24459589

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pubmed:24459589

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<author><name sortKey="Satheesh Kumar, Preeti" sort="Satheesh Kumar, Preeti" uniqKey="Satheesh Kumar P" first="Preeti" last="Satheesh Kumar">Preeti Satheesh Kumar</name>
<affiliation><nlm:affiliation>Department of Prosthodontics, The Oxford Dental College & Research Hospital, Bommanhalli, Hosur Road, Bangalore 68, India.</nlm:affiliation>
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<author><name sortKey="Satheesh, Kumar K S" sort="Satheesh, Kumar K S" uniqKey="Satheesh K" first="Kumar K S" last="Satheesh">Kumar K S. Satheesh</name>
<affiliation><nlm:affiliation>Department of Prosthodontics, The Oxford Dental College & Research Hospital, Bommanhalli, Hosur Road, Bangalore 68, India.</nlm:affiliation>
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<author><name sortKey="John, Jins" sort="John, Jins" uniqKey="John J" first="Jins" last="John">Jins John</name>
<affiliation><nlm:affiliation>Department of Prosthodontics, The Oxford Dental College & Research Hospital, Bommanhalli, Hosur Road, Bangalore 68, India.</nlm:affiliation>
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<author><name sortKey="Patil, Geetha" sort="Patil, Geetha" uniqKey="Patil G" first="Geetha" last="Patil">Geetha Patil</name>
<affiliation><nlm:affiliation>Department of Prosthodontics, Rajiv Gandhi College of Dental Sciences, Bangalore, India.</nlm:affiliation>
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<author><name sortKey="Patel, Ruchi" sort="Patel, Ruchi" uniqKey="Patel R" first="Ruchi" last="Patel">Ruchi Patel</name>
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<author><name sortKey="John, Jins" sort="John, Jins" uniqKey="John J" first="Jins" last="John">Jins John</name>
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<author><name sortKey="Patil, Geetha" sort="Patil, Geetha" uniqKey="Patil G" first="Geetha" last="Patil">Geetha Patil</name>
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<author><name sortKey="Patel, Ruchi" sort="Patel, Ruchi" uniqKey="Patel R" first="Ruchi" last="Patel">Ruchi Patel</name>
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<front><div type="abstract" xml:lang="en">Background and Objectives. A key factor for the long-term function of a dental implant is the manner in which stresses are transferred to the surrounding bone. The effect of adding a stiffener to the tissue side of the Hader bar helps to reduce the transmission of the stresses to the alveolar bone. But the ideal thickness of the stiffener to be attached to the bar is a subject of much debate. This study aims to analyze the force transfer and stress distribution of an implant-supported overdenture with a Hader bar attachment. The stiffener of the bar attachments was varied and the stress distribution to the bone around the implant was studied. Methods. A CT scan of edentulous mandible was used and three models with 1, 2, and 3 mm thick stiffeners were created and subjected to loads of emulating the masticatory forces. These different models were analyzed by the Finite Element Software (Ansys, Version 8.0) using von Mises stress analysis. Results. The results showed that the maximum stress concentration was seen in the neck of the implant for models A and B. In model C the maximum stress concentration was in the bar attachment making it the model with the best stress distribution, as far as implant failures are concerned. Conclusion. The implant with Hader bar attachment with a 3 mm stiffener is the best in terms of stress distribution, where the stress is concentrated at the bar and stiffener regions.</div>
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<Abstract><AbstractText>Background and Objectives. A key factor for the long-term function of a dental implant is the manner in which stresses are transferred to the surrounding bone. The effect of adding a stiffener to the tissue side of the Hader bar helps to reduce the transmission of the stresses to the alveolar bone. But the ideal thickness of the stiffener to be attached to the bar is a subject of much debate. This study aims to analyze the force transfer and stress distribution of an implant-supported overdenture with a Hader bar attachment. The stiffener of the bar attachments was varied and the stress distribution to the bone around the implant was studied. Methods. A CT scan of edentulous mandible was used and three models with 1, 2, and 3 mm thick stiffeners were created and subjected to loads of emulating the masticatory forces. These different models were analyzed by the Finite Element Software (Ansys, Version 8.0) using von Mises stress analysis. Results. The results showed that the maximum stress concentration was seen in the neck of the implant for models A and B. In model C the maximum stress concentration was in the bar attachment making it the model with the best stress distribution, as far as implant failures are concerned. Conclusion. The implant with Hader bar attachment with a 3 mm stiffener is the best in terms of stress distribution, where the stress is concentrated at the bar and stiffener regions.</AbstractText>
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<AffiliationInfo><Affiliation>Department of Prosthodontics, The Oxford Dental College & Research Hospital, Bommanhalli, Hosur Road, Bangalore 68, India.</Affiliation>
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Force transfer and stress distribution in an implant-supported overdenture retained with a hader bar attachment: a finite element analysis.

Force transfer and stress distribution in an implant-supported overdenture retained with a hader bar attachment: a finite element analysis.

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