| Analysis of the occlusal stress transmitted to the inferior alveolar nerve by an osseointegrated threaded fixture. | |
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MedLine Citation:
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PMID: 18771376 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Altered sensation can occur after the placement or loading of mandibular implants. Limited evidence exists with regard to the proper distance between the implant and the mandibular nerve to ensure the nerve's integrity and physiologic activity. The proper distance should come from evaluation of clinical data as well as from biomechanical analyses. METHODS: A numeric mandibular model based on the boundary element method was created to simulate a mandibular segment containing a threaded fixture so that the pressure on the trigeminal nerve, as induced by the occlusal loads, could be assessed. Such pressure distributions were evaluated with different distances of the fixture from the mandibular canal and considering different bone densities. Although all simulations considered a canal that was orthogonal to the implant axis, in one case, the effects of an inclined canal were analyzed. RESULTS: The nerve pressure increased rapidly with a bone density decrease. A low mandibular cortical bone density caused a major nerve pressure increase. CONCLUSION: Our study suggested a distance of 1.5 mm to prevent implant damage to the underlying inferior alveolar nerve when biomechanical loading was taken into consideration. |
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Authors:
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G Sammartino; G Marenzi; R Citarella; R Ciccarelli; H-L Wang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of periodontology Volume: 79 ISSN: 0022-3492 ISO Abbreviation: J. Periodontol. Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-09-05 Completed Date: 2008-11-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8000345 Medline TA: J Periodontol Country: United States |
Other Details:
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Languages: eng Pagination: 1735-44 Citation Subset: D; IM |
Affiliation:
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Section of Oral Surgery, Department of Odontostomatological and Maxillofacial Sciences, University of Naples Federico II, Via Pansini 5, Naples, Italy. gilberto.sammartino@unina.it |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Biomechanics Bite Force* Bone Density / physiology Computer Simulation Dental Implants* Dental Prosthesis Design* Humans Mandible / innervation Mandibular Nerve / physiology* Middle Aged Models, Biological Nonlinear Dynamics Osseointegration / physiology* Pressure Stress, Mechanical Surface Properties Trigeminal Nerve / physiology |
| Chemical | |
Reg. No./Substance:
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0/Dental Implants |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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