| Preload loss and bacterial penetration on different implant-abutment connection systems. | |
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MedLine Citation:
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PMID: 20640358 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Preload loss can favor the occurrence of implant-abutment interface misfit, and bacterial colonization at this interface may lead to implant failure. The aim of this study was to evaluate the preload loss and bacterial penetration through the implant-abutment interface of conical and external hexagon connection systems subjected to thermal cycling and mechanical fatigue (TM). Four different implant-abutment connection systems were evaluated (n=6): external hexagon with universal post, Morse taper with universal post, Morse taper with universal post through bolt, and locking taper with standard abutment. The assemblies (implant-abutment) were subjected to a thermal cycling regimen (1,000 cycles of 5 degrees C and 55 degrees C) and to mechanical fatigue (1.0 million cycles, 1.0 Hz, 120 N). The assemblies were immersed in Tryptic Soy + Yeast Extract broth containing Streptococcus sanguinis and incubated at 37 degrees C and 10% CO(2) for 72 h. Detorque values were recorded. The bacterial penetration was assessed and the abutments were observed by scanning electron microscopy. The preload data were analyzed statistically by two-way ANOVA and Tukey's test at 5% significance level. All screw abutment systems showed significantly higher (p<0.05) detorque values when subjected to TM and all conical systems presented bacterial penetration. The results show no relationship between the preload loss and the bacterial penetration. |
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Authors:
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Antônio Pedro Ricomini Filho; Frederico Silva de Freitas Fernandes; Fabiana Gouveia Straioto; Wander José da Silva; Altair Antoninha Del Bel Cury |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Brazilian dental journal Volume: 21 ISSN: 1806-4760 ISO Abbreviation: Braz Dent J Publication Date: 2010 |
Date Detail:
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Created Date: 2010-07-19 Completed Date: 2010-11-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9214652 Medline TA: Braz Dent J Country: Brazil |
Other Details:
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Languages: eng Pagination: 123-9 Citation Subset: D |
Affiliation:
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Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Dental Abutments / microbiology* Dental Implantation, Endosseous / instrumentation Dental Implants / classification, microbiology* Dental Prosthesis Design* Dental Prosthesis, Implant-Supported Dental Restoration Failure* Dental Stress Analysis Denture Precision Attachment / microbiology Equipment Contamination / prevention & control* Random Allocation Single-Blind Method Statistics, Nonparametric |
| 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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