| The effect of oscillation and low seating forces on pulpward pressure transmission and seating during crown cementation: a laboratory study. | |
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MedLine Citation:
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PMID: 11842906 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: This study investigated the effects of low seating force (5 N) with and without oscillation on pulpward pressure transmission during crown cementation. MATERIALS AND METHODS: Thirty human premolars received standardized complete-crown preparations. They were randomly allocated into three experimental groups of ten: group 1 = 100-N static load; group 2 = 5-N static load; and group 3 = 5-N load with oscillation. Crowns were constructed of base-metal alloy and attached to a purpose-built loading device. Pulpal pressures were recorded using a 0- to 104-kPa pressure transducer that was connected via the sectioned root of the premolar to the pulp chamber, which was perfused with saline driven by nitrogen gas at 83 kPa until a steady rate was achieved. The crowns were cemented using zinc phosphate cement, and postcementation elevations were measured with a linear variable differential transformer. An amalgam condenser provided oscillation for 1 minute. RESULTS: The pulpal pressures were: group 1 = 455 Pa; group 2 = 26 Pa; and group 3 = 76 Pa. The postcementation crown elevations were: group 1 = -48 microm; group 2 = 362 microm; and group 3 = 26 microm. CONCLUSION: Acceptable crown seating can be obtained using low force (5 N) combined with oscillation, and lower pressure pulses are generated compared to using high force (100 N) alone. |
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Authors:
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A J Humplik; P R Wilson |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The International journal of prosthodontics Volume: 14 ISSN: 0893-2174 ISO Abbreviation: Int J Prosthodont Publication Date: 2001 Jan-Feb |
Date Detail:
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Created Date: 2002-02-14 Completed Date: 2002-03-07 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8900938 Medline TA: Int J Prosthodont Country: United States |
Other Details:
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Languages: eng Pagination: 53-7 Citation Subset: D |
Affiliation:
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The University of Melbourne, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bicuspid Cementation* Crowns* Dental Alloys Dental Pulp / physiopathology* Dental Pulp Cavity / physiopathology Humans Oscillometry Pressure Rheology Signal Processing, Computer-Assisted Statistics as Topic Statistics, Nonparametric Stress, Mechanical Time Factors Transducers, Pressure Zinc Phosphate Cement / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Dental Alloys; 7779-90-0/Zinc Phosphate Cement |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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