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Effect of prolonged water storage and repeated thermocycling on the reinforcing ability of refrigerated Amalgambond Plus/High Performance Additive in third molars with large mesio-occlusodistal amalgam restorations

This in vitro investigation examined what effect prolonged water immersion and repeated thermocycling had on the fracture strength of extracted third molars restored with refrigerated Amalgambond Plus with High Performance Additive (AB+/HPA) and Tytin amalgam. Mesio-occlusodistal (MOD) channels were...

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Published in:Military medicine 2002-09, Vol.167 (9), p.711-714
Main Authors: HAGGE, Mark S, LINDEMUTH, James S
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LINDEMUTH, James S
description This in vitro investigation examined what effect prolonged water immersion and repeated thermocycling had on the fracture strength of extracted third molars restored with refrigerated Amalgambond Plus with High Performance Additive (AB+/HPA) and Tytin amalgam. Mesio-occlusodistal (MOD) channels were prepared in one member from each of 19 contralateral pairs. After restoration, specimens were stored in water for 6 months, with thermocycling repeated every 2 months. Specimens were fractured in a universal testing machine, and the data were analyzed. Secondary effects of tooth location and tooth size were also examined. Fracture strengths of prepared/restored teeth were not statistically different from those of intact contralateral pairs (p > 0.05). Maxillary teeth had lower fracture strengths than mandibular teeth, and tooth size had no effect on fracture strength. Extracted molars with large MOD amalgam restorations bonded with refrigerated AB+/HPA had fracture strengths equivalent to those of intact contralateral pairs after 6 months of water storage and repeated thermocycling.
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Mesio-occlusodistal (MOD) channels were prepared in one member from each of 19 contralateral pairs. After restoration, specimens were stored in water for 6 months, with thermocycling repeated every 2 months. Specimens were fractured in a universal testing machine, and the data were analyzed. Secondary effects of tooth location and tooth size were also examined. Fracture strengths of prepared/restored teeth were not statistically different from those of intact contralateral pairs (p &gt; 0.05). Maxillary teeth had lower fracture strengths than mandibular teeth, and tooth size had no effect on fracture strength. Extracted molars with large MOD amalgam restorations bonded with refrigerated AB+/HPA had fracture strengths equivalent to those of intact contralateral pairs after 6 months of water storage and repeated thermocycling.</description><identifier>ISSN: 0026-4075</identifier><identifier>EISSN: 1930-613X</identifier><identifier>DOI: 10.1093/milmed/167.9.711</identifier><identifier>PMID: 12363158</identifier><identifier>CODEN: MMEDA9</identifier><language>eng</language><publisher>Bethesda, MD: Association of Military Surgeons</publisher><subject>Biological and medical sciences ; Bond strength ; Compressive Strength ; Dental Alloys ; Dental Bonding - standards ; Dental Restoration, Permanent ; Dentin ; Dentin-Bonding Agents ; Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics ; Humans ; Materials Testing ; Maxillofacial surgery. Dental surgery. 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Extracted molars with large MOD amalgam restorations bonded with refrigerated AB+/HPA had fracture strengths equivalent to those of intact contralateral pairs after 6 months of water storage and repeated thermocycling.</abstract><cop>Bethesda, MD</cop><pub>Association of Military Surgeons</pub><pmid>12363158</pmid><doi>10.1093/milmed/167.9.711</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record>
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ispartof Military medicine, 2002-09, Vol.167 (9), p.711-714
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1930-613X
language eng
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source Oxford Journals Online
subjects Biological and medical sciences
Bond strength
Compressive Strength
Dental Alloys
Dental Bonding - standards
Dental Restoration, Permanent
Dentin
Dentin-Bonding Agents
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Humans
Materials Testing
Maxillofacial surgery. Dental surgery. Orthodontics
Medical sciences
Methacrylates
Nondestructive testing
Statistics, Nonparametric
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Teeth
Temperature
Water
title Effect of prolonged water storage and repeated thermocycling on the reinforcing ability of refrigerated Amalgambond Plus/High Performance Additive in third molars with large mesio-occlusodistal amalgam restorations
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