Fracture force, deflection at fracture, and toughness of repaired denture resin subjected to microwave polymerization or reinforced with wire or glass fiber

Polyzois, GL; Tarantili, PA; Frangou, MJ; Andreopoulos, AG

dc.contributor.author	Polyzois, GL	en
dc.contributor.author	Tarantili, PA	en
dc.contributor.author	Frangou, MJ	en
dc.contributor.author	Andreopoulos, AG	en
dc.date.accessioned	2014-03-01T01:16:36Z
dc.date.available	2014-03-01T01:16:36Z
dc.date.issued	2001	en
dc.identifier.issn	0022-3913	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14108
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	glass	en
dc.subject.other	glass fiber	en
dc.subject.other	Meliodent	en
dc.subject.other	metal	en
dc.subject.other	methacrylic acid methyl ester	en
dc.subject.other	polymer	en
dc.subject.other	analysis of variance	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	dental care	en
dc.subject.other	dental surgery	en
dc.subject.other	denture	en
dc.subject.other	heat	en
dc.subject.other	human	en
dc.subject.other	materials testing	en
dc.subject.other	microwave radiation	en
dc.subject.other	nonparametric test	en
dc.subject.other	Analysis of Variance	en
dc.subject.other	Dental Restoration Failure	en
dc.subject.other	Dental Stress Analysis	en
dc.subject.other	Denture Repair	en
dc.subject.other	Glass	en
dc.subject.other	Heat	en
dc.subject.other	Human	en
dc.subject.other	Materials Testing	en
dc.subject.other	Metals	en
dc.subject.other	Methylmethacrylates	en
dc.subject.other	Microwaves	en
dc.subject.other	Polymers	en
dc.subject.other	Statistics, Nonparametric	en
dc.title	Fracture force, deflection at fracture, and toughness of repaired denture resin subjected to microwave polymerization or reinforced with wire or glass fiber	en
heal.type	journalArticle	en
heal.identifier.primary	10.1067/mpr.2001.120069	en
heal.identifier.secondary	http://dx.doi.org/10.1067/mpr.2001.120069	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	Statement of problem. The ultimate goal of denture repair is to restore the denture's original strength and avoid further fracture. The best materials and methods for repair have not been conclusively determined. Purpose. This study investigated the fracture force, deflection at fracture, and toughness of a heat-polymerized denture base material repaired with heat-polymerized resin, autopolymerized resin alone, or autopolymerized resin with glass fiber or wire reinforcement. Material and methods. Eight groups were evaluated: 6 with autopolymerized resin repairs, 1 with heat-polymerized resin repairs, and a control group of intact specimens. The 6 autopolymerized resin groups included 1 group xvith no reinforcement, 1 treated with microwave irradiation after polymerization, 2 with monolayer or multilayer glass fiber reinforcement, and 2 with round or braided wire reinforcement. Each group consisted of 12 specimens. The experimental specimens were cut, and a 3-mm butt joint gap was repaired as indicated by the group assignment. A 3-point bending test was used to determine the fracture force, deflection at fracture, and toughness of the specimens. The data were analyzed with 1-way analysis of variance and the Tukey post-hoc test (alpha=.05). Results. The fracture force (28.4 to 73.4 N), deflection (1.6 to 3.8 mm), and toughness (0.02 to 0.13 J) values for all repaired groups were significantly lower than those for the control group (82.79 N, 4.4 mm, and 0.16 J, respectively), with one exception: the mean fracture force of specimens reinforced with round wire (102.9 N). Failure mode was always adhesive, meaning that fracture occurred between the denture base and repair resin. Conclusion. Among the repair treatments tested, the most effective was microwave-irradiated, autopolymerized resin reinforced with round wire or monolayer glass fiber ribbon.	en
heal.publisher	MOSBY, INC	en
heal.journalName	Journal of Prosthetic Dentistry	en
dc.identifier.doi	10.1067/mpr.2001.120069	en
dc.identifier.isi	ISI:000172981300012	en
dc.identifier.volume	86	en
dc.identifier.issue	6	en
dc.identifier.spage	613	en
dc.identifier.epage	619	en