Effect of retention design of artificial teeth and implant-supported titanium CAD-CAM structures on fracture resistance
Identifieur interne : 000868 ( Main/Exploration ); précédent : 000867; suivant : 000869Effect of retention design of artificial teeth and implant-supported titanium CAD-CAM structures on fracture resistance
Auteurs : Kristin Ladetzki [Espagne] ; Rocío Mateos-Palacios [Espagne] ; Agustín Pascual-Moscard [Espagne] ; Eduardo J. Selva-Otaolaurruchi [Espagne]Source :
- Journal of Clinical and Experimental Dentistry [ 1989-5488 ] ; 2016.
Abstract
For implant-supported hybrid prostheses, high mastication forces and reduced acrylic resin thickness over a metal substructure often cause failures arising from tooth or resin fractures. To assay fracture resistance of artificial teeth and resin in implant-supported hybrid prostheses in relation to the titanium structure and retention design supporting teeth.
40 specimens bearing incisors were divided into four groups according to the titanium structure supporting the teeth and the type of load force applied: Group I (Control; n=10): Application of static loading to ten incisors set over a metal structure with internal retention. Group II (Control; n=10): Application of static loading to ten incisors set over a metal structure with external retention. The remaining study specimens (n=20) were subjected to 120,000 masticatory and thermal cycles in a chewing simulator. Afterwards, static loading was applied until the point of fracture using an Instron machine. Group III (Study; n=10): Application of dynamic and static loading to ten incisors set over a metal structure with internal retention. Group IV (Study; n=10): Application of dynamic and static loading to ten incisors set over a metal structure with external retention. Data obtained for the four groups was analyzed and compared, determining the type of fracture (cohesive or adhesive) using a reflected light microscope.
Statistical analysis confirmed that there were significant differences in fracture resistance between the four groups. External retention was found to have more fracture resistance than the internal retention.
Hybrid prostheses with titanium substructures and external retention obtained significantly better results than samples with internal retention.
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DOI: 10.4317/jced.52228
PubMed: 27034748
PubMed Central: 4808303
Affiliations:
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titanium CAD-CAM structures on fracture resistance</title><author><name sortKey="Ladetzki, Kristin" sort="Ladetzki, Kristin" uniqKey="Ladetzki K" first="Kristin" last="Ladetzki">Kristin Ladetzki</name><affiliation wicri:level="1"><nlm:aff id="A1">Prosthodontics and Occlusion, University of Valencia, Valencia, Spain</nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Prosthodontics and Occlusion, University of Valencia, Valencia</wicri:regionArea><wicri:noRegion>Valencia</wicri:noRegion></affiliation></author><author><name sortKey="Mateos Palacios, Rocio" sort="Mateos Palacios, Rocio" uniqKey="Mateos Palacios R" first="Rocío" last="Mateos-Palacios">Rocío Mateos-Palacios</name><affiliation wicri:level="1"><nlm:aff id="A1">Prosthodontics and Occlusion, University of Valencia, Valencia, Spain</nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Prosthodontics and Occlusion, University of Valencia, Valencia</wicri:regionArea><wicri:noRegion>Valencia</wicri:noRegion></affiliation></author><author><name sortKey="Pascual Moscard, Agustin" sort="Pascual Moscard, Agustin" uniqKey="Pascual Moscard A" first="Agustín" last="Pascual-Moscard">Agustín Pascual-Moscard</name><affiliation wicri:level="1"><nlm:aff id="A2">Dental Materials, University of Valencia, Valencia, Spain</nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Dental Materials, University of Valencia, Valencia</wicri:regionArea><wicri:noRegion>Valencia</wicri:noRegion></affiliation></author><author><name sortKey="Selva Otaolaurruchi, Eduardo J" sort="Selva Otaolaurruchi, Eduardo J" uniqKey="Selva Otaolaurruchi E" first="Eduardo J." last="Selva-Otaolaurruchi">Eduardo J. Selva-Otaolaurruchi</name><affiliation wicri:level="1"><nlm:aff id="A1">Prosthodontics and Occlusion, University of Valencia, Valencia, Spain</nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Prosthodontics and Occlusion, University of Valencia, Valencia</wicri:regionArea><wicri:noRegion>Valencia</wicri:noRegion></affiliation></author></analytic><series><title level="j">Journal of Clinical and Experimental Dentistry</title><idno type="eISSN">1989-5488</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>For implant-supported hybrid prostheses, high mastication forces and reduced acrylic resin thickness over a metal substructure often cause failures arising from tooth or resin fractures. To assay fracture resistance of artificial teeth and resin in implant-supported hybrid prostheses in relation to the titanium structure and retention design supporting teeth.</p></sec><sec><title>Material and Methods</title><p>40 specimens bearing incisors were divided into four groups according to the titanium structure supporting the teeth and the type of load force applied: Group I (Control; n=10): Application of static loading to ten incisors set over a metal structure with internal retention. Group II (Control; n=10): Application of static loading to ten incisors set over a metal structure with external retention. The remaining study specimens (n=20) were subjected to 120,000 masticatory and thermal cycles in a chewing simulator. Afterwards, static loading was applied until the point of fracture using an Instron machine. Group III (Study; n=10): Application of dynamic and static loading to ten incisors set over a metal structure with internal retention. Group IV (Study; n=10): Application of dynamic and static loading to ten incisors set over a metal structure with external retention. Data obtained for the four groups was analyzed and compared, determining the type of fracture (cohesive or adhesive) using a reflected light microscope.</p></sec><sec><title>Results</title><p>Statistical analysis confirmed that there were significant differences in fracture resistance between the four groups. External retention was found to have more fracture resistance than the internal retention.</p></sec><sec><title>Conclusions</title><p>Hybrid prostheses with titanium substructures and external retention obtained significantly better results than samples with internal retention.</p><p><bold> Key words:</bold>Chewing simulator, thermocycler, fatigue, implant-supported hybrid prosthesis, acrylic teeth, fracture, metal structure design.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Eichner, Ck" uniqKey="Eichner C">CK Eichner</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Barbosa, Db" uniqKey="Barbosa D">DB Barbosa</name></author><author><name sortKey="Barao, Va" uniqKey="Barao V">VA Barão</name></author><author><name sortKey="Monteiro, Dr" uniqKey="Monteiro D">DR Monteiro</name></author><author><name sortKey="Compagnoni, Ma" uniqKey="Compagnoni M">MA Compagnoni</name></author><author><name 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sort="Selva Otaolaurruchi, Eduardo J" uniqKey="Selva Otaolaurruchi E" first="Eduardo J." last="Selva-Otaolaurruchi">Eduardo J. 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