Fracture resistance of ceramic crowns supported with indirect chair-side composite cores

Aims and Objectives: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying IPS e.max Press crowns.Materials and Methods: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sec...

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Published in:Journal of International Society of Preventive and Community Dentistry 2018-01, Vol.8 (1), p.34-40
Main Authors: Abdelaziz, Khalid, Keshk, Cinderella, Alshadidi, Abdulkhaliq, Mafraq, Salman, Murchison, David
Format: Article
Language:English
Subjects:
Adhesives
Biomechanics
Bond strength
Composite materials
Dental cement
Dentin
Dentistry
Diamonds
Dietary fiber
Kruskal-Wallis test
Light
Original
Polymerization
Premolars
Resins
Root canals
Success
Teeth
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creator Abdelaziz, Khalid
Keshk, Cinderella
Alshadidi, Abdulkhaliq
Mafraq, Salman
Murchison, David
description Aims and Objectives: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying IPS e.max Press crowns.Materials and Methods: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sectioned 2 mm above the cervical line. In Groups 1-3 (n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites. In Groups 4-6 (n = 10 each), the fabricated post-core systems were subjected to post-curing heat and pressure treatment before cementation to their respective teeth using self-adhesive resin cement. Another 10 sound premolars served as control. All teeth in the test and control groups were then subjected to standardized preparation to receive IPS e.max Press crowns before testing their fracture resistance and the mode of restorations' failure. The collected results were statistically analyzed using ANOVA, Kruskal-Wallis, and Tukey's tests on the past software used at α = 0.05 to stand on the significance of the detected differences. Results: Significant differences were detected between the fracture resistance of teeth in different groups (ANOVA, P = 2.857E-35). Crowns in Groups 4-6 provided higher fracture resistance than those in Groups 1-3 (Tukey's test, P < 0.05). Crowns in Groups 4 and 6 provided higher fracture resistance than the control, while those in Groups 2 and 3 provided lower fracture resistance than the control (Tukey's test, P < 0.05). Conclusion: Indirect composite cores improved the fracture resistance of IPS e.max Press crowns when compared to directly fabricated post and cores. The directly and indirectly polymerized nanohybrid, methacrylate-based composite (Filtek Z250 XT) cores yielded the highest fracture resistance for the utilized all-ceramic crowns.
doi_str_mv 10.4103/jispcd.JISPCD_381_17
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In Groups 1-3 (n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites. In Groups 4-6 (n = 10 each), the fabricated post-core systems were subjected to post-curing heat and pressure treatment before cementation to their respective teeth using self-adhesive resin cement. Another 10 sound premolars served as control. All teeth in the test and control groups were then subjected to standardized preparation to receive IPS e.max Press crowns before testing their fracture resistance and the mode of restorations' failure. The collected results were statistically analyzed using ANOVA, Kruskal-Wallis, and Tukey's tests on the past software used at α = 0.05 to stand on the significance of the detected differences. Results: Significant differences were detected between the fracture resistance of teeth in different groups (ANOVA, P = 2.857E-35). Crowns in Groups 4-6 provided higher fracture resistance than those in Groups 1-3 (Tukey's test, P &lt; 0.05). Crowns in Groups 4 and 6 provided higher fracture resistance than the control, while those in Groups 2 and 3 provided lower fracture resistance than the control (Tukey's test, P &lt; 0.05). Conclusion: Indirect composite cores improved the fracture resistance of IPS e.max Press crowns when compared to directly fabricated post and cores. The directly and indirectly polymerized nanohybrid, methacrylate-based composite (Filtek Z250 XT) cores yielded the highest fracture resistance for the utilized all-ceramic crowns.</description><identifier>ISSN: 2231-0762</identifier><identifier>EISSN: 2250-1002</identifier><identifier>DOI: 10.4103/jispcd.JISPCD_381_17</identifier><identifier>PMID: 29629327</identifier><language>eng</language><publisher>Mumbai: Medknow Publications &amp; Media Pvt. Ltd</publisher><subject>Adhesives ; Biomechanics ; Bond strength ; Composite materials ; Dental cement ; Dentin ; Dentistry ; Diamonds ; Dietary fiber ; Kruskal-Wallis test ; Light ; Original ; Polymerization ; Premolars ; Resins ; Root canals ; Success ; Teeth</subject><ispartof>Journal of International Society of Preventive and Community Dentistry, 2018-01, Vol.8 (1), p.34-40</ispartof><rights>Copyright Medknow Publications &amp; Media Pvt. Ltd. Jan/Feb 2018</rights><rights>Copyright: © 2018 Journal of International Society of Preventive and Community Dentistry 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c436t-9a508be60091ce17bb8c7ecbac1d2ef0c1a9387b187fcf8f46937480720827283</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853040/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853040/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,315,733,786,790,891,27957,27958,53827,53829</link.rule.ids></links><search><creatorcontrib>Abdelaziz, Khalid</creatorcontrib><creatorcontrib>Keshk, Cinderella</creatorcontrib><creatorcontrib>Alshadidi, Abdulkhaliq</creatorcontrib><creatorcontrib>Mafraq, Salman</creatorcontrib><creatorcontrib>Murchison, David</creatorcontrib><title>Fracture resistance of ceramic crowns supported with indirect chair-side composite cores</title><title>Journal of International Society of Preventive and Community Dentistry</title><description>Aims and Objectives: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying IPS e.max Press crowns.Materials and Methods: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sectioned 2 mm above the cervical line. In Groups 1-3 (n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites. In Groups 4-6 (n = 10 each), the fabricated post-core systems were subjected to post-curing heat and pressure treatment before cementation to their respective teeth using self-adhesive resin cement. Another 10 sound premolars served as control. All teeth in the test and control groups were then subjected to standardized preparation to receive IPS e.max Press crowns before testing their fracture resistance and the mode of restorations' failure. The collected results were statistically analyzed using ANOVA, Kruskal-Wallis, and Tukey's tests on the past software used at α = 0.05 to stand on the significance of the detected differences. Results: Significant differences were detected between the fracture resistance of teeth in different groups (ANOVA, P = 2.857E-35). Crowns in Groups 4-6 provided higher fracture resistance than those in Groups 1-3 (Tukey's test, P &lt; 0.05). Crowns in Groups 4 and 6 provided higher fracture resistance than the control, while those in Groups 2 and 3 provided lower fracture resistance than the control (Tukey's test, P &lt; 0.05). Conclusion: Indirect composite cores improved the fracture resistance of IPS e.max Press crowns when compared to directly fabricated post and cores. 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In Groups 1-3 (n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites. In Groups 4-6 (n = 10 each), the fabricated post-core systems were subjected to post-curing heat and pressure treatment before cementation to their respective teeth using self-adhesive resin cement. Another 10 sound premolars served as control. All teeth in the test and control groups were then subjected to standardized preparation to receive IPS e.max Press crowns before testing their fracture resistance and the mode of restorations' failure. The collected results were statistically analyzed using ANOVA, Kruskal-Wallis, and Tukey's tests on the past software used at α = 0.05 to stand on the significance of the detected differences. Results: Significant differences were detected between the fracture resistance of teeth in different groups (ANOVA, P = 2.857E-35). Crowns in Groups 4-6 provided higher fracture resistance than those in Groups 1-3 (Tukey's test, P &lt; 0.05). Crowns in Groups 4 and 6 provided higher fracture resistance than the control, while those in Groups 2 and 3 provided lower fracture resistance than the control (Tukey's test, P &lt; 0.05). Conclusion: Indirect composite cores improved the fracture resistance of IPS e.max Press crowns when compared to directly fabricated post and cores. The directly and indirectly polymerized nanohybrid, methacrylate-based composite (Filtek Z250 XT) cores yielded the highest fracture resistance for the utilized all-ceramic crowns.</abstract><cop>Mumbai</cop><pub>Medknow Publications &amp; Media Pvt. Ltd</pub><pmid>29629327</pmid><doi>10.4103/jispcd.JISPCD_381_17</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Adhesives
Biomechanics
Bond strength
Composite materials
Dental cement
Dentin
Dentistry
Diamonds
Dietary fiber
Kruskal-Wallis test
Light
Original
Polymerization
Premolars
Resins
Root canals
Success
Teeth
title Fracture resistance of ceramic crowns supported with indirect chair-side composite cores
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