TODENTJ-25-03-2019_TODENTJ-7-181 1553505500 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 12 30 2013 7 1 Sufyan Garoushi Enas Mangoush Mangoush Vallittu Lippo Lassila Objectives: To determine the static load-bearing capacity of direct composite onlay restorations made of novel filling composite resin system which combines short fiber-reinforced composite resin (FC) and conventional particulate filler composite resin (PFC). Methods: Three groups of onlay restorations were fabricated (n = 8/group); Group A: made from conventional particulate filler composite resin (Z250, 3M-ESPE, USA, control), Group B: made from short fiber-reinforced composite resin (EverX posterior, StickTeck Ltd, member of GC group, Turku, Finland) as substructure with 1 mm surface layer of PFC, Group C: made from FC composite resin. The specimens were incrementally polymerized with a hand-light curing unit for 80 s before they were statically loaded with two different sizes (3 & 6 mm) of steel ball until fracture. Failure modes were visually examined. Data were analyzed using ANOVA (p = 0.05). Results: ANOVA revealed that onlay restorations made from FC composite resin had statistically significantly higher load-bearing capacity (1733 N) ( p < 0.05) than the control PFC composite resin (1081 N). Onlays made of FC composite resin with a surface layer of PFC gave force values of 1405 N which was statistically higher than control group ( p < 0.05). No statistically significant difference was found in the load-bearing capacity between groups loaded by different ball sizes Significance: Onlay restorations combining base of short fiber reinforced composite resin as substructure and surface layer of conventional composite resin displayed promising performance in high load bearing areas. 12 30 2013 181 185 TODENTJ-7-181 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2013-8-26 2013-12-10 2013-12-17 2013-12-30 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210601307010181 1553505500 https://opendentistryjournal.com/VOLUME/7/PAGE/181/ https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-181/TODENTJ-7-181.xml Acta Odontol Scand Garoushi S 64 281 2006 Garoushi S, Lassila LVJ, Vallittu PK. 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