{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T21:12:57Z","timestamp":1792271577087,"version":"4.4.0"},"reference-count":39,"publisher":"Public Library of Science (PLoS)","issue":"6","license":[{"start":{"date-parts":[[2022,6,24]],"date-time":"2022-06-24T00:00:00Z","timestamp":1656028800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100013041","name":"Vice-Chancellor for Research, Shiraz University of Medical Sciences","doi-asserted-by":"publisher","award":["22710"],"award-info":[{"award-number":["22710"]}],"id":[{"id":"10.13039\/501100013041","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:p>Structural durability of screw-cement-retained implant-supported zirconia-based restorations is an important factor in choosing the best type of restoration for clinical use. This study aimed to evaluate the effects of thermocycling on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restoration. Two experimental groups (monolithic zirconia and porcelain-veneered zirconia) and a control group of porcelain-fused-to-metal restorations were fabricated via CAD-CAM (<jats:italic>n<\/jats:italic> = 14 per group). Half of the specimens of each group (<jats:italic>n<\/jats:italic> = 7) were subjected to 10000 thermal cycles. The compressive force was applied and the force leading to fracture was measured by using a Universal Testing Machine. The fractured modes were classified under a scanning electron microscope. The data were analyzed through two-way ANOVA, one-way ANOVA, and independent samples t-test (<jats:italic>\u03b1<\/jats:italic> = 0.05). Among the non-thermocycled subgroups, the monolithic zirconia specimens were significantly more fracture-resistant than the porcelain-veneered zirconia and porcelain-fused-to-metal groups (<jats:italic>P<\/jats:italic>&lt;0.05); but it was not the same with aging (<jats:italic>P<\/jats:italic>&gt;0.05). Thermocycling decreased the fracture resistance of all groups; however, the difference was not statistically significant (<jats:italic>P<\/jats:italic>&lt;0.05). The monolithic zirconia presented higher fracture resistance than the bilayered restorations for screw-cement retained implant-supported restorations. Thermocycling decreased the fracture resistance of all types of restorations insignificantly which can be clinically important.<\/jats:p>","DOI":"10.1371\/journal.pone.0270527","type":"journal-article","created":{"date-parts":[[2022,6,24]],"date-time":"2022-06-24T17:59:47Z","timestamp":1656093587000},"page":"e0270527","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":14,"title":["The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations"],"prefix":"10.1371","volume":"17","author":[{"given":"Safoora","family":"Sahebi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1091-9574","authenticated-orcid":true,"given":"Rashin","family":"Giti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arian","family":"Sherafati","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2022,6,24]]},"reference":[{"key":"pone.0270527.ref001","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1016\/j.jpor.2019.09.003","article-title":"Fracture loads of screw-retained implant-supported zirconia prostheses after thermal and mechanical stress","volume":"64","author":"J Honda","year":"2020","journal-title":"J Prosthodont Res"},{"key":"pone.0270527.ref002","doi-asserted-by":"crossref","first-page":"1119","DOI":"10.1111\/clr.12926","article-title":"Fracture resistance of implant\u2010supported screw\u2010retained zirconia\u2010based molar restorations","volume":"28","author":"J Honda","year":"2017","journal-title":"Clin Oral Implants Res"},{"key":"pone.0270527.ref003","doi-asserted-by":"crossref","first-page":"181","DOI":"10.15171\/joddd.2016.029","article-title":"Effect of screw access hole preparation on fracture load of implant-supported zirconia-based crowns: an in vitro study","volume":"10","author":"H Mokhtarpour","year":"2016","journal-title":"J Dent Res Dent Clin Dent Prospects"},{"key":"pone.0270527.ref004","first-page":"34","article-title":"The combination implant crown: a cement- and screw-retained restoration","volume":"13","author":"EA McGlumphy","year":"1992","journal-title":"Compendium"},{"key":"pone.0270527.ref005","doi-asserted-by":"crossref","first-page":"398","DOI":"10.1016\/j.prosdent.2015.03.018","article-title":"Effect of a zirconia primer on the push-out bond strength of zirconia ceramic posts to root canal dentin","volume":"114","author":"M Torabi Ardakani","year":"2015","journal-title":"J Prosthet Dent"},{"key":"pone.0270527.ref006","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1016\/j.sdentj.2019.02.045","article-title":"The influence of different shades and brands of resin-based luting agents on the final color of leucite-reinforced veneering ceramic","volume":"31","author":"R Giti","year":"2019","journal-title":"Saudi Dent J"},{"key":"pone.0270527.ref007","doi-asserted-by":"crossref","first-page":"31","DOI":"10.11607\/ijp.4328","article-title":"Ten-year follow-up of implant-supported all-ceramic fixed dental prostheses: A randomized, prospective clinical trial","volume":"29","author":"C Larsson","year":"2016","journal-title":"Int J Prosthodont"},{"key":"pone.0270527.ref008","first-page":"45","article-title":"All-ceramic two-to five-unit implant-supported reconstructions. 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