{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T21:54:24Z","timestamp":1782770064142,"version":"3.54.5"},"reference-count":48,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T00:00:00Z","timestamp":1749600000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"AiF Projekt GmbH, Berlin, Germany, ZIM-Kooperationsprojekte, Projekttr\u00e4ger des BMWK","award":["ZF4052008BA8"],"award-info":[{"award-number":["ZF4052008BA8"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The aim of this study was to evaluate the influence of filler type, filler content, and filler silanization on the flexural strength (FX), elastic modulus (Em), shore D hardness (SDH), and two-body wear (2BW) of polyaryletherketone (PAEK) compounds. Specimens (40 wt% PEEK, 40 wt% PEK) with different filler types: 20 wt%: fumed silica (FS), calcium silicate (CS), feldspar (FP), magnesium silicate hydrate (MSH), no filler (NF); different filler content: 20, 25 or 30 wt% CS; different filler silanization: 20 wt% CS silanized with alkylsilane\/aminosilane, FP silanized with methylsilane\/ vinylsilane, no silanization; and PEEK20 (BioHPP) or PEEK25 (BioHPP plus) controls were fabricated and tested for FX, Em, and SDH. Two-body wear (4 \u00d7 100,000 cycles, 50 N, 2.5 Hz) with composite resin antagonists was measured with PAEKi (35 wt% PEEK, 35 wt% PEK, 30 wt% CS), PAEKii (70 wt% PEEK, 30 wt% CS), PAEKiii (70 wt% PEEK, 25 wt% CS, 5 wt% FP), and PEEK20 controls. Data were analyzed with Kolmogorov\u2013Smirnov-, Kruskal\u2013Wallis-H-, post hoc Scheff\u00e9 test, pairwise comparisons, Bonferroni correction, one-way ANOVA, and Spearman rho (\u03b1 = 0.05). An abrasion area analysis was performed. Adding filler increased FX, Em, and SDH, with CS and MSH showing the highest values for FX and Em. Adding 30 wt% CS increased FX, Em, and SDH compared with 20 wt%. Silanization with methylsilane increased FX, Em, and SDH. Silanization with aminosilane increased FX and SDH. PEEK20 showed the lowest 2BW compared with all EPCs. No material losses were detected on the antagonists. PAEK compounds with 25 to 30 wt% CS increased FX and Em compared to lower contents, no filler, or PEEK20. Higher values of FX and Em did not lead to lower 2BW.<\/jats:p>","DOI":"10.3390\/ma18122736","type":"journal-article","created":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T05:23:16Z","timestamp":1749619396000},"page":"2736","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Effect of Filler Type, Content, and Silanization on the Flexural Strength, Elastic Modulus, Shore D Hardness, and Two-Body Wear of PAEK Compounds"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4208-4794","authenticated-orcid":false,"given":"Felix","family":"Schmeiser","sequence":"first","affiliation":[{"name":"Dental Materials Unit, Department of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-8023-1395","authenticated-orcid":false,"given":"Wofgang","family":"Schramm","sequence":"additional","affiliation":[{"name":"Department of Chemical Development, bredent GmbH & Co. KG, 89250 Senden, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0089-9995","authenticated-orcid":false,"given":"Felicitas","family":"Mayinger","sequence":"additional","affiliation":[{"name":"Dental Materials Unit, Department of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4693-6969","authenticated-orcid":false,"given":"Uwe","family":"Baumert","sequence":"additional","affiliation":[{"name":"Mechanobiology and Genetics Research Area, Department of Orthodontics and Dentofacial Orthopedics, University Hospital, LMU Munich, 80336 Munich, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1732-3255","authenticated-orcid":false,"given":"Bogna","family":"Stawarczyk","sequence":"additional","affiliation":[{"name":"Dental Materials Unit, Department of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,6,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"109495","DOI":"10.1016\/j.compositesb.2021.109495","article-title":"Dental resin composites: A review on materials to product realizations","volume":"230","author":"Cho","year":"2022","journal-title":"Compos. Part B Eng."},{"key":"ref_2","first-page":"e31042","article-title":"A Sneak Peek Toward Polyaryletherketone (PAEK) Polymer: A Review","volume":"14","author":"Maloo","year":"2022","journal-title":"Cureus"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/j.jare.2020.09.004","article-title":"Polyetherketoneketone (PEKK): An emerging biomaterial for oral implants and dental prostheses","volume":"28","author":"Alqurashi","year":"2020","journal-title":"J. Adv. Res."},{"key":"ref_4","unstructured":"Tanguy, C. (2017). Mechanical Performances of PEKK Thermoplastic Composites Linked to Their Processing Parameters. [Ph.D. Dissertation, l\u2019\u00c9cole Nationale Sup\u00e9rieure d\u2019Arts et M\u00e9tiers]."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1845","DOI":"10.1080\/09205063.2022.2088524","article-title":"A preliminary study on surface bioactivation of polyaryletherketone by UV-grafting with PolyNaSS: Influence on osteogenic and antibacterial activities","volume":"33","author":"Wang","year":"2022","journal-title":"J. Biomater. Sci. Polym. Ed."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"463","DOI":"10.55095\/achot2010\/077","article-title":"Polyetheretherketon (PEEK)\u2014I. \u010d\u00e1st: Perspektivn\u00ed materi\u00e1l pro ortopedickou a traumatologickou praxi [Polyetheretherketone (PEEK). Part I: Prospects for use in orthopaedics and traumatology]","volume":"77","author":"Slouf","year":"2010","journal-title":"Acta Chir. Orthop. Traumatol. Cech."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Wang, B., Huang, M., Dang, P., Xie, J., Zhang, X., and Yan, X. (2022). PEEK in Fixed Dental Prostheses: Application and Adhesion Improvement. Polymers, 14.","DOI":"10.3390\/polym14122323"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"e2300032","DOI":"10.1002\/mabi.202300032","article-title":"Research and Application of Medical Polyetheretherketone as Bone Repair Material","volume":"23","author":"Pu","year":"2023","journal-title":"Macromol. Biosci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"594","DOI":"10.4012\/dmj.2015-249","article-title":"Retention force of differently fabricated telescopic PEEK crowns with different tapers","volume":"35","author":"Stock","year":"2016","journal-title":"Dent. Mater. J."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/j.dental.2019.11.017","article-title":"Comparison of various 3D printed and milled PAEK materials: Effect of printing direction and artificial aging on Martens parameters","volume":"36","author":"Prechtel","year":"2020","journal-title":"Dent. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.jpor.2015.10.001","article-title":"Applications of polyetheretherketone (PEEK) in oral implantology and prosthodontics","volume":"60","author":"Najeeb","year":"2016","journal-title":"J. Prosthodont. Res."},{"key":"ref_12","first-page":"e46485","article-title":"Polyetheretherketone Material in Dentistry","volume":"15","author":"Parate","year":"2023","journal-title":"Cureus"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"62","DOI":"10.21608\/adjalexu.2018.57626","article-title":"Evaluation of shear bond strength of high-performance polymers to its resin veenering and to dentin (in vitro study)","volume":"43","author":"Yousry","year":"2018","journal-title":"Alex. Dent. J."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"111823","DOI":"10.1016\/j.msec.2020.111823","article-title":"Photofunctionalization effect and biological ageing of PEEK, TiO2 and ZrO2 abutments material","volume":"121","author":"Roy","year":"2021","journal-title":"Mater. Sci. Eng. C Mater. Biol. Appl."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"295","DOI":"10.4103\/jips.jips_86_21","article-title":"Evaluation of the failure modes and load-bearing capacity of different surface-treated polyether ether ketone copings veneered with lithium di-silicate compared to polyether ether ketone copings veneered with composite: An in vitro study","volume":"21","author":"Gupta","year":"2021","journal-title":"J. Indian Prosthodont. Soc."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1055\/s-0041-1731833","article-title":"Mechanical Response of PEKK and PEEK As Frameworks for Implant-Supported Full-Arch Fixed Dental Prosthesis: 3D Finite Element Analysis","volume":"16","author":"Villefort","year":"2022","journal-title":"Eur. J. Dent."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Abhay, S.S., Ganapathy, D., Veeraiyan, D.N., Ariga, P., Heboyan, A., Amornvit, P., Rokaya, D., and Srimaneepong, V. (2021). Wear Resistance, Color Stability and Displacement Resistance of Milled PEEK Crowns Compared to Zirconia Crowns under Stimulated Chewing and High-Performance Aging. Polymers, 13.","DOI":"10.3390\/polym13213761"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1186\/s12903-020-01202-7","article-title":"The use of PEEK in digital prosthodontics: A narrative review","volume":"20","author":"Papathanasiou","year":"2020","journal-title":"BMC Oral Health"},{"key":"ref_19","unstructured":"Kutz, M. (2011). Nanocomposites: Preparation, Structure, and Properties. Applied Plastics Engineering Handbook, Elsevier."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"108852","DOI":"10.1016\/j.compositesb.2021.108852","article-title":"A review of dental composites: Challenges, chemistry aspects, filler influences, and future insights","volume":"216","author":"Aminoroaya","year":"2021","journal-title":"Compos. Part B Eng."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"880","DOI":"10.1016\/j.dental.2017.04.013","article-title":"Academy of Dental Materials guidance\u2014Resin composites: Part I\u2014Mechanical properties","volume":"33","author":"Ilie","year":"2017","journal-title":"Dent. Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1016\/j.msec.2019.03.090","article-title":"Development of mechanical properties in dental resin composite: Effect of filler size and filler aggregation state","volume":"101","author":"Kriven","year":"2019","journal-title":"Mater. Sci. Eng. C Mater. Biol. Appl."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"968","DOI":"10.1016\/j.dental.2017.06.005","article-title":"Different PEEK qualities irradiated with light of different wavelengths: Impact on Martens hardness","volume":"33","author":"Eichberger","year":"2017","journal-title":"Dent. Mater."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"e20160652","DOI":"10.1590\/1678-7757-2016-0652","article-title":"Effect of filler size and filler loading on wear of experimental flowable resin composites","volume":"26","author":"Shinkai","year":"2018","journal-title":"J. Appl. Oral Sci."},{"key":"ref_25","first-page":"394","article-title":"The advantages of BioHPP polymer as superstructure material in oral implantology","volume":"53","author":"Bechir","year":"2016","journal-title":"Mater. Plast."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Abd El-Fattah, A., Youssef, H., Gepreel, M.A.H., Abbas, R., and Kandil, S. (2021). Surface Morphology and Mechanical Properties of Polyether Ether Ketone (PEEK) Nanocomposites Reinforced by Nano-Sized Silica (SiO2) for Prosthodontics and Restorative Dentistry. Polymers, 13.","DOI":"10.3390\/polym13173006"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"6531","DOI":"10.1007\/s10853-020-05716-x","article-title":"Improved performance of sulfonated poly ether ether ketone\/three-dimensional hierarchical molybdenum disulfide nanoflower composite proton exchange membrane for fuel cells","volume":"56","author":"Zhong","year":"2021","journal-title":"J. Mater. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"6721","DOI":"10.1007\/s10853-020-04479-9","article-title":"Nanocomposites based on graphene analogous materials and conducting polymers: A review","volume":"55","author":"Dunlop","year":"2020","journal-title":"J. Mater. Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"105173","DOI":"10.1016\/j.jmbbm.2022.105173","article-title":"Fracture load of different veneered and implant-supported 4-UNIT cantilever PEEK fixed dental prostheses","volume":"129","author":"Liebermann","year":"2022","journal-title":"J. Mech. Behav. Biomed. Mater."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"419","DOI":"10.1016\/j.dental.2013.01.002","article-title":"Mechanical properties of polymer-infiltrated-ceramic-network materials","volume":"29","author":"Coldea","year":"2013","journal-title":"Dent. Mater."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"7","DOI":"10.4012\/dmj.2013-345","article-title":"Three-unit reinforced polyetheretherketone composite FDPs: Influence of fabrication method on load-bearing capacity and failure types","volume":"34","author":"Stawarczyk","year":"2015","journal-title":"Dent. Mater. J."},{"key":"ref_32","first-page":"113","article-title":"PEEK High Performance Polymers: A Review of Properties and Clinical Applications in Prosthodontics and Restorative Dentistry","volume":"27","author":"Alexakou","year":"2019","journal-title":"Eur. J. Prosthodont. Restor. Dent."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"137","DOI":"10.2186\/jpr.JPOR_2019_404","article-title":"A potential application of materials based on a polymer and CAD\/CAM composite resins in prosthetic dentistry","volume":"65","year":"2021","journal-title":"J. Prosthodont. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1016\/j.jmbbm.2010.06.001","article-title":"Two-body wear of dental restorative materials","volume":"4","author":"Hahnel","year":"2011","journal-title":"J. Mech. Behav. Biomed. Mater."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1111\/j.1834-7819.2010.01296.x","article-title":"Resin composite restorative materials","volume":"56","author":"Ilie","year":"2011","journal-title":"Aust. Dent. J."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"L\u00fcmkemann, N., Eichberger, M., and Stawarczyk, B. (2017). Bonding to Different PEEK Compositions: The Impact of Dental Light Curing Units. Materials, 10.","DOI":"10.3390\/ma10010067"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"668","DOI":"10.4012\/dmj.2015-349","article-title":"Effect of surface pretreatments on resin composite bonding to PEEK","volume":"35","author":"Silthampitag","year":"2016","journal-title":"Dent. Mater. J."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"382","DOI":"10.1016\/j.msec.2017.04.151","article-title":"Effects of silane-modified fillers on properties of dental composite resin","volume":"79","year":"2017","journal-title":"Mater. Sci. Eng. C Mater. Biol. Appl."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"907","DOI":"10.1080\/00914037.2019.1631822","article-title":"The effectiveness of functionalized nano-hydroxyapatite filler on the physical and mechanical properties of novel dental restorative composite","volume":"69","author":"Yadav","year":"2019","journal-title":"Int. J. Polym. Mater. Polym. Biomater."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1016\/j.dental.2019.11.007","article-title":"Multifunctional monomer acts as co-initiator and crosslinker to provide autonomous strengthening with enhanced hydrolytic stability in dental adhesives","volume":"36","author":"Song","year":"2020","journal-title":"Dent. Mater."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"\u0160inkovec, R., and Mu\u0161i\u010d, B. (2020). Effect of Organosilane Coupling Agents on Thermal, Rheological and Mechanical Properties of Silicate-Filled Epoxy Molding Compound. Materials, 13.","DOI":"10.3390\/ma13010177"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Hermanson, G.T. (2013). Silane coupling agents. Bioconjugate Techniques, Academic Press. [3rd ed.].","DOI":"10.1016\/B978-0-12-382239-0.00013-3"},{"key":"ref_43","first-page":"541","article-title":"Silane Modified Fillers for Reinforcing Polymers","volume":"10","author":"Domka","year":"2002","journal-title":"Polym. Polym. Compos."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1002\/(SICI)1096-8644(200003)111:3<369::AID-AJPA6>3.0.CO;2-#","article-title":"Tooth wear and compensatory modification of the anterior dentoalveolar complex in humans","volume":"111","author":"Kaifu","year":"2000","journal-title":"Am. J. Phys. Anthropol."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1016\/j.dental.2021.12.009","article-title":"Methodology investigation: Impact of crown geometry, crown, abutment and antagonist material and thermal loading on the two-body wear of dental materials","volume":"38","author":"Schmeiser","year":"2022","journal-title":"Dent. Mater."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"124188","DOI":"10.1016\/j.matchemphys.2020.124188","article-title":"Analyses on mechanical and physical performances of nano-apatite grafted glass fibers based dental composites","volume":"263","author":"Siddiqui","year":"2021","journal-title":"Mater. Chem. Phys."},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Raszewski, Z., Kulbacka, J., Paku\u0142a, D., Brz\u0105kalski, D., and Przekop, R.E. (2023). Feldspar-Modified Methacrylic Composite for Fabrication of Prosthetic Teeth. Materials, 16.","DOI":"10.3390\/ma16103674"},{"key":"ref_48","unstructured":"(2020). Dentistry\u2014Polymer-based crown and veneering materials (Standard No. EN ISO 10477:2020)."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/18\/12\/2736\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:49:52Z","timestamp":1760032192000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/18\/12\/2736"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,6,11]]},"references-count":48,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2025,6]]}},"alternative-id":["ma18122736"],"URL":"https:\/\/doi.org\/10.3390\/ma18122736","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,6,11]]}}}