{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T05:34:49Z","timestamp":1777008889270,"version":"3.51.4"},"reference-count":40,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T00:00:00Z","timestamp":1776816000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"crossref","award":["BG16RFPR002-1.014-0005"],"award-info":[{"award-number":["BG16RFPR002-1.014-0005"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Surface roughness and mechanical performance are critical determinants of the clinical behavior, hygiene, and longevity of denture base materials. This study investigated the influence of two extrusion temperatures\u2014280 \u00b0C and 300 \u00b0C\u2014on both the surface roughness and compressive strength of ThermoSens thermoplastic polymer specimens over a 7-day immersion period. Surface roughness was evaluated at baseline, 24 h, and 7 days using a contact profilometer, while compressive strength was measured after 7 days following ISO 604 guidelines. Samples processed at 300 \u00b0C exhibited a significantly greater reduction in surface roughness over time (28.3%) compared with those processed at 280 \u00b0C (18.3%). However, although specimens processed at 300 \u00b0C showed a greater percentage reduction, their absolute roughness values remained higher than those processed at 280 \u00b0C. Compression testing demonstrated higher strength and modulus values in the 300 \u00b0C group (91.6 \u00b1 1.8 MPa; 1887.9 \u00b1 42.3 MPa) compared to the 280 \u00b0C group (82.3 \u00b1 2.1 MPa; 1755.4 \u00b1 38.7 MPa). These findings indicate a trade-off between improved mechanical performance at higher processing temperatures and lower surface roughness at lower temperatures, highlighting the need for the careful optimization of processing conditions.<\/jats:p>","DOI":"10.3390\/polym18091010","type":"journal-article","created":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T09:01:24Z","timestamp":1776848484000},"page":"1010","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effect of Thermal Processing on Surface Roughness of Injection-Molded Denture Base Polymers"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4530-0026","authenticated-orcid":false,"given":"Bozhana","family":"Chuchulska","sequence":"first","affiliation":[{"name":"Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2444-2471","authenticated-orcid":false,"given":"Mariya","family":"Dimitrova","sequence":"additional","affiliation":[{"name":"Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9587-5114","authenticated-orcid":false,"given":"Boyan","family":"Dochev","sequence":"additional","affiliation":[{"name":"Department of Mechanics, Faculty of Mechanical Engineering, Technical University of Sofia, Branch Plovdiv, 4000 Plovdiv, Bulgaria"},{"name":"Center of Competence \u201cSmart Mechatronic, Eco-and Energy-Saving Systems and Technologies\u201d, 4000 Plovdiv, Bulgaria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-5502-7691","authenticated-orcid":false,"given":"Kliment","family":"Georgiev","sequence":"additional","affiliation":[{"name":"Department of Mechanical and Instrument Engineering, Faculty of Mechanical Engineering, Technical University of Sofia, Branch Plovdiv, 4000 Plovdiv, Bulgaria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3676","DOI":"10.5272\/jimab.2021272.3676","article-title":"Application of resilient denture lining materials: Literature review","volume":"27","author":"Yankova","year":"2021","journal-title":"J. IMAB"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3668","DOI":"10.5272\/jimab.2021272.3668","article-title":"Study of the knowledge and use of resilient denture lining materials in clinical practice","volume":"27","author":"Yankova","year":"2021","journal-title":"J. IMAB"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2781","DOI":"10.5272\/jimab.2019254.2781","article-title":"Modified approach to ensure a uniform layer of elastic material for relining complete dentures with self-curing silicones","volume":"25","author":"Yankova","year":"2019","journal-title":"J. IMAB"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"964","DOI":"10.5272\/jimab.2015214.964","article-title":"Presentation of a modified method of vestibuloplasty with an early prosthetic loading","volume":"21","author":"Konstantinova","year":"2015","journal-title":"J. IMAB"},{"key":"ref_5","first-page":"48","article-title":"Selective pressure impressions methods for total dentures by patients with loose and hypermobile mucosa on the alveolar ridges","volume":"11","author":"Hadjieva","year":"2005","journal-title":"J. IMAB"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"4335","DOI":"10.5272\/jimab.2022282.4335","article-title":"CAD\/CAM fiber-reinforced composite splint for immobilization of periodontally compromised teeth","volume":"28","author":"Zhekov","year":"2022","journal-title":"J. IMAB"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Sontea, V., and Tiginyanu, I. (2016). Antimicrobial reagents as functional finishing for textiles intended for biomedical applications. II. Metals and metallic compounds: Silver. Proceedings of the 3rd International Conference on Nanotechnologies and Biomedical Engineering, Chisinau, Republic of Moldova, 23\u201326 September 2015, Springer.","DOI":"10.1007\/978-981-287-736-9"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Hufenus, R., Yan, Y., Dauner, M., and Kikutani, T. (2020). Melt-spun fibers for textile applications. Materials, 13.","DOI":"10.3390\/ma13194298"},{"key":"ref_9","first-page":"179","article-title":"Imparting antimicrobial properties to polyester and polyamide fibers\u2014State of the art","volume":"78","author":"Shalaby","year":"2017","journal-title":"J. Text. Assoc."},{"key":"ref_10","first-page":"491","article-title":"Polyester nanocomposite fibers with antibacterial properties","volume":"2","author":"Teli","year":"2011","journal-title":"Adv. Appl. Sci. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"147","DOI":"10.3897\/folmed.62.e49799","article-title":"Application of soft relining materials in dental medicine\u2014Clinical results","volume":"62","author":"Hristov","year":"2020","journal-title":"Folia Medica"},{"key":"ref_12","unstructured":"NextDent (2025, February 12). NextDent Denture 3D+. Available online: https:\/\/nextdent.com\/products\/denture-3dplus\/."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1841","DOI":"10.1016\/j.dental.2022.09.006","article-title":"Assessing the physical and mechanical properties of 3D printed acrylic material for denture base application","volume":"38","author":"Altarazi","year":"2022","journal-title":"Dent. Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"160","DOI":"10.4047\/jap.2021.13.3.160","article-title":"Color stability of 3D-printed denture resins: Effect of aging, mechanical brushing and immersion in staining medium","volume":"13","author":"Alfouzan","year":"2021","journal-title":"J. Adv. Prosthodont."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Dimitrova, M., Vlahova, A., Kalachev, Y., Zlatev, S., Kazakova, R., and Capodiferro, S. (2023). Recent advances in 3D printing of polymers for application in prosthodontics. Polymers, 15.","DOI":"10.3390\/polym15234525"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Chuchulska, B., and Zlatev, S. (2021). Linear dimensional change and ultimate tensile strength of polyamide materials for denture bases. Polymers, 13.","DOI":"10.3390\/polym13193446"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"e360","DOI":"10.1016\/j.dental.2021.02.010","article-title":"Development of 3D printed resin reinforced with modified ZrO2 nanoparticles for long-term provisional dental restorations","volume":"37","author":"Aati","year":"2021","journal-title":"Dent. Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5633","DOI":"10.2147\/IJN.S120054","article-title":"Influence of incorporation of ZrO2 nanoparticles on the repair strength of polymethyl methacrylate denture bases","volume":"11","author":"Gad","year":"2016","journal-title":"Int. J. Nanomed."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Chuchulska, B., Hristov, I., Dochev, B., and Raychev, R. (2022). Changes in the surface texture of thermoplastic (monomer-free) dental materials due to some minor alterations in the laboratory protocol\u2014Preliminary study. Materials, 15.","DOI":"10.3390\/ma15196633"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Khan, A.A., Fareed, M.A., Alshehri, A.H., Aldegheishem, A., Alharthi, R., Saadaldin, S.A., and Zafar, M.S. (2022). Mechanical properties of the modified denture base materials and polymerization methods: A systematic review. Int. J. Mol. Sci., 23.","DOI":"10.3390\/ijms23105737"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Dimitrova, M. (2025). The Role of Digital Innovations in Shaping Contemporary Fixed Prosthodontics: A Narrative Review. Oral, 5.","DOI":"10.3390\/oral5040084"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Silva, M.D.D.D., Nunes, T.S.B.S., Viotto, H.E.D.C., Coelho, S.R.G., Souza, R.F., and Pero, A.C. (2023). Microbial Adhesion and Biofilm Formation by Candida albicans on 3D-Printed Denture Base Resins. PLoS ONE, 18.","DOI":"10.1371\/journal.pone.0292430"},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Dimitrova, M., Vlahova, A., Hristov, I., Kazakova, R., Chuchulska, B., Kazakov, S., Forte, M., Granberg, V., Barile, G., and Capodiferro, S. (2023). Evaluation of Water Sorption and Solubility of 3D-Printed, CAD\/CAM Milled, and PMMA Denture Base Materials Subjected to Artificial Aging. J. Compos. Sci., 7.","DOI":"10.3390\/jcs7080339"},{"key":"ref_24","first-page":"45","article-title":"Comparative study of polyamide-based prosthetic materials under different surface treatments","volume":"23","author":"Ivanova","year":"2019","journal-title":"Balk. J. Dent. Med."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Dimova-Gabrovska, M., Uzunov, T., Gusiyska, A., Shopova, D., Taneva, I., Gerdzhikov, I., and Rangelov, S. (2024). Exploring Flexural Strength Variation in Polymeric Materials for Provisional Fixed Prosthetic Structures: Comparative Analysis with and without Reinforcement through Laboratory Experimentation and Statistical Evaluation. Appl. Sci., 14.","DOI":"10.3390\/app14093923"},{"key":"ref_26","first-page":"203","article-title":"Techniques for polishing polyamide-based denture materials: A review","volume":"64","author":"Ristic","year":"2014","journal-title":"Int. Dent. J."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"104","DOI":"10.3897\/folmed.66.e118377","article-title":"A 3D Simulation Study of the Deformation, Tension, and Stress of 3D-Printed and Conventional Denture Base Materials after Immersion in Artificial Saliva","volume":"66","author":"Dimitrova","year":"2024","journal-title":"Folia Medica"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Chuchulska, B., Dimitrova, M., Vlahova, A., Hristov, I., Tomova, Z., and Kazakova, R. (2024). Comparative Analysis of the Mechanical Properties and Biocompatibility between CAD\/CAM and Conventional Polymers Applied in Prosthetic Dentistry. Polymers, 16.","DOI":"10.3390\/polym16070877"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"6497","DOI":"10.5272\/jimab.2025314.6497","article-title":"Maximum bite force in fixed preliminary prosthetics","volume":"31","author":"Rangelov","year":"2025","journal-title":"J. IMAB"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Ivanova, S., Tomova, Z., Vlahova, A., Stoeva, I.L., Vasileva, E., Uzunova, Y., Urumova, M., Tomov, D., and Chonin, A. (2026). Contemporary Use of Polymers in Dentistry: A Narrative Review. Polymers, 18.","DOI":"10.3390\/polym18010138"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1111\/jicd.12125","article-title":"Effect of surface roughness on the hydrophobicity of a denture-base acrylic resin and Candida albicans colonization","volume":"7","author":"Machado","year":"2016","journal-title":"J. Investig. Clin. Dent."},{"key":"ref_32","first-page":"82","article-title":"Neue Entwicklungen in der additiven und subtraktiven Fertigung Teamwork","volume":"23","author":"Schweiger","year":"2020","journal-title":"J. Cont. Dent. Educ."},{"key":"ref_33","first-page":"220","article-title":"The effect of denture cleansers on the surface roughness of heat-polymerized denture base resins polished by three different techniques","volume":"39","author":"Chatzivasileiou","year":"2026","journal-title":"Int. J. Prosthodont."},{"key":"ref_34","first-page":"1","article-title":"Surface characteristics and microbial adhesion in polymethylmethacrylate for denture base submitted to antimicrobial agents and cleaning agents: A systematic review","volume":"31","author":"Teixeira","year":"2023","journal-title":"Eur. J. Prosthodont. Restor. Dent."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1111\/jopr.13535","article-title":"Flexural properties and hardness of CAD-CAM denture base materials","volume":"32","author":"Fouda","year":"2022","journal-title":"J. Prosthodont."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"291","DOI":"10.4103\/jips.jips_335_17","article-title":"An in vitro study to evaluate and compare the surface roughness in heat-cured denture-based resin and injection-molded resin system as affected by two commercially available denture cleansers","volume":"18","author":"Tripathi","year":"2018","journal-title":"J. Indian Prosthodont. Soc."},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Szczesio-Wlodarczyk, A., Domarecka, M., Kopacz, K., Sokolowski, G., and Bociong, K. (2021). Evaluation of the properties of urethane dimethacrylate-based dental resins. Materials, 14.","DOI":"10.3390\/ma14112727"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"68","DOI":"10.1016\/j.jdent.2017.02.012","article-title":"Poly(methyl methacrylate) with TiO2 nanoparticles inclusion for stereolithographic complete denture manufacturing\u2014The future in dental care for elderly edentulous patients?","volume":"59","author":"Totu","year":"2017","journal-title":"J. Dent."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Tzanakakis, E.G., Pandoleon, P., Sarafianou, A., and Kontonasaki, E. (2023). Adhesion of conventional, 3D-printed and milled artificial teeth to resin substrates for complete dentures: A narrative review. Polymers, 15.","DOI":"10.3390\/polym15112488"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Le Bars, P., Kouadio, A.A., Amouriq, Y., Bodic, F., Blery, P., and Bandiaky, O.N. (2024). Different polymers for the base of removable dentures? Part II: A narrative review of the dynamics of microbial plaque formation on dentures. Polymers, 16.","DOI":"10.3390\/polym16010040"}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/18\/9\/1010\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T04:35:33Z","timestamp":1777005333000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/18\/9\/1010"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,22]]},"references-count":40,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2026,5]]}},"alternative-id":["polym18091010"],"URL":"https:\/\/doi.org\/10.3390\/polym18091010","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,4,22]]}}}