Mathew, M.Shenoy, K.Ravishankar, K.2026-02-052018Journal of Indian Prosthodontic Society, 2018, 18, 3, pp. 257-2629724052https://doi.org/10.4103/jips.jips-295-17https://idr.nitk.ac.in/handle/123456789/25086Objectives: The present study aimed to evaluate flexural strength of hydrogen plasma-treated polypropylene fibers-reinforced polymethyl methacrylate (PMMA) polymer composite. Materials and Methods: One control group with no fiber reinforcement and 9 polymer composite test groups with varying fiber weight percentage (2.5, 5, and 10 Wt%) and aspect ratio (3/220, 6/220, and 12 mm/220 ?m) were prepared. Flexural strength was measured using Instron. Results: All hydrogen plasma-treated polypropylene fiber-reinforced test groups obtained significantly higher flexural strength characteristics. Among the test groups, 6 mm long fibers reinforced in 10 Wt% showed superior flexural strength. Conclusion: Hydrogen plasma treatment on polypropylene fiber has a significant role in enhancing the adhesion between PMMA polymer matrix and the polypropylene fibers and thereby the flexural strength. © 2018 The Journal of Indian Prosthodontic Society | Published by Wolters Kluwer - Medknow.Flexural Strengthhydrogen plasma treatmentpolymethyl methacrylatepolypropylene fiber