## 1 Introduction  
Polymethyl methacrylate (PMMA) holds numerous advantageous attributes, positioning it as the most pertinent material for the fabrication of removable prostheses [1]. Nevertheless, certain drawbacks are associated with its suboptimal surface characteristics [2]. The attainment of polished surfaces for denture bases is imperative to mitigating microbial adhesion and unsightly discolorations, aligning with esthetic requirements [3, 4, 5, 6]. Additionally, denture base resins possessing abrasion resistance provide the dentures with a robustness that can withstand mechanical brushing and the consumption of hard foods [7]. In contrast, denture base materials exhibiting limited abrasion resistance might result in heightened surface roughness, the propagation of cracks within deep scratches, and potential dimensional alterations [8]. Consequently, the incorporation of denture base resins featuring commendable surface attributes contributes to the durability of dentures while addressing aesthetic considerations, even in the context of advancing digital technologies for crafting removable prostheses. Methacrylate polymers have gained substantial popularity within dentistry as denture base materials due to their several advantages [9]. Polymethyl methacrylate base materials offer numerous advantages in dental applications, including easy processing, favorable aesthetics, resistance to chemical degradation, and cost-effectiveness. Additionally, a significant advantage of PMMA base materials is their excellent bonding to denture teeth, which ensures a secure fit and enhances the durability of the denture [10]. Moreover, PMMA allows for easy repair and reline procedures, enabling clinicians to quickly address any issues that may arise during the lifespan of the denture, thereby minimizing patient inconvenience and maximizing longevity. This ease of repair and reline contributes to the overall cost-effectiveness of PMMA-based dentures, making them a preferred choice for both patients and dental professionals [11]. Various methods have been employed for denture base fabrication. Heat activation, involving heat injection techniques and polymerization using a water bath or microwave oven, has been used [12]. Polymethyl methacrylate denture base material was typically supplied in powder and liquid forms [13]. A recent innovation in denture base materials is the VertexTM ThermoSens thermoplastic material, which employs thermal energy for curing [14]. \"Thermoplastic\" refers to polymers that soften when heated and solidify upon cooling [15]. These polymers, composed of linear and/or branched chains, exhibit molecular movement beyond their glass transition temperature, allowing for molding and shaping while softening [16; 17]. Upon cooling, they retain their formed shape. Reheating enables reshaping due to the reversible setting reaction, owing to weak bonds between molecular chains. The hardness of thermoplastic polymers indicates their abrasion resistance and surface strength [18; 19]. Lower hardness levels increase susceptibility to scratches, surface damage, and potential dimensional changes from mechanical brushing or chewing hard foods [20]. Flexible denture base materials are conveniently packaged in cartridges of various sizes [21]. These thermoplastic materials are typically polyacetal or polyamide-nylon, specifically belonging to the super polyamide category within the nylon family. Nylon, derived from dicarboxylic acid, amino acid, diamine, and lactams, is the foundation for these resins. The fabrication of flexible denture base prostheses relies on the injection molding technique [22]. The Vertex ThermoSens stands as an innovative, virtually unbreakable, rigid thermoplastic denture base material, devoid of monomers [23; 24; 25]. It is designed for use in complete or partial denture bases, bridge constructions, and temporary crowns. Comprising microcrystalline polyamide material with pigments, it becomes a suitable option for patients with monomer allergies [26; 27].