[Changes in shape of complete dentures in the mouth]

Area of Science:

• Dental Materials Science
• Prosthodontics
• Biomaterials Engineering

Context:

• Complete dentures are essential for restoring masticatory function and aesthetics.
• Material selection and fabrication methods influence denture performance and longevity.
• Understanding denture material dimensional stability under functional loading is crucial for clinical success.

Purpose:

• To evaluate and compare the dimensional stability of complete dentures fabricated from Paladon 65 and polymethyl methacrylate (PMMA) using the casting method.
• To quantify form changes in complete dentures over a 90-day period of clinical use.
• To assess the impact of masticatory load on denture dimensional accuracy.

Summary:

• Sixty patients participated in a 90-day study assessing complete denture form changes.
• Dentures made from Paladon 65 and PMMA (casting method) were monitored for dimensional stability.
• Results indicated slight transversal expansion (0.2-0.4%) in the tuberosity and anterior tooth regions under masticatory load, with no significant difference in form stability between the two materials.

Impact:

• Provides valuable data for dentists and dental technicians regarding the in-vivo performance of Paladon 65 and PMMA denture base materials.
• Informs material selection for complete dentures, suggesting comparable dimensional stability between Paladon 65 and PMMA under typical functional conditions.
• Contributes to the understanding of denture base material behavior, potentially influencing future material development and fabrication techniques.