ความต้านทานต่อการสึกของซี่ฟันปลอมอะคริลิก เรซินชนิดต่างๆ

• Main Author: ชนิตา ศุภอมรกุล
• Other Authors: แมนสรวง อักษรนุกิจ
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2007
• Subjects: ฟันปลอม > การสึกกร่อน; วัสดุ > การสึกกร่อน; เรซินอะคริลิก > การสึกกร่อน; Dentures > Erosion; Materials > Erosion; Acrylic resins > Erosion
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:21468
• Institution: Chulalongkorn University

The wear resistance of acrylic resin teeth is a key factor in determining the function and service life of the removable dental prosthesis. The ability of acrylic resin teeth to maintain a stable occlusal relationship over time relies upon this property. Therefore, the purpose of this study was to evaluate wear resistance of various acrylic resin teeth based on their composition when opposed by the same tooth antagonist. Four acrylic resin teeth (Major dent, SR-Orthosit-PE, Trubyte Bioform IPN and Excellence IPN) were evaluated using an in vitro 2 body wear- testing apparatus resembling pin on disc configuration. Wear testing was performed by repeatedly grinding upper acrylic resin tooth specimen (pin) on lower acrylic resin tooth specimen (disc) with 60 Hertz, 8 mm. grinding distance and 2 Kg. dead weight under flowing water. Wear resistance was assessed by volume loss after 5,000 cycles. The Vickers microhardness (VHN) of the specimens was also measured with a load of 50 g and a loading time of 30 seconds. Data were analyzed using a 1-way analysis of variance and Turkey HSD multiple comparison at p<0.05. The volume loss of Major dent teeth (0.0275 ± 0.004) was significant higher than the others. Regarding surface hardness, SR-Orthosit-PE (29.21 ± 0.74 VHN) has significantly higher hardness than other acrylic resin teeth (p<0.05).