Kakai Ribaz Tahsin
Dentistry, Kurdistan Higher Council of Medical Specialties, Erbil, IRQ.
Cureus. 2024 Dec 23;16(12):e76269. doi: 10.7759/cureus.76269. eCollection 2024 Dec.
Introduction The utilization of Computer-Aided Design and Computer-Aided Manufacturing (CAD/CAM) technology in the production of polyetheretherketone (PEEK) and acetal frameworks enhances the precision and stability of partial denture frameworks. This study evaluates the retentive forces of CAD/CAM-fabricated PEEK, acetal, and cobalt-chromium (Co-Cr) frameworks in removable partial dentures (RPDs). Methods Forty-five frameworks were fabricated (15 each of PEEK, acetal, and Co-Cr) and tested for retentive forces using a universal testing machine at a crosshead speed of 5 mm/min. The frameworks were divided into three groups: one with digitally milled PEEK, one with Co-Cr, and one with digitally milled acetal. Each partial denture clasp was designed using CAD/CAM software, extending between the central incisor and the second premolar. These clasps were specifically designed to aid in securing the framework during tensile testing and to facilitate the removal of cast clasps during later stages. Results PEEK frameworks demonstrated the highest retentive forces (mean: 3.52 ± 0.78 N, p < 0.001), followed by acetal (mean: 0.47 ± 0.02 N) and Co-Cr (mean: 0.32 ± 0.12 N). Conclusions PEEK outperformed other materials, making it a promising candidate for RPD frameworks.
引言 聚醚醚酮（PEEK）和乙缩醛基托在制作过程中采用计算机辅助设计与计算机辅助制造（CAD/CAM）技术，可提高局部义齿基托的精度和稳定性。本研究评估了CAD/CAM制作的PEEK、乙缩醛和钴铬（Co-Cr）基托在可摘局部义齿（RPD）中的固位力。方法 制作45个基托（PEEK、乙缩醛和Co-Cr各15个），使用万能试验机以5mm/min的十字头速度测试固位力。基托分为三组：一组为数字铣削的PEEK基托，一组为Co-Cr基托，一组为数字铣削的乙缩醛基托。每个局部义齿卡环均使用CAD/CAM软件设计，从中央前牙延伸至第二前磨牙。这些卡环专门设计用于在拉伸测试期间固定基托，并便于在后期去除铸造卡环。结果 PEEK基托显示出最高的固位力（平均值：3.52±0.78N，p<0.001），其次是乙缩醛（平均值：0.47±0.02N）和Co-Cr（平均值：0.32±0.12N）。结论 PEEK的性能优于其他材料，使其成为RPD基托的一个有前景的候选材料。
