Tah Rajdeep, Chidambaranathan Ahila Singaravel, Balasubramanium Muthu Kumar, Sundaram Saravanan Meenakshi
Department of Prosthodontics, SRM Dental College, Ramapuram, Chennai, Tamil Nadu, India.
Adv Biomed Res. 2021 Oct 27;10:31. doi: 10.4103/abr.abr_132_20. eCollection 2021.
Dental ceramics exhibit good optical and esthetic properties due to their translucency. Feldspathic ceramic is the most widely used veneering ceramic with brittleness, which accounts for most of its failure. Hence, this study was done to evaluate and compare the flexural strength of feldspathic ceramic reinforced with zirconia-silica nanofibers in the ratio of 2.5, 5, and 7.5 wt% with conventional feldspathic ceramic.
According to ISO 6872, a master die was prepared from which resin bars were fabricated with 4.0 mm in width × 1.2 mm thickness × 25.0 mm length, Zirconia-silica nanofibers were produced by sol-gel electrospinning go around with calcination and blended with feldspathic ceramic through ball milling method. The samples were prepared with 0, 2.5, 5, 7.5 wt% nanofibers reinforced ceramic. The flexural strength of the samples was evaluated using three-point bending test.
The flexural strength values of zirconia-silica nanofibers reinforced ceramic groups were higher than control group. There was a gradual increase in the flexural strength values of felspathic ceramic groups with increase in wt% of nanofibers.
The flexural strength of feldspathic ceramic samples reinforced with zirconia-silica nanofibers by 5 and 7.5 wt% were statistically significant compared to control, whereas the flexural strength of 2.5 wt% was statistically insignificant compared to the control group.
牙科陶瓷因其半透明性而具有良好的光学和美学性能。长石质陶瓷是应用最广泛的饰面陶瓷，但具有脆性，这也是其失效的主要原因。因此，本研究旨在评估和比较氧化锆 - 二氧化硅纳米纤维以2.5 wt%、5 wt%和7.5 wt%比例增强的长石质陶瓷与传统长石质陶瓷的抗弯强度。
根据ISO 6872标准制备母模，从中制作宽度为4.0 mm×厚度为1.2 mm×长度为25.0 mm的树脂棒。通过溶胶 - 凝胶电纺丝法制备氧化锆 - 二氧化硅纳米纤维，经煅烧处理后通过球磨法与长石质陶瓷混合。制备含0 wt%、2.5 wt%、5 wt%、7.5 wt%纳米纤维增强陶瓷的样品。采用三点弯曲试验评估样品的抗弯强度。
氧化锆 - 二氧化硅纳米纤维增强陶瓷组的抗弯强度值高于对照组。随着纳米纤维wt%的增加，长石质陶瓷组的抗弯强度值逐渐升高。
与对照组相比，5 wt%和7.5 wt%氧化锆 - 二氧化硅纳米纤维增强的长石质陶瓷样品的抗弯强度具有统计学意义，而2.5 wt%增强组与对照组相比抗弯强度无统计学意义。
