What is the potential challenge for using Zr and Ti as bone implant?5 answersThe potential challenge for using Zirconium (Zr) and Titanium (Ti) as bone implants lies in the mechanical mismatch between human bone and the implant material, leading to issues like stress shielding and premature implant failures. To address this challenge, researchers have explored the development of novel Ti-Zr alloys with graded porosity and composition to enhance mechanical properties and biocompatibility for improved bone repair. Studies have shown that the addition of Zr and Molybdenum (Mo) to Ti alloys can improve mechanical properties, corrosion resistance, and cytocompatibility, with Ti-12Mo-10Zr alloy demonstrating promising potential for bone repair due to its excellent material and biological performance. Additionally, the systematic compositional dependence of apatite formation on Ti-Zr alloys has been investigated to enhance bone-bonding abilities, highlighting the importance of alloy composition in addressing challenges associated with using Zr and Ti for bone implants.
What is the success rate of zirconia dental implants?3 answersThe success rate of zirconia dental implants varies across the studies. One study reported an overall success rate of 89.6% after 8 years of follow-up. Another study found a cumulative success rate of 98.1% after 3 years. A pilot study in the Indian population reported a survival rate of 80% after 1 year. A retrospective study showed a cumulative prosthetic success rate of 91.9% after an average follow-up of 7.2 years. A retrospective study comparing immediate and delayed placement of zirconia implants reported a cumulative survival rate of 92% with 88% classified as full success. Overall, zirconia dental implants have shown favorable success rates in various studies, but long-term studies are still needed to further validate these findings.
What is the clinical outcomes of zirconium-titanium implants in single crown?4 answersZirconium-titanium implants used for single crowns have shown promising clinical outcomes. A systematic review and meta-analysis found that titanium-zirconium alloy, narrow-diameter implants (Ti-Zr NDIs) had high survival rates (97.5%) and success rates (97.2%) over a maximum follow-up period of 36 months, with no difference compared to commercial pure titanium (cpTi) implants. Another study comparing zirconia and titanium abutments in implant-supported restorations found that zirconia abutments achieved better aesthetic outcomes, although the clinical behavior was similar between the two materials. A quantitative assessment of randomized controlled trials showed that zirconium implants may have lower survival rates and significantly lower success rates compared to titanium implants, but there were no differences in terms of marginal bone loss and other peri-implant indices. A study evaluating CAD/CAM implant-supported monolithic zirconia single crowns cemented onto titanium abutments reported 100% survival and success rates after 6 years of use. A pilot study on zirconia implants in diverse clinical scenarios showed a survival rate of 80% and a mean marginal bone loss of 0.73mm after one year.
What is potential application of zirconium oxide nano particles?5 answersZirconium oxide (ZrO2) nanoparticles have potential applications in various fields. In the construction industry, nano-ZrO2 particles can be used for photocatalytic degradation of dyes and organic pollutants in cementitious materials. In the automotive, aerospace, and marine industries, copper matrix composites reinforced with nano-ZrO2 particles can enhance the mechanical properties of materials. Nano-ZrO2 materials also have excellent dielectric properties, making them suitable for applications in 5G communication, consumer electronics, and millimeter wave frequency bands. In the field of water treatment, ZrO2 nanoparticles and their nano-heterostructures with graphene have shown enhanced photocatalytic activity for the degradation of organic pollutants. In dentistry, nano-ZrO2 powders have been used in dental ceramics, implants, radio pacifying agents, and tissue engineering due to their improved mechanical characteristics and biocompatibility.
What are the advantages and disadvantages of zirconia healing abutments?5 answersZirconia healing abutments offer several advantages and disadvantages. One advantage is their biocompatible nature and advantageous mechanical characteristics, making them effective in restorative therapy. Zirconia abutments also provide good esthetic integration in terms of restorations and soft-tissue color. However, there are some disadvantages to consider. The mechanical stability of zirconia abutments has been verified for a period no longer than 5 years, so long-term clinical observation is needed. Zirconia abutments may lead to an increased brightness of the peri-implant mucosa compared to natural teeth, which can affect esthetics. Despite these disadvantages, zirconia abutments have demonstrated excellent technical and biological results over 10-11 years of function, with most patients being extremely satisfied with the aesthetics and function of their restorations.
How do the properties of zirconium dioxide (ZrO2) compare to other materials?5 answersZirconium dioxide (ZrO2) has several advantageous properties compared to other materials. It has a high dielectric constant and thermodynamic stability, making it a suitable replacement for traditional silicon dioxide in dielectric applications. ZrO2 nanoparticles can strengthen thermoplastics used in additive manufacturing, resulting in improved mechanical behavior. In denture base resins, the addition of ZrO2 nanoparticles at low concentrations does not significantly affect translucency, making them suitable for clinical applications. In GaN/InGaN light-emitting diodes (LEDs), the use of ZrO2 as a current blocking layer and surface passivation layer enhances current spreading and suppresses surface leakage, leading to improved light output power and efficiency. ZrO2 also exhibits good color stability, chemical stability, aesthetics, biocompatibility, and durability, making it suitable for dental structures and biological implants.