Evaluation of surface roughness and wear resistance of two new Hybrid Ceramic materials
Hisham Abdel Aziz El Mughawry;
Abstract
Esthetics has become a matter of necessary concern to the dentist. Changing trends and treatments for dental disease have made it necessary to diversify dental service.
Composite resins are among the most frequently used dental materials for aesthetic restorations in dental practices due to their abilities to bond to enamel and dentine, resemblance to tooth structures in color and mechanical properties, ease of chair-side applications and relatively low costs. Ideally,the surface of esthetic dental materials should not be affected by the polymerization mechanism or any aging procedures. However, significantchanges have been reported in several studies of resin composites which show that these direct restorations have low resistance to wear, discoloration and fractures.
Dental ceramics are considered chemically inert restorative materials. However, many factors such as the composition, microstructure, chemical properties of the ceramic materials, erosive or acidic agents, exposure time, and the temperature,mastication forces may influence the durability of dental ceramics.
Due to the continuous search for a betterquality and properties in the field of dentalCAD-CAM ceramics the new innovative hybrid ceramics now introduced to the market.
The clinical performance of the new hybrid ceramics still unknown,so in this study the surface roughness and wear resistance of nano hybrid ceramics Lava ultimate and polymer infiltrated ceramics VitaEnamic in comparison to awell knownIPSe.maxCAD.
The new hybrid ceramic material was subjected to chemical erosion and mechanical abrasion then the weight loss and surface topography was evaluated for any changes.
After 168 and 336 hours of immersion in the acidic solution (citrate buffer ph 4.99) samples from each material were weighted and difference in weight calculated before and after immersion.
Results of chemical erosion showed that Lava ultimate has highest weight loss,followed by VitaEnamic and IPS e. max cad showed lowest amount of weight loss, which indicated that lava ultimate was the lowest resistance while IPS e.max was the highest resistance to erosive wear.
The results were confirmed by SEM that showed Lava ultimate having more porosities while VitaEnamic and IPS e.max showed less amount.
Results of mechanical abrasion showed that lava ultimate was the highest resistance followed by VitaEnamic then IPS e.max showed roughest surface.
Composite resins are among the most frequently used dental materials for aesthetic restorations in dental practices due to their abilities to bond to enamel and dentine, resemblance to tooth structures in color and mechanical properties, ease of chair-side applications and relatively low costs. Ideally,the surface of esthetic dental materials should not be affected by the polymerization mechanism or any aging procedures. However, significantchanges have been reported in several studies of resin composites which show that these direct restorations have low resistance to wear, discoloration and fractures.
Dental ceramics are considered chemically inert restorative materials. However, many factors such as the composition, microstructure, chemical properties of the ceramic materials, erosive or acidic agents, exposure time, and the temperature,mastication forces may influence the durability of dental ceramics.
Due to the continuous search for a betterquality and properties in the field of dentalCAD-CAM ceramics the new innovative hybrid ceramics now introduced to the market.
The clinical performance of the new hybrid ceramics still unknown,so in this study the surface roughness and wear resistance of nano hybrid ceramics Lava ultimate and polymer infiltrated ceramics VitaEnamic in comparison to awell knownIPSe.maxCAD.
The new hybrid ceramic material was subjected to chemical erosion and mechanical abrasion then the weight loss and surface topography was evaluated for any changes.
After 168 and 336 hours of immersion in the acidic solution (citrate buffer ph 4.99) samples from each material were weighted and difference in weight calculated before and after immersion.
Results of chemical erosion showed that Lava ultimate has highest weight loss,followed by VitaEnamic and IPS e. max cad showed lowest amount of weight loss, which indicated that lava ultimate was the lowest resistance while IPS e.max was the highest resistance to erosive wear.
The results were confirmed by SEM that showed Lava ultimate having more porosities while VitaEnamic and IPS e.max showed less amount.
Results of mechanical abrasion showed that lava ultimate was the highest resistance followed by VitaEnamic then IPS e.max showed roughest surface.
Other data
| Title | Evaluation of surface roughness and wear resistance of two new Hybrid Ceramic materials | Other Titles | تقييم خشونة السطح ومقاومة التأكل لمادتين حديثتين من السيراميك الهجين | Authors | Hisham Abdel Aziz El Mughawry | Issue Date | 2017 |
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