the Clinical Performance of Indirect Restoration Fabricated From Nanohybrid Cad Cam Composite Blocks and Ceramic Blocks Clinical Trial
Official title:
One-year Clinical Assessment of Indirect Restorations Fabricated From Nano Hybrid Composite Blocks Versus Ceramic Blocks in Badly Broken Teeth (Randomized Clinical Trial)
comparing nano hybrid composite blocks grandio blocks (VOCO) with ceramic blocks (Emax) in indirect restorations using modified USPH criteria (marginal integrity) to see if there will be a significant different between two blocks
Ceramic restorations are well - thought- out an excellent option to restore posterior teeth
were esthetics is required and the size of the cavity preparation has surpassed the
conventional for direct resin composites , Ceramic systems can syndicate esthetics with wear
resistance , being considered a consistent treatment of choice ,peutzfeld evaluated , the
failure rate of different restorative materials used in posterior teeth and stated that gold
inlays didnt present a much lower failure rate than ceramic or composite inlays, consequently
, the author suggested that other aspects besides longevity , such as esthetics , charge and
number of visits should also be considered when relating treatment options
Different ceramic systems for constructing inlays and onlays restorations are available in
the market, some of the ceramic restorations are made using feldspathic ceramic , the Cerec
computer aided design/computer -aided manufacturing, CAD/CAM system or the hot-pressed
leucite -reinforced ceramic fabricated by the conventional lost wax technique , other systems
that employ alumina are available , there are three types of materials available for the
dentist (glass ceramics /ceramics)resin hybrid ceramics and composite blocks Advantages of
ceramic restortations are improved because of their increased translucency and light
transmission ,Another advantage embraces minimal tooth reduction compared with metal ceramics
, minimal thermal conductivity , they have desirable properties including their physical and
mechanical properties , outstanding biocompatbility to periodontal tissues and less
susceptibility to metal allergies though ceramic blocks will cause wear of opposing natural
teeth ,expensive , that's why we have to shift to another material resin composite Resin
composite materials have been quickly developed in the last few years , direct resin
composite restorations become the gold standard for restoring intra coronal cavities , while
for the extra coronal cavities , the indirect resin composite onlays be inclined to replace
metallic restorations in most situations being more esthetics and conservative with lower
cost.
One of the break throughs in resin composite technology is the evolution of the new resin
composite blocks (Grandio blocks ) merits of grandio blocks the highest fillers content ( 86%
by weight)resembles natural teeth perfectly , excellent physical values for flexural strength
and abrasion , no firing required (a real one step), can be processed using any conventional
milling unit , can be polished and repaired optimally , Ideal for grinding even incases with
thin edges and its based on the nano hybrid technology .
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