Carious Tooth Clinical Trial
Official title:
One Year Clinical Evaluation of Milled BioHPP Polyetheretherketone (PEEK) Versus Zirconia Veneered Single Crowns (Randomized Controlled Clinical Trial-one-year Evaluation).
All ceramic crowns are indicated in case of mild to moderate discoloration, restoration of
traumatized or fractured teeth and abnormal tooth anatomy. Long term success of all ceramic
crowns is affected by many factors. Fracture of the all ceramic crowns is the most repeated
failure pattern and represents about 67% of total failures associated with this type of
restoration through a period of 15 years of clinical performance.
Polyetheretherketone (PEEK) is a polymer that has many potentials uses in dentistry.
Polyetheretherketone (PEEK) can be used to support fixed dental prostheses. However,
information about physio mechanical characterization is still scarce.
Polyetheretherketone (PEEK) is a synthetic, tooth colored polymeric material that has been
used as a biomaterial in orthopedics for many years due to its lower Young's (elastic)
modulus (3-4 GPa) being close to human bone. PEEK can be modified easily by incorporation of
other materials. For example; incorporation of carbon fibers or glass fibers can increase the
elastic modulus up to 18 GPa which becomes comparable to those of cortical bone and dentin so
the polymer could exhibit good stress distribution . Moreover, tensile properties of PEEK are
also analogous to those of bone, enamel and dentin making it a suitable restorative material
as far as the mechanical properties are concerned.
BioHPP PEEK is 20% ceramic reinforced, semicrystalline, thermoplastic and radiolucent polymer
for extreme durability especially for frameworks for fixed and removable dental prostheses.
It has many advantages as low density, light weight, shock absorber, biocompatible and
venerable with composite resin.
BioHPP PEEK can be fabricated via CAD/CAM technology by milling PEEK blanks. It is also can
be pressed by using granular or pellet-shaped PEEK. Three-unit PEEK fixed partial denture
manufactured via CAD-CAM has been suggested to have a higher fracture resistance than pressed
granular- or pellet-shaped PEEK dentures.
The fracture resistance of the CAD/CAM milled PEEK fixed dentures is much higher than those
of lithium disilicate glass-ceramic (950N), alumina (851N) , zirconia (981-1331N). The
abrasive properties of PEEK are excellent. Despite of significantly low elastic moduli and
hardness, abrasive resistance of PEEK is competitive with metallic alloys .
BioHPP PEEK can be used under resin composite as a coping material. Because the mechanical
properties of PEEK are similar to those of dentin and enamel, PEEK could have an advantage
over alloy and ceramic restorations . A variety of procedures have been suggested to
condition the surface of PEEK in order to facilitate its bonding with resin composite crowns.
For example, air abrasion with and without silica coating creates a more wettable surface.
Etching with sulphuric acid creates a rough and chemically altered surface which enables it
to bond more effectively with hydrophobic resin composites .
Due to these unique physical and mechanical properties, BioHPP PEEK is a promising material
for dental application and it has been proposed for other prosthodontic applications such as
fixed prostheses and removable prostheses .
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| Status | Clinical Trial | Phase | |
|---|---|---|---|
| Recruiting |
NCT05431465 -
Wear of Vita Ambria Only Restoration Compared With IPS Emax Onlay Restoration
|
N/A |