Effect of various polishing systems on the surface roughness and phase transformation of zirconia and the durability of the polishing systems.

Statement Of Problem: Although many systems are used to polish zirconia, a comparison of the performance of zirconia and feldspathic porcelain polishing systems is lacking.

Purpose: The purpose of this in vitro study was to compare the effects of 3 polishing systems on surface roughness, zirconia phase transformation, and durability of the polishing systems when applied to zirconia and feldspathic porcelain.

Material And Methods: Three polishing systems were evaluated: Z1, a zirconia polishing system; Z2, a zirconia polishing system, and F1, a feldspathic porcelain polishing system.

Analysis of Removal Torque of Injection Molded Zirconia Implants; An Experimental Study on Beagles.

This study compared the removal torque between injection molded zirconia implants and titanium implants with resorbable blast media (RBM) surfaces in beagle humeri. Fifteen screw-shaped implants were classified into 3 groups; titanium implant with RBM surface (Group RT), injection molded zirconia implant (Group Zr) and injection molded zirconia implant with sand-blasted surface (Group ZrS). Implants were inserted into beagle humeri.

Titanium dioxide nanotube modified implants: an animal study on bone formation.

This study examined the bone response to titanium dioxide nanotube modified implants. A total of 24 implants were placed in the femur of 4 beagles. Before placement, screw-shaped implants were classified into 3 groups; machined surface (group M), titanium dioxide nanotube modification of the machined surface (group MN) and titanium dioxide nanotube modification of the RBM surface (group RN).

Effect of surface treatment on bond strength of Ti-10Ta-10Nb to low-fusing porcelain.

Statement Of Problem: Ti-10Ta-10Nb alloy is a promising alloy for metal ceramic crowns because of its good corrosion resistance and low cytotoxicity. However, more information is needed on the bond strength between this alloy and porcelain.

Purpose: The purpose of this study was to compare the surface morphology, surface roughness, and bond strength of a Ti-10Ta-10Nb alloy, pure Ti, and a Ti-6Al-4V alloy.

Surface characteristics and osteoblastic cell response of alkali-and heat-treated titanium-8tantalum-3niobium alloy.

Purpose: The aim of the present study was to evaluate the biological response of alkali- and heat-treated titanium-8tantalum-3niobium surfaces by cell proliferation and alkaline phosphatase (ALP) activity analysis.

Methods: Commercial pure titanium (group cp-Ti) and alkali- and heat-treated titanium-8tantalum-3niobium (group AHT) disks were prepared. The surface properties were evaluated using scanning electron microscopy, energy dispersed spectroscopy and X-ray photoelectron spectroscopy (XPS).

Effect of zirconia surface treatments on the shear bond strength of veneering ceramic.

Statement Of Problem: Various surface treatments of zirconia have been recommended for veneering ceramics. However, it has not been determined which of these treatments produces the highest bond strength.

Purpose: This study examined the effects of various surface treatments on the shear bond strength of zirconia and veneering ceramic.

Response of fetal rat calvarial cells to nanotubular titanium oxide surface.

This study examined the cell response to a TiO2 nanotubular surface (Ti-NT) for future biomedical applications. The level of cell attachment and spreading at 20 min and 60 min was evaluated by SEM. IL-6 and PGE2 secretion was evaluated by ELISA.

Shear bond strength and failure types of polymethyl methacrylate denture base resin and titanium treated with surface conditioner.

This study compared the shear bond strength and failure types of a polymethyl methacrylate (PMMA) denture base resin to commercially pure (CP) titanium, Ti-6Al-4V alloy, and cobalt-chromium alloy using a metal surface conditioner. The PMMA denture base resin (5 x 5 x 5 mm(3)) was cured onto disks, 10 mm in diameter and 2.5-mm thick.

Histologic evaluation and removal torque analysis of nano- and microtreated titanium implants in the dogs.

Statement Of Problem: A number of studies about the nano-treated surfaces of implants have been conducting along with micro-treated surfaces of implants.

Purpose: The purpose of this study was to get information for the clinical use of nano-treated surfaces compared with micro-treated surfaces by measuring removal torque and analyzing histological characteristics after the placement of various surface-treated implants on femurs of dogs.

Material And Methods: Machined surface implants were used as a control group.

Shear bond strength of composite resin to titanium according to various surface treatments.

Statement Of Problem: When veneering composite resin-metal restoration is prepared, the fact that bond strength between Ti and composite resin is relatively weak should be considered.

Purpose: The purpose of this study is to evaluate the shear bond strength between the veneering composite resin and commercial pure (CP) Ti / Ti-6Al-4V alloy according to the method of surface treatment.

Material And Methods: The disks were cast by two types of metal.

Cell response to a newly developed Ti-10Ta-10Nb alloy and its sputtered nanoscale coating.

Statement Of Problem: The success of titanium implants is due to osseointegration or the direct contact of the implant surface and bone without a fibrous connective tissue interface.

Purpose: The purpose of this study was to evaluate the osteoblast precursor response to titanium - 10 tantalum - 10 niobium (Ti-Ta-Nb) alloy and its sputtered coating.

Material And Methods: Ti-Ta-Nb coatings were sputtered onto the Ti-Ta-Nb disks.

Comparion of stability in titanium implants with different surface topographies in dogs.

Statement Of Problem: A few of studies which compared and continuously measured the stability of various surface treated implants in the same individual had been performed.

Purpose: We aim to find the clinical significance of surface treatments by observing the differences in the stabilization stages of implant stability.

Material And Methods: Eight different surface topographies of dental implants were especially designed for the present study.

Effect of adhesive primers on bonding strength of heat cure denture base resin to cast titanium and cobalt-chromium alloy.

Statement Of Problem: The poor chemical bonding of a denture base resin to cast titanium framework often introduces adhesive failure and increases microleakage.

Purpose: This study evaluated the shear bond strengths of a heat cure denture base resin to commercially pure titanium, Ti-6Al-4V alloy and a cobalt-chromium alloy using two adhesive primers.

Material And Methods: Disks of commercially pure titanium, Ti-6Al-4V alloy and a cobalt-chromium alloy were cast.

Oral rehabilitation for a patient with oligodontia and maxillary hypoplasia.

An 18 year old female with oligodontia and maxillary hypoplasia was treated using an interdisciplinary team approach involving orthodontists, maxillofacial surgeons and prosthodontists. Full mouth one-piece fixed partial dentures were the final restoration. The fixed partial dentures fabricated for the maxilla and mandible using the concept of a shortened dental arch resulted in improved esthetics and the masticatory function.

Effects of acupuncture on c-Fos expression in brain after noxious tooth stimulation of the rat.

Clinically, acupuncture therapy is useful for the control of acute or chronic pain. This study was designed to elucidate the antinociceptive mechanism of acupuncture and the mechanisms underlying cardiovascular reflex elicited by toothache. Expression of c-Fos, a neuronal activation marker, and the phenylethanalamine-N-methyltransferase (PNMT) were examined 1.