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Displaying 26 - 45 of 45

Dental Composites Based on Hybrid and Surface-Modified Amorphous Calcium Phosphates

April 1, 2004

Author(s)

Drago Skrtic, Joseph M. Antonucci, E D. Eanes, Naomi Eidelman

The objectives of this study were to examine the feasibility of preparing hybrid and surface-modified amorphous calcium phosphates (ACP) as fillers for mineral-releasing dental composites and determine whether the mechanical strength of the composites

Effect of Chemical Structure and Composition of the Resin Phase on Mechanical Strength and Vinyl Conversion of Amorphous Calcium Phosphate-Based Composites

March 1, 2004

Author(s)

Drago Skrtic, Joseph M. Antonucci, Walter G. McDonough, D W. Liu

The mechanical properties of recently developed bioactive, anti-demineralizaing/remineralizing, amorphous calcium phosphate (ACP)-based composites are in need of improvment. The objective of this study was to elucidate the effect of structure and

Urethane Methacrylate Resin Based Amorphous Calcium Phosphate Composites

October 22, 2003

Author(s)

W F. Regnault, Drago Skrtic, Joseph M. Antonucci

This study investigates the mechanical and ion-release properties of potentially bioactive amorphous calcium phosphate composites derived from three types of urethane dimethacrylate resins. Both the biaxial flexure strength, especially after immersion in

Effect of Bifunctional Comonomers on Mechanical Strength and Water Sorption of Amorphous Calcium Phosphate- and Silanized Glass-filled Bis-GMA-Based Composites

August 1, 2003

Author(s)

Drago Skrtic, Joseph M. Antonucci

This study seeks to elucidate structure-property relationships in a series of unfilled dental copolymers and their composites. The copolymers/composites were derived from photo-activated binary monomer systems based on 2,2-bis[p-2 -hydroxy-3

Amorphous Calcium Phosphate-Based Bioactive Polymeric Composites for Mineralized Tissue Regeneration

June 1, 2003

Author(s)

Drago Skrtic, Joseph M. Antonucci, E D. Eanes

Amorphous calcium phosphate (ACP), a postulated precursor in the formation of biological hydroxyapatite, has been evaluated as a filler phase in bioactive polymeric composites that utilize dental monomers to form the matrix phase on polymerization. In

Volumetric Contraction and Methacrylate Conversion in Photo-polymerized Amorphous Calcium Phosphate/Methacrylate Composites

June 1, 2003

Author(s)

Drago Skrtic, J W. Stansbury, Joseph M. Antonucci

Because of its relatively high solubility in aqueous media and its rapid transformation to hydroxyapatite, amorphous calcium phosphate (ACP) has been utilized as the filler phase of resin-based bioactive composites that have remineralization potential. The

Effect of Acidic Comonomers on Methacrylate Conversion and Mechancial Strength of Bioreactive Composites Based on Amorphous Calcium Phosphate

January 1, 2003

Author(s)

Joseph M. Antonucci, Walter G. McDonough, D W. Liu, Drago Skrtic

Effect of Acidic Comonomers on Methacrylate Conversion and Mechanical Strength of Bioactive Composites Based on Amorphous Calcium Phosphate

January 1, 2003

Author(s)

Joseph M. Antonucci, Walter G. McDonough, Da-Wei Liu, Drago Skrtic

Prior research utilizing a monomer system consisting of the dental monomers Bis-GMA and TEGDMA at equal masse levels with neutral, hydrophilic monomers indicated that, generally, the ternary monomer enhanced the degree of methacrylate conversion (DC) but

Volumetric Contraction and Methacrylate Conversion in Photopolymerized Amorphous Calcium Phosphate/Methacrylate Composites

January 1, 2003

Author(s)

Drago Skrtic, J W. Stansbury, Joseph M. Antonucci

Silica- and Zirconia-Hybridized Amorphous Calcium Phosphate: Effect on Transformation to Hydroxyapatite

March 1, 2002

Author(s)

Drago Skrtic, Joseph M. Antonucci, E D. Eanes, R T. Brunworth

The goal of this study was to determine the effect that silica- and zirconia have on the stability of bioactive amorphous calcium phosphate (ACP) mineral, I.e., in retarding its transformation to hydroxyapatite (HAP). The glass-forming agents

Effect of Polymer Matrices on Methacrylate Conversion and Mechanical Strength of Bioactive Composites Based on Amorphous Calcium Phosphate

January 1, 2002

Author(s)

Joseph M. Antonucci, Walter G. McDonough, D W. Liu, Drago Skrtic

Interfacial Properties of Hydroxyapatite Fluoroapatite and Octacalcium Phosphate

October 1, 2001

Author(s)

Ming S. Tung, Drago Skrtic

The surface properties of calcium phosphate salts, such as hydroxyapatite (OHAp), fluoroapatite (Fap) and octacalcium phosphate (OCP), determine their overall interfacial behavior, which includes processes such as adsorption, chemical uptake and exchange

Methacrylate Conversion in Photopolymerized Composites Containing Amorphous Calcium Phosphate Fillings

August 1, 2001

Author(s)

Joseph M. Antonucci, Drago Skrtic, R T. Brunworth

Recently a new class of photocurable composites has been developed that utilize amorphous calcium phosphate (ACP) as the filler phase with photoactivated dental monomer systems such as 2,2-bis[p-(2'-hydroxy-3'-methacryloxypropoxy)phenyl]propane (Bis-GMA)

Polymer Matrix Effects on the Properties of Amorphous Calcium Phosphate-Filled Composites

April 1, 2001

Author(s)

Drago Skrtic, Joseph M. Antonucci, D E. Eanes

Calcium phosphate are funding increasing use as biomaterials, e.g. in the treatment of defective mineralized tissues. Crystaline hydroxyapatite (HAP) is considered to be the final stable product in the precipitation of calcium and phosphate ions from

Methacrylate Conversion in Photo-polymerized Composites Containing Amorphous Calcium Phosphate Fillers

January 1, 2001

Author(s)

Joseph M. Antonucci, Drago Skrtic, R T. Brunworth

Physicochemical Evaluation of Bioactive Polymeric Composites Based on Hybrid Amorphous Calcium Phosphates

August 1, 2000

Author(s)

Joseph M. Antonucci, Drago Skrtic, A W. Hailer, E D. Eanes

Amorphous calcium phosphate (ACP), an important precursor in the biological formation of hydroxyapatite (HAP), has recently been utilized as a bioactive filler in resin-based dental materials. It was found that, if ACP was stabilized against premature

Effect of the Monomer and Filler Systems on the Remineralizing Potential of Bioactive Dental Composites Based on Amorphous Calcium Phosphate

June 1, 2000

Author(s)

Drago Skrtic, Joseph M. Antonucci, E D. Eanes

Amorphous calcium phosphate (ACP), because of its high solubility and its rapid transformation to hydroxyapatite (HAP) in aqueous environments, has been utilized as the filler phase in the preparation of bioactive polymer-based composites that have

Effect of Resin Composition on the Remineralizing Ability of Amorphous Calcium Phosphate-Based Polymeric Composites

May 15, 2000

Author(s)

Drago Skrtic, Joseph M. Antonucci, E D. Eanes

Five photoactivated resins, designated BTHZ, TP, U0H, U66H and U132H, were evaluated for the effects of the chemical structure and compositional variations of the resins on the release of mineral (Ca2+ and PO4) ions from ACPfilled composites, i.e. their

Effects of Resin Composition on the Remineralizing Ability of Amorphous Calcium Phosphate-Based Polymeric Composites

January 1, 2000

Author(s)

Joseph M. Antonucci, Drago Skrtic, E D. Eanes

Amorphous calcium phosphate (ACP)/acrylic matrix composites have the potential to promote remineralization and/or prevent demineralization of tooth structures by hydroxyapatite (HAP) formation. The goal of this study was to evaluate the effects of

Amorphous Alloys Containing Cobalt for Orthopaedic Applications

November 1, 1998

Author(s)

John A. Tesk, C E. Johnson, Drago Skrtic, Ming S. Tung, Stephen M. Hsu

Amorphous metal alloys have properties and structures unlike those of theircrystalline counterparts. For example, a multiphase crystalline structure may exhibit poor corrosion resistance while the amorphous structure is corrosion resistant. The high