Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by:

Displaying 51 - 75 of 123

Synthesis and Characterization of Methacrylate Derivatives of Oligo-Ether Carbonate Diols

April 1, 2005

Author(s)

S Bencherif, K S. Wilson, Elizabeth Wilder, Joseph M. Antonucci

Dimethacrylate monomers of several types are widely used in preventative and restorative dental applications. One such monomer that ushered in the modern era of polymeric based dental materials is 2,2-bis[p-(2'-hydroxy-3'-methacryloxyoxypropoxy)phenyl]

Amorphous Calcium Phosphate Based Polymeric Composites: Effects of Polymer Composition and Filler's Particle Size on Composite Properties

January 1, 2005

Author(s)

Drago Skrtic, Sanghun Lee, Joseph M. Antonucci, Da-Wei Liu

This study explores how a) resin grafting potential for amorphous calcium phosphate (ACP) and b) particle size of ACP affects physicochemical properties of composites. Copolymers and composites were evaluated for biaxial flexure strength (BFS), degree of

Analysis by Mass Spectrometry of the Hydrolysis/Condensation Reaction of a Trialkoxysilane in Various Dental Monomer Solutions

January 1, 2005

Author(s)

M Farahani, William E. Wallace, Joseph M. Antonucci, Charles M. Guttman

In Situ Formation of Blends By Photopolymerization of Poly(ethylene glycol) Dimethacrylate and Polylactide

January 1, 2005

Author(s)

K J. Zhang, Carl Simon Jr., N Washburn, Joseph M. Antonucci, Sheng Lin-Gibson

Blends of crosslinked poly(ethylene glycol dimethacrylate) (PEGDMA) with poly (D, L-lactide) (PLA) were prepared by mixing photo-activated PEGDMA (molecular mass: 875 g/mol) and PLA, and subsequently photopolymerizing with visible light. The effects of PLA

Matrix Resin Effects on Selected Physicochemical Properties of Amorphous Calcium Phosphate Composites

January 1, 2005

Author(s)

Joseph M. Antonucci, Drago Skrtic

Synthesis and Characterization of Poly(ethylene glycol) Dimethacrylate Hydrogels

January 1, 2005

Author(s)

Sheng Lin-Gibson, S Bencherif, Joseph M. Antonucci, Horkay F. JonesRL

Facile synthesis and detailed characterization of photo-polymerizable and biocompatible poly(ethylene glycol) dimethacrylates (PEGDM) and their hydrogels are described. Combined analyses of 1H NMR and MALDI-TOF MS confirmed the formation of prepolymers of

Analysis of the Interactions of a Trialkoxysilane With Dental Monomers by MALDI-TOF Mass Spectrometry

August 1, 2004

Author(s)

M Farahani, Joseph M. Antonucci, Kathleen M. Flynn

Depending on the chemical structure of the dental monomer, 3-methacryloxypropyltrimethoxysilane (MPTMS) and other trialkoxysilanes were shown by infrared spectroscopy to undergo two types of reactions in the presence of methacrylic monomers commonly used

Biocompatible Polymer Blends Derived From the Photopolymerization of Polyethylene Glycol Dimethacrylate-Polylactide Mixtures

August 1, 2004

Author(s)

K Zhang, Sheng Lin-Gibson, Carl G. Simon Jr., Joseph M. Antonucci, N Washburn

Miscible liquid blends of photoactivated PEGDMA and low molecular mass PLA were prepared by simple heating. Subsequent photo-polymerization of the activated PEGDMA and PLA yielded clear polymeric blends. The addition of low molecular mass PLA did not

Dental Polymeric Composites Activated With Camphorquinone or Diacyl Phosphine Oxide Photoinitiators

August 1, 2004

Author(s)

N D. Richards, Sabine H. Dickens, Joseph M. Antonucci

Polymeric dental composites based on the highly viscous 2,2-bis[p-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane (BisGMA) have been used for over four decades.1 Because of its high viscosity, BisGMA is blended with diluent, lower molecular mass monomers

Organogelators and Their Application in Dental Materials

August 1, 2004

Author(s)

Elizabeth Wilder, Janet Quinn, Joseph M. Antonucci

Dibenzylidene sorbitol (DBS) is an organic molecule capable of inducing physical gelation in a wide variety of organic solvents and polymer melts by forming three-dimensional networks. Recent efforts in this laboratory have found that DBS is capable of

Synthesis and Characterization of PEG Dimethacrylates and their Hydrogels

July 1, 2004

Author(s)

Sheng Lin-Gibson, S Bencherif, James A. Cooper, S Wetzel, Joseph M. Antonucci, Brandon M. Vogel, F Horkay, N. R. Washburn

Facile synthesis and detailed characterization of photo-polymerizable and biocompatible poly(ethylene glycol) dimethacrylates (PEGDM) and poly(ethylene glycol) urethane-dimethacrylates (PEGUDM) are described. Poly(ethylene glycol)s of various molecular

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

Synthesis and Characterization of PEG and PEG Urethane Dimethacrylate Hydrogels

March 1, 2004

Author(s)

Sheng Lin-Gibson, S Bencherif, James A. Cooper, N. R. Washburn, Joseph M. Antonucci

A key area in the repair and regeneration of tissues is optimizing the polymeric scaffold-tissue response. This study is designated to better understand the relationships between polymer matrix structure and properties to cell response. The current study

Organogelators and Their Application in Bioactive Dental Composites

February 1, 2004

Author(s)

Elizabeth Wilder, Joseph M. Antonucci

Concerns regarding the use of amalgam fillings in restorative dentistry have spurred an interest in alternative polymeric dental materials such as bioactive composites. However, current polymeric dental composites are inadequate for use in posterior dental

Structure-Property Relationships of Thermoset Methacrylate Composites as a Function of Resin Matrices, Nanofillers, and Nanofiller Surface Chemistries

February 1, 2004

Author(s)

K W. O'Brien, Elizabeth Wilder, Joseph M. Antonucci

The goal of this research is to better understand the interactions and relationships between nanoparticle fillers, their surface treatment chemistries, various dental resin matrices, and the resultant properties of these thermoset methacrylate composites

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

Thermal and Flammability Properties of a Silica-PMMA Nanocomposite

June 1, 2003

Author(s)

Takashi Kashiwagi, A B. Morgan, Joseph M. Antonucci, Mark R. VanLandingham, Richard H. Harris Jr., W H. Awad, John R. Shields

PMMA, poly(metheylmethacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacrylate, with colloidal silica (ca. 12 nm) to study the effects of nanoscale silica particles on the physical properties and flammability

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

Chemistry of Silanes Interfaces in Dental Polymers and Composites

January 1, 2003

Author(s)

Joseph M. Antonucci, Sabine H. Dickens, Bruce O. Fowler, H H. Xu, Walter G. McDonough

The performance and service life of glass- or ceramic-filled polymeric composites depend on the nature of their resin, filler and interfacial phases as well as the efficacy of the polymerization process. The synergy that exists between the organic polymer

Continuous-Fiber Preform Reinforcement of Dental Resin Composite Restorations

January 1, 2003

Author(s)

H H. Xu, Gary E. Schumacher, F Eichmiller, R C. Peterson, Joseph M. Antonucci, H J. Mueller

Objectives. Direct-filling resin composites are used in relatively small restorations and are not recommended for large restorations with severe occlusal stresses. The aim of this study was to reinforce composites with fiber preforms, and to investigate

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