Biomaterial Database

Failure and fracture characteristics of glass poly(vinylphosphonate) cements. 1998

B Fennell, and R G Hill, and A Akinmade

Department of Materials Science and Technology, University of Limerick, Plassey Technological Park, Castletroy, Ireland. barry.fennell@ul.ie/robert.hill@ul.ie

OBJECTIVE A glass poly(vinylphosphonate) cement, Diamond Carve, consisting of an ion leachable glass and a co-polymer of poly(vinylphosphonic-co-acrylic acid) was characterised. Samples were mixed for mechanical analysis using a linear elastic fracture mechanics (LEFM) approach. METHODS Fracture toughness, flexural strength, Young's modulus, toughness and compressive strength were measured. Cement samples were tested at ageing times of 1, 7, 28, 84 and 168 days. RESULTS Fracture toughness values in the range 0.6-0.82 MPa square root m were obtained. Young's modulus increased with ageing time from 8.6 GPa at one day to 14.3 GPa at 168 days. An increase in compressive strength from 149 to 242 MPa was also observed over the same time period. CONCLUSIONS The influence of ageing time had a significant effect on the mechanical properties of the cement. The expected rise in the mechanical properties was observed as a result of the ongoing crosslinking in the polysalt matrix.

UI	MeSH Term	Description	Entries
D008422	Materials Testing	The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.	Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D009943	Organophosphorus Compounds	Organic compounds that contain phosphorus as an integral part of the molecule. Included under this heading is broad array of synthetic compounds that are used as PESTICIDES and DRUGS.	Organophosphorus Compound,Organopyrophosphorus Compound,Organopyrophosphorus Compounds,Compound, Organophosphorus,Compound, Organopyrophosphorus,Compounds, Organophosphorus,Compounds, Organopyrophosphorus
D010755	Organophosphates	Carbon-containing phosphoric acid derivatives. Included under this heading are compounds that have CARBON atoms bound to one or more OXYGEN atoms of the P(	Organophosphate,Phosphates, Organic,Phosphoric Acid Esters,Organopyrophosphates,Acid Esters, Phosphoric,Esters, Phosphoric Acid,Organic Phosphates
D003738	Dental Cements	Substances used to bond COMPOSITE RESINS to DENTAL ENAMEL and DENTIN. These bonding or luting agents are used in restorative dentistry, ROOT CANAL THERAPY; PROSTHODONTICS; and ORTHODONTICS.	Dental Adhesives,Luting Agents,Orthodontic Adhesives,Cement, Dental,Cements, Dental,Dental Cement,Adhesive, Dental,Adhesive, Orthodontic,Adhesives, Dental,Adhesives, Orthodontic,Dental Adhesive,Luting Agent,Orthodontic Adhesive
D004548	Elasticity	Resistance and recovery from distortion of shape.
D013718	Tensile Strength	The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001)	Strength, Tensile,Strengths, Tensile,Tensile Strengths
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor
D018583	Pliability	The quality or state of being able to be bent or creased repeatedly. (From Webster, 3d ed)	Flexibility
D019245	Compressive Strength	The maximum compression a material can withstand without failure. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p427)	Compressive Strengths,Strength, Compressive,Strengths, Compressive