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Titolo:
MONOMETHACRYLATE CO-MONOMERS FOR DENTAL RESINS
Autore:
LABELLA R; DAVY KWN; LAMBRECHTS P; VANMEERBEEK B; VANHERLE G;
Indirizzi:
CATHOLIC UNIV LOUVAIN,SCH DENT ORAL PATHOL & MAXILLOFACIAL SURG,DEPT OPERAT DENT & DENT MAT B-3000 LOUVAIN BELGIUM ROYAL LONDON SCH MED & DENT,QMW COLL LONDON ENGLAND UNIV LONDON,DEPT BIOMAT RELAT DENT,IRC BIOMAT LONDON ENGLAND
Titolo Testata:
European journal of oral sciences
fascicolo: 3, volume: 106, anno: 1998,
pagine: 816 - 824
SICI:
0909-8836(1998)106:3<816:MCFDR>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYMERIZATION CONTRACTION; COMPOSITES; CONVERSION; SHRINKAGE;
Keywords:
DENTAL MATERIALS; RESINS; POLYMERIZATION SHRINKAGE; DEGREE OF CONVERSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
R. Labella et al., "MONOMETHACRYLATE CO-MONOMERS FOR DENTAL RESINS", European journal of oral sciences, 106(3), 1998, pp. 816-824

Abstract

Polymerisation shrinkage is widely recognised as a major drawback of resin based dental restoratives. Bis-GMA is often employed as the principal dimethacrylate monomer. Due to its high viscosity, Bis-GMA is normally mixed with large proportions of low viscosity glycol dimethacrylates. The purpose of this study was to determine whether the polymerisation shrinkage of Bis-GMA-based resins would be lower if alternativemonomethacrylate co-monomers were used in place of conventional dimethacrylate co-monomers as viscosity modifiers. Conventional resins usedwere ethyleneglycol dimethacrylate and triethyleneglycol dimethacrylate; the alternative monofunctional co-monomers were tetrahydrofurfurylmethacrylate, hydroxypropyl methacrylate and isobornyl methacrylate. Model resins containing 54% mol/mol of co-monomer in Bis-GMA and 1% w/w of benzoyl peroxide as initiator were heat-cured at 70 degrees C for8 h. Polymerisation shrinkage, degree of conversion and concentrationof remaining methacrylate groups were calculated from density changesobtained gravimetrically. Other properties evaluated were Young's modulus, water uptake and viscosity of the monomer mixtures. The Bis-GMA-based resins exhibited lower shrinkage when mixed using the monomethacrylates rather than with conventional glycol dimethacrylates. Among the alternative co-monomers, tetrahydrofurfuryl methacrylate conferred the best balance of all measured properties.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:13:50