PMID- 11556961
OWN - NLM
STAT- MEDLINE
DCOM- 20011204
LR  - 20220330
IS  - 0305-182X (Print)
IS  - 0305-182X (Linking)
VI  - 28
IP  - 8
DP  - 2001 Aug
TI  - The influence of fibre placement and position on the efficiency of reinforcement 
      of fibre reinforced composite bridgework.
PG  - 785-91
AB  - The effect of placement of ultra-high molecular weight polyethylene (UHMWPE) 
      fibres on the flexural properties and fracture resistance of a direct dental 
      composite was investigated. The UHMWPE fibres are increasingly being used for the 
      reinforcement of laboratory fabricated resin composite crown and bridgework. The 
      aim of this study was to assess the effect of a commonly used laboratory 
      fabrication variable on the in vitro strength of beam shaped specimen simulating 
      a three-unit fixed bridge. Four groups (10 specimens per group) of Herculite XRV 
      were prepared for flexural modulus and strength testing after reinforcement with 
      UHMWPE fibres. Two groups of control specimens were prepared without any fibre 
      reinforcement. Half the specimen groups were stored in distilled water and the 
      other groups were stored dry, both at 37 degrees C for 2 weeks before testing. 
      The results of this study showed that placement of fibre at or slightly away from 
      the tensile side improved the flexural properties of the composite in comparison 
      with the unreinforced control specimen groups whilst the mode of failure differed 
      according to fibre position. Scanning electron microscope (SEM) investigation 
      revealed that placement of the fibre slightly away from the tensile side favoured 
      crack development and propagation within the resin bridging the interfibre spaces 
      in addition to debonding parallel to the direction of fibre placement. Laboratory 
      fabrication variables may effect the strength of fibre reinforced bridgework 
      significantly.
FAU - Ellakwa, A E
AU  - Ellakwa AE
AD  - Biomaterials and Conservative Departments, School of Dentistry, The University of 
      Birmingham, UK.
FAU - Shortall, A C
AU  - Shortall AC
FAU - Shehata, M K
AU  - Shehata MK
FAU - Marquis, P M
AU  - Marquis PM
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - England
TA  - J Oral Rehabil
JT  - Journal of oral rehabilitation
JID - 0433604
RN  - 0 (Composite Resins)
RN  - 0 (Polyethylenes)
RN  - 0 (Resin Cements)
RN  - 0 (ultra-high molecular weight polyethylene)
RN  - 059QF0KO0R (Water)
RN  - 117681-12-6 (Herculite XR)
SB  - IM
MH  - Analysis of Variance
MH  - Composite Resins/*chemistry
MH  - Compressive Strength
MH  - Crowns
MH  - *Denture Design
MH  - *Denture, Partial
MH  - Denture, Partial, Fixed
MH  - Humans
MH  - Immersion
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - Pliability
MH  - Polyethylenes/*chemistry
MH  - Resin Cements/chemistry
MH  - Statistics as Topic
MH  - Stress, Mechanical
MH  - Surface Properties
MH  - Temperature
MH  - Tensile Strength
MH  - Time Factors
MH  - Water
EDAT- 2001/09/15 10:00
MHDA- 2002/01/05 10:01
CRDT- 2001/09/15 10:00
PHST- 2001/09/15 10:00 [pubmed]
PHST- 2002/01/05 10:01 [medline]
PHST- 2001/09/15 10:00 [entrez]
AID - jor792 [pii]
AID - 10.1046/j.1365-2842.2001.00792.x [doi]
PST - ppublish
SO  - J Oral Rehabil. 2001 Aug;28(8):785-91. doi: 10.1046/j.1365-2842.2001.00792.x.