PMID- 10023203
OWN - NLM
STAT- MEDLINE
DCOM- 19990222
LR  - 20191024
IS  - 0109-5641 (Print)
IS  - 0109-5641 (Linking)
VI  - 14
IP  - 2
DP  - 1998 Mar
TI  - Mechanical properties of bioactive amorphous calcium phosphate/methacrylate 
      composites.
PG  - 137-41
AB  - OBJECTIVES: The aim of this study was to determine whether amorphous calcium 
      phosphate (ACP)-containing composites, which have the ability to release 
      mineralizing levels of Ca and PO4 ions, have appropriate mechanical properties 
      for use as base and lining materials. METHODS: Composites of 
      pyrophosphate-stabilized ACP particulates (mass fraction of 40%) and 
      photo-activated methacrylate resins (mass fraction of 60%) were tested for 
      biaxial flexure strength (BFS), diametral tensile strength (DTS), and compressive 
      strength (CS). Hydroxyapatite (HAP; mass fraction of 40%), and micro-sized glass 
      (mass fraction of 50%) composites as well as a commercial visible light curable 
      base/liner were also tested. The significance between mean values was determined 
      by Student-Newman-Keuls multiple comparisons (p < 0.05). RESULTS: BFS of dry and 
      wet (24 h at 37 degrees C in water) ACP composites (60.3 and 62.0 MPa, 
      respectively) were significantly lower than those of the comparison materials 
      (79.2-109.3 MPa). CS values were likewise lower (62.9 MPa dry and 67.6 MPa wet vs 
      80.6-196.8 MPa) except for the wet base/liner (58.5 MPa). DTS of the dry ACP 
      composite (21.8 MPa) was comparable with that of the HAP (22.8 MPa) and glass 
      (25.5 MPa) composites, but lower than that of the base/liner (36.2 MPa). DTS 
      decreased significantly when the ACP composite was wet (17.8 MPa). SIGNIFICANCE: 
      These results suggest that the remineralizing ACP polymeric composites, although 
      mechanically weaker in some respects than other polymeric composites, have 
      properties suitable for use as base and lining materials.
FAU - Park, M S
AU  - Park MS
AD  - Phil Dental Clinic, Kyung Ki Do, Korea.
FAU - Eanes, E D
AU  - Eanes ED
FAU - Antonucci, J M
AU  - Antonucci JM
FAU - Skrtic, D
AU  - Skrtic D
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - England
TA  - Dent Mater
JT  - Dental materials : official publication of the Academy of Dental Materials
JID - 8508040
RN  - 0 (Biocompatible Materials)
RN  - 0 (Calcium Phosphates)
RN  - 0 (Composite Resins)
RN  - 0 (Dental Cements)
RN  - 0 (TimeLine)
RN  - 0 (amorphous calcium phosphate)
RN  - 3IN71E75Z5 (Urethane)
RN  - 454I75YXY0 (Bisphenol A-Glycidyl Methacrylate)
RN  - 8ZYQ1474W7 (Sodium Fluoride)
RN  - 91D9GV0Z28 (Durapatite)
MH  - Analysis of Variance
MH  - Biocompatible Materials/*chemistry
MH  - Bisphenol A-Glycidyl Methacrylate/chemistry
MH  - Calcium Phosphates/*chemistry
MH  - Composite Resins/*chemistry
MH  - Compressive Strength
MH  - *Dental Cavity Lining
MH  - Dental Cements/*chemistry
MH  - Durapatite/chemistry
MH  - Evaluation Studies as Topic
MH  - Materials Testing
MH  - Pliability
MH  - Sodium Fluoride
MH  - Tensile Strength
MH  - Tooth Remineralization
MH  - Urethane/analogs & derivatives
EDAT- 1999/02/19 00:00
MHDA- 1999/02/19 00:01
CRDT- 1999/02/19 00:00
PHST- 1999/02/19 00:00 [pubmed]
PHST- 1999/02/19 00:01 [medline]
PHST- 1999/02/19 00:00 [entrez]
AID - S0109-5641(98)00020-7 [pii]
AID - 10.1016/s0109-5641(98)00020-7 [doi]
PST - ppublish
SO  - Dent Mater. 1998 Mar;14(2):137-41. doi: 10.1016/s0109-5641(98)00020-7.