PMID- 28941281
OWN - NLM
STAT- MEDLINE
DCOM- 20190930
LR  - 20190930
IS  - 1834-7819 (Electronic)
IS  - 0045-0421 (Linking)
VI  - 63
IP  - 1
DP  - 2018 Mar
TI  - In vitro fracture strength and patterns in root-filled teeth restored with 
      different base materials.
PG  - 99-108
LID - 10.1111/adj.12570 [doi]
AB  - BACKGROUND: There is little research on the effects of an intermediate base on 
      the fracture strength of root-filled teeth. This study compared the fracture 
      strengths and patterns of root-filled teeth restored with intermediate bases of 
      glass-ionomer cement (GIC), zinc polycarboxylate cement (ZPC), dual-cured resin 
      composite (DCRC) and Biodentine((R)) under resin composite. METHODS: Standardized 
      cavities were prepared in 100 extracted human maxillary and mandibular premolars, 
      and root canal treatment was performed. The teeth were stratified and randomly 
      allocated to five groups (n = 20): (i) GIC; (ii) ZPC; (iii) DCRC; (iv) 
      Biodentine; and (v) prepared but unrestored (control). The teeth were subjected 
      to an oblique, ramped load until fracture. The fracture loads, level, mode and 
      location were recorded. RESULTS: Mean fracture strengths of all restored groups 
      were not significantly different amongst the groups. There were significant 
      overall effects on mean fracture strength for tooth type (P = 0.002) and 
      buccolingual width of the crown (P = 0.001). CONCLUSIONS: The four materials were 
      appropriate intermediate bases. The laminate restorative technique promoted 
      fracture strengths that are likely to withstand normal and maximum masticatory 
      function. The base material can influence failure mode, which may have 
      implications for the clinical presentation of fractures of root-filled teeth.
CI  - (c) 2017 Australian Dental Association.
FAU - Chan, T
AU  - Chan T
AD  - The Melbourne Dental School, Faculty of Medicine, Dentistry and Health Sciences, 
      The University of Melbourne, Victoria, Australia.
FAU - Kucukkaya Eren, S
AU  - Kucukkaya Eren S
AUID- ORCID: 0000-0001-5023-1454
AD  - Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, 
      Turkey.
FAU - Wong, R
AU  - Wong R
AD  - The Melbourne Dental School, Faculty of Medicine, Dentistry and Health Sciences, 
      The University of Melbourne, Victoria, Australia.
FAU - Parashos, P
AU  - Parashos P
AUID- ORCID: 0000-0001-7191-0560
AD  - The Melbourne Dental School, Faculty of Medicine, Dentistry and Health Sciences, 
      The University of Melbourne, Victoria, Australia.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20171124
PL  - Australia
TA  - Aust Dent J
JT  - Australian dental journal
JID - 0370612
RN  - 0 (Composite Resins)
RN  - 0 (Glass Ionomer Cements)
SB  - IM
MH  - Bicuspid/physiopathology
MH  - Composite Resins/chemistry
MH  - Crowns
MH  - Dental Restoration, Permanent/*methods
MH  - Dental Stress Analysis/*methods
MH  - Dentin/chemistry
MH  - Flexural Strength
MH  - Glass Ionomer Cements/chemistry
MH  - Humans
MH  - In Vitro Techniques
MH  - Materials Testing
MH  - Random Allocation
MH  - Root Canal Obturation/*methods
MH  - Root Canal Therapy
MH  - Tooth Crown
MH  - *Tooth Fractures
MH  - Tooth Root
OTO - NOTNLM
OT  - Biodentine
OT  - fracture resistance
OT  - glass ionomer cement
OT  - restorative base
OT  - zinc polycarboxylate cement
EDAT- 2017/09/25 06:00
MHDA- 2019/10/01 06:00
CRDT- 2017/09/24 06:00
PHST- 2017/09/18 00:00 [accepted]
PHST- 2017/09/25 06:00 [pubmed]
PHST- 2019/10/01 06:00 [medline]
PHST- 2017/09/24 06:00 [entrez]
AID - 10.1111/adj.12570 [doi]
PST - ppublish
SO  - Aust Dent J. 2018 Mar;63(1):99-108. doi: 10.1111/adj.12570. Epub 2017 Nov 24.