PMID- 31198370
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220408
IS  - 0976-4879 (Print)
IS  - 0975-7406 (Electronic)
IS  - 0975-7406 (Linking)
VI  - 11
IP  - Suppl 2
DP  - 2019 May
TI  - Impact Strength and Dimensional Accuracy of Heat-Cure Denture Base Resin 
      Reinforced With ZrO(2) Nanoparticles: An In Vitro Study.
PG  - S365-S370
LID - 10.4103/JPBS.JPBS_36_19 [doi]
AB  - BACKGROUND: Polymerization shrinkage and fracture are the two common trouble 
      shoots with denture base resins. Polymerization shrinkage affects the dimensional 
      accuracy and fit of the prosthesis. The effect of zirconia (ZrO(2)) nanoparticles 
      on polymerization shrinkage is not documented yet. PURPOSE: The aim and objective 
      of this study were to evaluate the impact strength and dimensional accuracy of 
      heat-cured poly methyl methacrylate (PMMA) on reinforcement with ZrO(2) 
      nanoparticles. MATERIALS AND METHODS: Conventional heat-cure denture base resin 
      (control) and the polymer reinforced with 3, 5, and 7 wt% of ZrO(2) nanoparticles 
      were prepared and used in this study. Forty bar-shaped specimens were prepared 
      and tested for impact strength using Charpy's type impact tester. Forty denture 
      bases were fabricated and checked for dimensional accuracy by measuring the 
      distance between the denture base and the cast in two different sections using 
      the travelling microscope. RESULTS: The impact strength decreased with increased 
      concentration of ZrO(2) and found to be least at 7 wt% concentration (2.01 +/- 0.26 
      J/mm(2)). The distance between the denture base and the cast significantly 
      decreased both in the posterior palatal seal region (0.060 +/- 0.007 cm) and 
      mid-palatine section region (0.057 +/- 0.006 cm) with ZrO(2) nanoparticles 
      reinforcement and was found to be least at 7 wt% concentration. CONCLUSION: 
      Reinforcement of heat-cured PMMA with ZrO(2) nanoparticles significantly 
      increased the dimensional accuracy and decreased the impact strength.
FAU - Begum, S Sajida
AU  - Begum SS
AD  - Department of Prosthodontics and Crown and Bridge, Vinayaka Missions 
      Sankarachariyar Dental College, Salem, Tamil Nadu, India.
FAU - Ajay, R
AU  - Ajay R
AD  - Department of Prosthodontics and Crown and Bridge, Vivekanandha Dental College 
      for Women, Tiruchengode, Tamil Nadu, India.
FAU - Devaki, V
AU  - Devaki V
AD  - Department of Prosthodontics and Crown and Bridge, Vivekanandha Dental College 
      for Women, Tiruchengode, Tamil Nadu, India.
FAU - Divya, Krishnamoorthi
AU  - Divya K
AD  - Private Practitioner, Salem, Tamil Nadu, India.
FAU - Balu, K
AU  - Balu K
AD  - Department of Prosthodontics and Crown and Bridge, Vivekanandha Dental College 
      for Women, Tiruchengode, Tamil Nadu, India.
FAU - Kumar, P Arun
AU  - Kumar PA
AD  - Department of Prosthodontics and Crown and Bridge, Vivekanandha Dental College 
      for Women, Tiruchengode, Tamil Nadu, India.
LA  - eng
PT  - Journal Article
PL  - India
TA  - J Pharm Bioallied Sci
JT  - Journal of pharmacy & bioallied sciences
JID - 101537209
PMC - PMC6555361
OTO - NOTNLM
OT  - Dimensional accuracy
OT  - PMMA
OT  - ZrO2 nanoparticles
OT  - impact strength
OT  - travelling microscope
COIS- There are no conflicts of interest.
EDAT- 2019/06/15 06:00
MHDA- 2019/06/15 06:01
PMCR- 2019/05/01
CRDT- 2019/06/15 06:00
PHST- 2019/06/15 06:00 [entrez]
PHST- 2019/06/15 06:00 [pubmed]
PHST- 2019/06/15 06:01 [medline]
PHST- 2019/05/01 00:00 [pmc-release]
AID - JPBS-11-365 [pii]
AID - 10.4103/JPBS.JPBS_36_19 [doi]
PST - ppublish
SO  - J Pharm Bioallied Sci. 2019 May;11(Suppl 2):S365-S370. doi: 
      10.4103/JPBS.JPBS_36_19.