PMID- 23827810
OWN - NLM
STAT- MEDLINE
DCOM- 20150410
LR  - 20181101
IS  - 1879-176X (Electronic)
IS  - 0300-5712 (Linking)
VI  - 41
IP  - 9
DP  - 2013 Sep
TI  - The effect of Parylene coating on the surface roughness of PMMA after brushing.
PG  - 802-8
LID - S0300-5712(13)00160-7 [pii]
LID - 10.1016/j.jdent.2013.06.011 [doi]
AB  - OBJECTIVES: Acrylic resins, used in the manufacturing of different types of 
      intra-oral prostheses, are vulnerable to colonisation by microorganisms which 
      potentially endanger the general health of the prostheses, wearers. The aim of 
      this study was to investigate the influence of a novel coating (Parylene) on 
      surface roughness of poly-methyl-methacrylate (PMMA) samples after simulated 
      cleansing using an electric toothbrush and two brushing media (paste and pumice). 
      METHODS: Fifty-six square PMMA samples were fabricated. Half of the samples were 
      coated with a uniform 10mum, coating of Parylene. All samples were subjected to 
      simulated brushing with either paste or pumice. Changes in surface roughness were 
      measured with a laser non-contact profilometer and compared between groups. 
      Scanning electron microscopy (SEM) and Raman spectroscopy were utilised for 
      surface visualisation and analysis. RESULTS: In the coated samples, the mean 
      surface roughness remained the same before and after brushing in the Paste group 
      2.69mum (SD=0.92 and SD=0.87 respectively), and increased from 3.73mum (SD=1.25) 
      to, 5.05mum (SD=1.40) in the Pumice Group. In the uncoated samples, the mean 
      surface roughness increased from 4.45mum (SD=0.92) to 6.73mum (SD=1.73) in the 
      Paste group, and from 3.67mum (SD=0.74), to 7.50mum (SD=2.25) in the Pumice Group. 
      Differences between the coated and uncoated groups were statistically significant 
      (p<0.05). The surface analyses revealed that the coating remained adhered to the 
      PMMA, although signs of partial detachment were noticed in the Pumice Group. 
      CONCLUSION: The Parylene coating resulted in a reduction of surface roughness of 
      PMMA after brushing procedures. CLINICAL SIGNIFICANCE: Parylene appears to 
      maintain a low surface roughness of PMMA after abrasion by brushing.
CI  - Copyright (c) 2013 Elsevier Ltd. All rights reserved.
FAU - Santos, Mariana
AU  - Santos M
AD  - Department of Restorative Dentistry, UCL Eastman Dental Institute, London WC1X 
      8LD, UK.
FAU - Soo, Steven
AU  - Soo S
FAU - Petridis, Haralampos
AU  - Petridis H
LA  - eng
PT  - Comparative Study
PT  - Journal Article
DEP - 20130701
PL  - England
TA  - J Dent
JT  - Journal of dentistry
JID - 0354422
RN  - 0 (Coated Materials, Biocompatible)
RN  - 0 (Denture Cleansers)
RN  - 0 (Polymers)
RN  - 0 (Silicates)
RN  - 0 (Toothpastes)
RN  - 0 (Xylenes)
RN  - 25722-33-2 (parylene)
RN  - 9011-14-7 (Polymethyl Methacrylate)
RN  - NT5NN5KL16 (pumice)
SB  - IM
MH  - Adhesiveness
MH  - Coated Materials, Biocompatible/*chemistry
MH  - Denture Cleansers/chemistry
MH  - Lasers, Gas
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - Polymers/*chemistry
MH  - Polymethyl Methacrylate/*chemistry
MH  - Silicates/chemistry
MH  - Spectrum Analysis, Raman/instrumentation
MH  - Surface Properties
MH  - Toothbrushing/instrumentation
MH  - Toothpastes/chemistry
MH  - Xylenes/*chemistry
OTO - NOTNLM
OT  - Acrylic
OT  - Brushing
OT  - Coating
OT  - PMMA
OT  - Parylene
OT  - Roughness
EDAT- 2013/07/06 06:00
MHDA- 2015/04/11 06:00
CRDT- 2013/07/06 06:00
PHST- 2013/03/07 00:00 [received]
PHST- 2013/06/19 00:00 [revised]
PHST- 2013/06/22 00:00 [accepted]
PHST- 2013/07/06 06:00 [entrez]
PHST- 2013/07/06 06:00 [pubmed]
PHST- 2015/04/11 06:00 [medline]
AID - S0300-5712(13)00160-7 [pii]
AID - 10.1016/j.jdent.2013.06.011 [doi]
PST - ppublish
SO  - J Dent. 2013 Sep;41(9):802-8. doi: 10.1016/j.jdent.2013.06.011. Epub 2013 Jul 1.