PMID- 24015000
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20130909
LR  - 20220410
IS  - 0976-237X (Print)
IS  - 0976-2361 (Electronic)
IS  - 0976-2361 (Linking)
VI  - 4
IP  - 2
DP  - 2013 Apr
TI  - Comparative evaluation of surface porosities in conventional heat polymerized 
      acrylic resin cured by water bath and microwave energy with microwavable acrylic 
      resin cured by microwave energy.
PG  - 147-51
LID - 10.4103/0976-237X.114844 [doi]
AB  - BACKGROUND: Conventional heat cure poly methyl methacrylate (PMMA) is the most 
      commonly used denture base resin despite having some short comings. Lengthy 
      polymerization time being one of them and in order to overcome this fact 
      microwave curing method was recommended. Unavailability of specially designed 
      microwavable acrylic resin made it unpopular. Therefore, in this study, 
      conventional heat cure PMMA was polymerized by microwave energy. AIM AND 
      OBJECTIVES: This study was designed to evaluate the surface porosities in PMMA 
      cured by conventional water bath and microwave energy and compare it with 
      microwavable acrylic resin cured by microwave energy. MATERIALS AND METHODS: Wax 
      samples were obtained by pouring molten wax into a metal mold of 25 mm x 12 mm x 
      3 mm dimensions. These samples were divided into three groups namely C, CM, and 
      M. Group C denotes conventional heat cure PMMA cured by water bath method, CM 
      denotes conventional heat cure PMMA cured by microwave energy, M denotes 
      specially designed microwavable acrylic denture base resin cured by microwave 
      energy. After polymerization, each sample was scanned in three pre-marked areas 
      for surface porosities using the optical microscope. As per the literature 
      available, this instrument is being used for the first time to measure the 
      porosity in acrylic resin. It is a reliable method of measuring area of surface 
      pores. Portion of the sample being scanned is displayed on the computer and with 
      the help of software area of each pore was measured and data were analyzed. 
      RESULTS: Conventional heat cure PMMA samples cured by microwave energy showed 
      maximum porosities than the samples cured by conventional water bath method and 
      microwavable acrylic resin cured by microwave energy. Higher percentage of 
      porosities was statistically significant, but well within the range to be 
      clinically acceptable. CONCLUSION: Within the limitations of this in-vitro study, 
      conventional heat cure PMMA can be cured by microwave energy without compromising 
      on its property such as surface porosity.
FAU - Singh, Sunint
AU  - Singh S
AD  - Department of Prosthodontics, Rayat Bahra Dental College and Hospital, Mohali, 
      Chandigarh, Punjab, India.
FAU - Palaskar, Jayant N
AU  - Palaskar JN
FAU - Mittal, Sanjeev
AU  - Mittal S
LA  - eng
PT  - Journal Article
PL  - India
TA  - Contemp Clin Dent
JT  - Contemporary clinical dentistry
JID - 101552967
PMC - PMC3757873
OTO - NOTNLM
OT  - Denture base resin
OT  - microwave polymerization
OT  - poly methyl methacrylate
COIS- Conflict of Interest: None declared.
EDAT- 2013/09/10 06:00
MHDA- 2013/09/10 06:01
PMCR- 2013/04/01
CRDT- 2013/09/10 06:00
PHST- 2013/09/10 06:00 [entrez]
PHST- 2013/09/10 06:00 [pubmed]
PHST- 2013/09/10 06:01 [medline]
PHST- 2013/04/01 00:00 [pmc-release]
AID - CCD-4-147 [pii]
AID - 10.4103/0976-237X.114844 [doi]
PST - ppublish
SO  - Contemp Clin Dent. 2013 Apr;4(2):147-51. doi: 10.4103/0976-237X.114844.