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International Poster Journal of Dentistry and Oral Medicine



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Int Poster J Dent Oral Med 14 (2012), No. 3     15. Sep. 2012

Int Poster J Dent Oral Med 2012, Vol 14 No 3, Poster 615

In vitro investigation on varios denture base materials wettability

Language: English

Dr. Alexandru-Titus Farcasiu, Dr. Oana-Cella Andrei,
University of Medicine and Pharmacy "Carol Davila", Faculty of Dental Medicine, Removable Prosthetic Department, Bucharest, Romania

November 18-19, 2011
615th Congress of AIOP
Bologna, Italy


The succesfull complete denture therapy could benefit, in case of xerostomic patient, from studies on wettability of denture base materials with natural or artificial saliva.


This in vitro investigation represents a starting point for the use of different methods to improve the hydrophilicity of denture-saliva system, which could increase the quality of life for the xerostomic pactient. Our objective is the evaluation of 4 moulding-type and 1 injection type denture base resins regarding their wetting capabilities with natural and artificial saliva.

Material and Methods

Six unpolished plates of PMMA resin were produced by different labs. The first lab used Eco-Cryl-Hot (Protechno, Spain) and Acry-Pol-R (Ruthinium, Germany), while the second lab utilized BMS 014 (BMS Dental, Italy) and Superacryl (Spofa, Czech Republic). Two different labs produced each one plate of Polyan (Bredent, Germany). The plates were cut in 10x10mm samples. Wettability was expressd after the measurement of the contact angle of unstimulated natural saliva and artificial saliva (Xerostom, Biocosmetics Laboratoires, Spain). The measurement was performed using CAM 101 system (KSV Intruments, Finland) which calculated the mean contact angle for 3 different sesile drops. The measurement system was set to read 20 contact angle values, at 1 second interval, exposing the dynamic nature of the phenomenon. The statistical analysis was performed with SPSS for Windows, v.10.0.1.

Fig. 1 Fig. 2: Xerostom artificial saliva
Fig. 3  
Material Saliva type Min. Max. Mean Std. Deviation
Eco Cryl Hot Natural saliva 61.68 79.83 70.5928 7.4246
Artificial saliva 40.02 57.44 51.7556 6.1572
Acry Pol R Natural saliva 72.98 82.49 77.7083 3.7906
Artificial saliva 36.38 55.01 45.5994 6.1554
Polian Natural saliva 72.80 89.09 78.9450 6.4310
Artificial saliva 36.75 48.09 43.0972 3.8008
BMS 014 Natural saliva 78.50 83.34 80.4017 1.7759
Artificial saliva 39.75 47.74 42.6906 3.2612
Superacryl Natural saliva 75.48 85.99 80.7956 4.0788
Artificial saliva 36.53 48.97 42.8311 4.8478
Tab. 1: Mean contact angles with natural and artificial saliva (°)


Artificial saliva wetts the resin 42% better than natural saliva. Eco-cryl-hot is most wettable with natural saliva (70,59°), while Polyan presents la lowest contact angle with artificial saliva (41,06°). Polyan, BMS 014 and Superacryl present the biggest differences (46°) between mean contact angles for artifical and natural saliva.

Fig. 4  
High wettability Saliva SS (p value) Low wettability
Eco Cryl Hot Natural 0.010 BMS 014
Eco Cryl Hot Natural 0.015 Superacryl
BMS 014 Artificial 0.014 Eco Cryl Hot
Superacryl Artificial 0.019 Eco Cryl Hot
Tab. 2

CAM 101 snapshots revealing the rheologic aspect of saliva-denture base system (images for records no. 1, 5, 10, 15, 20):

Fig. 5a: Natural saliva Fig. 5b: Natural saliva
Fig. 5c: Natural saliva Fig. 5d: Natural saliva
Fig. 5e: Natural saliva Fig. 5f: Natural saliva
Fig. 5g: Natural saliva Fig. 6a: Artificial saliva
Fig. 6b: Artificial saliva Fig. 6c: Artificial saliva
Fig. 6d: Artificial saliva Fig. 6e: Artificial saliva
Fig. 6f: Artificial saliva Fig. 6g: Artificial saliva


In the condition of the current in vitro experiment, artificial saliva seems to be more efective for the xerostomic denture wearer, while the measurements for the injection type are less variable, indicating a uniform surface. Further improvement of acrylic surface could improve the condition of xerostomic patient.

This Poster was submitted by Alexandru-Titus Farcasiu.

Correspondence address:
Alexandru-Titus Farcasiu
University of Medicine and Pharmacy "Carol Davila" Bucharest
Faculty of Dental Medicine, Removable Prosthetic Department
Str. Serghei Rahmaninov 76-80
020199 Bucharest