To compare the adherence of Candida albicans on
a polyamide surface with polymethyl-methacrylate
(PMMA), whose surface roughness was kept within the
acceptable range after using conventional polishing
Poly methyl methacrylate (PMMA) resins have
been routinely used as a denture base material because
of its desired properties and simple processing
techniques. Polyamides developed as alternatives to
PMMA, are nylon based materials, which are flexible in
nature. However, the surface characteristics and
especially the microbial adhesion of polyamides have
not been extensively evaluated in the literature.
Materials and Methods
A polyamide material (Sunflex) and PMMA
(Trevalon) were tested and compared. 10 rectangular
samples of each material were processed and
conventionally polished. The evaluated surface
roughness values of both the materials were below the
accepted threshold of 0.2μm Ra. Later these samples
were tested for adherence of C albicans.
The average Ra value of polyamide after polishing
was 0.044 μm ± 0.2. The Student‘t’ test, showed a
significant difference in the surface roughness of the
two materials, with PMMA being smoother than
polyamide (p – 0.005). The average Candida colony
count per microscopic field on 2nd and 4thday was
significantly more on polyamide surface and it again
increased on 8th and 12th day respectively but
Polyamide has a relatively rougher surface which
tends to increase the adherence of Candida compared to
PMMA. This might compromise the long term bio-
compatibility of polyamide as a denture base material.
Keywords : PMMA, Polyamide, Surface Roughness, Candida Alibicans.