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Wistar rats were implanted subcutaneously with samples of the home-made metacrylate material Akpol S and, for comparative purposes, with samples of the imported materials Trevalon and Superacryl. Throughout a period of 7 weeks, at 7-day intervals, sections of the tissues surrounding implants were collected from the animals and examined histopathologically. No differences in the character of the inflammatory reaction ensuing around the implants made from the three tested materials were observed. The dynamics of increase in the thickness of a pseudocapsule which developed at the edge of the inflammatory infiltration around the implants made from Akpol S and Trevalon was similar, whereas analogous values for the material Superacryl were higher. The conducted comparative in vivo studies permit us to evaluate positively the home-made metacrylate material Akpol S.

Wistar rats were implanted subcutaneously with 2.5 x 6 mm cylindrical matrices, made from the home-made metacrylate material Akpol S, and, for comparative purposes, with the imported materials Trevalon and Superacryl. At different time intervals quantitative and qualitative analyses of the picture of leucocytes and of blood plasma proteins were carried out in groups of animals implanted with the above-mentioned materials and in a control one. No differences in the values of the above parameters were found in any of the examined groups of animals. The carried out tests were aimed at making a thorough study of general reaction of the living organism to the new, home-made metacrylate material Akpol S, used for making removable dentures.