Histopathological evaluation of the effects of fiber reinforced acrylic resins on living tissues.
OBJECTIVE
The aim of this study was the histopathological evaluation of the effects of the fiber reinforced acrylic resins on living tissues.


METHODS
The study was performed on 21 rabbits. Three groups, each including seven subjects, were formed. There was no applied plate in the control group. For the second group, heat-polymerized acrylic resin plates were inserted. For the third group, heat-polymerized acrylic resin plates containing proportionally 5% chopped silanated E type glass fiber were inserted. Plates were fixed to the palatine bone of the rabbits with titanium screws. Before the implementation of the plates and 1 month after the plates were applied, soft tissue samples were taken from the buccal mucosa of the rabbits. Also, tissue samples were taken from the control group. All samples were evaluated histopathologically.


RESULTS
In the control group, only a focal atrophy was observed. In the acrylic group, large decomposition containing erythrocytes under the parahyperkeratotic region and micro-vesicle like spongiotic tissue reactions were observed. In the fiber reinforced acrylic group, widespread focal atrophy, bulgy look of the epithelium cells similar to apoptosis, over-distension and sub-corneal decomposition had been observed. In terms of atrophy and hyperkeratosis there were no statistically significant differences among groups. However, in respect to sub-corneal decomposition, there was a statistically significant difference in the fiber reinforced group (p < 0.01).


CONCLUSIONS
The statistically significant difference in the sub-corneal decomposition of the fiber reinforced group had made us think that fiber edges had a traumatic effect on the reaction.
Cumhuriyet University, Faculty of Dentistry, Department of Prosthodontics, Sivas, Turkey.
Ali Kemal
AK
Özdemir
Nilüfer Tülin
NT
Polat
Mehmet
M
Turgut
Derya
D
Özdemir  Dogan
Fahrettin
F
Göze
D000180:Acrylic Resins; D000818:Animals; D005898:Glass; D009061:Mouth Mucosa / Q000473:pathology*; D011817:Rabbits
D000180:Acrylic Resins; C009753:fiberglass