In the centre of the window area, at the test sites, in the analysed histological sections, the bone plate was still visible in five out of six sheep. It appeared partly remodelled and connected by the new bone formed in the sub-window area. Out of the five bone plates still present, three were bridged to the edges of the antrostomy, while in the two cases no contact was achieved in the observed section. At the control sites, very little bone was found in the centre zone (5.8 ± 2.1%*), while soft tissue was the most represented (52.0 ± 11.8%*, P = 0.028). At the test sites, the high content of bone was represented by the bony window (61.5 ± 46.9%).

At the edge of the antrostomy, a higher content of the new bone was found at the test sites (37.2 ± 37%) compared with the control sites (9.2 ± 9.6%).

In the analysed histological slides, no remnants of cyanoacrylates were observed nor indirect signs of inflammatory response. All the percentages of various tissues in the antrostomy area can be seen in Table 2.