Table 6.

Sinus mucosa thickness at the various periods of evaluation

	T0	T1	T2	Δ T1–T0	Δ T2–T1	Δ T2–T0
No-membrane	5.6 ± 8.4	10.5 ± 7.0	1.3 ± 0.9	4.8 ± 7.6	− 9.1 ± 6.4	− 4.3 ± 7.7
Membrane	2.1 ± 2.1	6.3 ± 6.9	1.5 ± 1.2	4.1 ± 7.8	− 4.8 ± 6.9	− 0.6 ± 2.4

None of the differences was statistically significant between group A and group B. Δ difference, T1 1 week, T2 9 months. Data in millimeters

p < 0.05