Table 2.

Descriptive statistic for each measured group

Group	Mean	Median	Maximum	Minimum	95% CI
1 (pre-op)	8.2	6.9	19.4	0	5.1–11.36
1 (post-op)	4.3	3.9	13.8	0	3.1–6.5
2 (pre-op)	7.4	5.8	19.5	1.04	3.9–9.9
2 (post-op)	2.7	2.0	13.2	0	1.7–3.7
3 (pre-op)	5.1	4.8	14.4	0.88	1.9–6.7
3 (post-op)	3.8	2.1	10.2	0	1.5–5.9

Mean, Median Maximum, minimum and confidence interval for Schneider membrane thickness in mm

1) Root canal treatment; 2) Root canal re-treatment; 3) Indirect pulp capping