Comparison 1.

Liner versus no liner

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Postoperative hypersensitivity (POH) by patient report (Y/N)	4		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 24 hours follow‐up	1	88	Risk Ratio (M‐H, Random, 95% CI)	0.26 [0.11, 0.64]
1.2 1 week follow‐up	3	299	Risk Ratio (M‐H, Random, 95% CI)	0.56 [0.26, 1.17]
1.3 1 month follow‐up	3	253	Risk Ratio (M‐H, Random, 95% CI)	0.44 [0.15, 1.34]
2 Postoperative hypersensitivity (POH) by patient report (VAS)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.1 1 week follow‐up	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
2.2 1 month follow‐up	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
3 Cold response measurement (CRM) (time it took in seconds for patient to feel cold sensation)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.1 24 hours follow‐up	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
3.2 1 week follow‐up	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
3.3 1 month follow‐up	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
4 Cold response measurement (CRM) (VAS)	2		Mean Difference (IV, Random, 95% CI)	Subtotals only
4.1 1 week follow‐up	2	447	Mean Difference (IV, Random, 95% CI)	‐0.20 [‐0.67, 0.26]
4.2 1 month follow‐up	2	444	Mean Difference (IV, Random, 95% CI)	‐0.33 [‐0.76, 0.11]
5 Cold response measurement (CRM) (Y/N)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
5.1 1 week follow‐up	1		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
5.2 1 month follow‐up	1		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
6 Restoration failure at 1 year follow‐up	4	281	Risk Ratio (M‐H, Random, 95% CI)	1.0 [0.07, 15.00]