Table 1: Comparison of average debonding strength between groups after bracket debonding (µm).

Group	Median	Minimum	Maximum	Mean rank
1	23.06	11.73	25.05	19.13a
2	37.37	21.77	48.08	46.23b
3	20.30	13.32	26.60	14.13a
4	31.85	21.61	44.90	42.50b

Group 1:Bonding metal bracket on non-indented surface; Group 2: Bonding ceramic bracket on non-indented surface; Group 3: Bonding metal bracket on indented surface; Group 4: Bonding ceramic bracket on indented surface. Similar superscript letter on the column indicates no statistically significant difference.