Group

Mandibular teeth

Finish Line

Mean residual dentine thickness after preparations coronally (mm ± SD)

Mesial

(AMco)

Distal

(ADco)

Lingual

(Alco)

Buccal

(ABco)

1

Upper Laterals

Shoulder

0.53 ± 0.39

0.70 ± 0.13

1.30 ± 0.33

1.32 ± 0.34

2

Chamfer

0.73 ± 0.36

0.92 ± 0.22

1.47 ± 0.21

1.62 ± 0.30

3

Knife Edge

0.93 ± 0.19

1.15 ± 0.27

1.50 ± 0.30

1.51 ± 0.24

4

Lower Centrals

Shoulder

0.61 ± 0.11

0.63 ± 0.08

1.15 ± 0.25

1.02 ± 0.18

5

Chamfer

0.80 ± 0.17

0.97 ± 0.26

1.57 ± 0.12

1.37 ± 0.12

6

Knife Edge

1.02 ± 0.16

1.07 ± 0.19

1.58 ± 0.30

1.39 ± 0.20

7

Lower Laterals

Shoulder

0.67 ± 0.08

0.58 ± 0.20

1.22 ± 0.30

1.32 ± 0.32

8

Chamfer

0.80 ± 0.17

0.70 ± 0.10

1.55 ± 0.98

1.43 ± 0.22

9

Knife Edge

1.00 ± 0.25

1.05 ± 0.29

1.37 ± 0.36

1.47 ± 0.25

P-value

0.001

0.001

0.001

0.001