Mean residual dentine thickness after preparation (mm ± SD)

Group

Mandibular teeth

Finish Line

Mesial

(AMce)

Distal

(ADce)

Lingual

(ALce)

Buccal

(ABce)

1

Upper Laterals

Shoulder

0.70 ± 0.09

0.58 ± 0.16

1.28 ± 0.41

1.03 ± 0.31

2

Chamfer

0.92 ± 0.31

1.02 ± 0.22

1.42 ± 0.33

1.32 ± 0.15

3

Knife Edge

1.60 ± 0.10

1.62 ± 0.19

2.05 ± 0.21

1.80 ± 0.20

4

Lower Centrals

Shoulder

0.60 ± 0.12

0.63 ± 1.18

1.08 ± 0.22

1.10 ± 0.12

5

Chamfer

0.60 ± 0.12

0.63 ± 0.18

1.65 ± 0.25

1.42 ± 0.11

6

Knife Edge

1.55 ± 0.16

1.47 ± 0.18

2.05 ± 0.40

2.02 ± 0.28

7

Lower Laterals

Shoulder

0.58 ± 0.22

0.65 ± 0.28

1.15 ± 0.29

0.83 ± 0.22

8

Chamfer

0.78 ± 0.20

0.85 ± 0.10

1.53 ± 0.17

1.25 ± 0.14

9

Knife Edge

1.55 ± 0.16

1.47 ± 0.17

2.12 ± 0.33

1.97 ± 0.21

P value

0.001

0.001

0.001

0.001