Measurement

Group

Mandibular teeth

Finish Line

Computed mean enamel-dentine thickness before preparations (mm ± SD)

Mesial

Mco

Distal

Dco

Lingual

Lco

Buccal

Bco

1

Upper Laterals

Shoulder

1.73 ± 0.39

1.90 ± 0.13

2.80 ± 0.32

2.81 ± 0.34

2

Chamfer

1.73 ± 0.35

1.91 ± 0.22

2.66 ± 0.21

2.82 ± 0.30

3

Knife Edge

1.73 ± 0.19

1.95 ± 0.27

2.70 ± 0.30

2.71 ± 0.24

4

Lower Centrals

Shoulder

1.82 ± 0.11

1.83 ± 0.08

2.65 ± 0.25

2.51 ± 0.19

5

Chamfer

1.80 ± 0.17

1.97 ± 0.26

2.77 ± 0.12

2.57 ± 0.12

6

Knife Edge

1.82 ± 0.16

1.87 ± 0.19

2.78 ± 0.30

2.59 ± 0.20

7

Lower Laterals

Shoulder

1.87 ± 0.08

1.78 ± 0.20

2.71 ± 0.30

2.82 ± 0.32

8

Chamfer

1.80 ± 0.17

1.70 ± 0.10

2.75 ± 0.20

2.63 ± 0.22

9

Knife Edge

1.80 ± 0.24

1.85 ± 0.29

2.57 ± 0.36

2.67 ± 0.25