Table 2 Clinical and radiographic measurements around the crowns at crown delivery (T1) and the 12-month follow-up (T2). The amount of crestal bone loss was calculated by subtracting CBL measurements at T1 from T2 (T2-T1) with a positive value indicating bone loss

Tooth characteristics at T1

At deep caries site

(mean ± SD; mm)

Experimental

(n1 = 10)

Control

(n2 = 11)

Total

(N = 21)

p value

Crestal bone level

1.85 ± 1.0

1.94 ± 0.7

1.9 ± 0.8

0.83 ^*

Tooth characteristics at T2

At deep caries site

(mean ± SD; mm)

Experimental

(n1 = 10)

Control

(n2 = 9)

Total

(N = 19)

p value

Gingival recession

-0.4 ± 0.8

-0.4 ± 0.9

-0.4 ± 0.8

0.91 ^*

Pocket depth

2.7 ± 1.2

2.4 ± 1.0

2.6 ± 1.1

0.62 ^*

Crestal bone level

1.74 ± 1.1

1.91 ± 0.6

1.8 ± 0.9

0.68 ^*

The amount of crestal bone loss

-0.11 ± 0.4

-0.03 ± 0.5

-0.1 ± 0.4

0.67 ^*