Skip to main content
. 2017 Jun 9;12(3):291–295. doi: 10.1016/j.jds.2017.04.002

Table 3.

The relationships among restoration size, classification, material, and crack.

Restoration size in occlusal plane Cavity classification
Material
Extending crack patterns in MIN
I II MOD MIN CR AM 1) 2) 3)
<1/3 15 0 0 8 2 5 2 4 3
1/3–2/3a 14 4 0 15 2 1 5 5 4
>2/3b 1 1 1 3 0 0 1 0 2
Total 30 5 1 26 4 6 8 9 9

MOD, Mesio-occluso-distal; MIN, Metal inlay; CR, composite resin; AM, amalgam. Note the significant difference (P < 0.01) between a and b in the extending crack pattern in the MIN group. 1), to the middle part of dentin; 2), to the deep part of dentin; 3), to the pulp.