Table 1.

The estimated number of the metallic dental restorations per person

Age (years)	Mean number per person
Dental crowns
40–79	4.1
40–49	2.9
50–59	4.4
60–69	4.6
70–79	4.4
Dental bridges
40–79	1.3
40–49	0.5
50–59	1.3
60–69	1.8
70–79	1.7