Table 5.

Average duration (in years) of amalgam and composite restoration carried out in posterior teeth from 2003 to 2011 (data from 2011 belong to the first half of the year), at the Odontology Faculty of the Complutense University and of the V. Vera Dental Clinic and Surgery Center of Madrid.

Year	2003	2004	2005	2006	2007	2008	2009	2010	2011
Composite	8 years	9 years	9 years	9 years	10 years	10 years	10 years	11 years	11 years
Amalgam	14 years	14 years	14 years	15 years	15 years	15 years	15 years	16 years	16 years