A Retrospective Review of Outcomes of Dental Treatment Performed for Special Needs Patients under General Anaesthesia: 2-Year Follow-Up

Table 2

Failures rates of different restorative procedures.

Restorative materials	Total number of restorations	Number of failed restorations	Failure rate (%)	Post hoc
Amalgam restorations	46	6	13.0	c
Composite restorations	611	139	22.7
Glass ionomer cement	39	4	10.2
Stainless steel crowns	289	11	3.8	e

Statistically significant at < 0.01; Pearson’s chi-square test.
Post hoc < 0.05, a = amalgam versus composite; b = amalgam versus GIC; c = amalgam versus SSC; d = composite versus GIC.
e = composite versus SSC; f = GIC versus SSC.