Table 4.

Numbers and failure rates of fixed retainers for the overall, upper, and lower teeth in the two groups tested.

Group	Composite	Splint Zone	Teeth Bonded	Failures	Percentage (%)	Significance
Group 1	Conventional	Overall	600	37	6.17
Group 2	Flowable	Overall	600	72	12.00	P < 0.05
Group 1	Conventional	Upper	300	16	5.33
Group 2	Flowable	Upper	300	32	10.67	P < 0.05
Group 1	Conventional	Lower	300	21	7.00
Group 2	Flowable	Lower	300	40	13.33	P < 0.05