Table 5.

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

Group	Composite	Splint Zone	Tooth	Teeth Bonded	Failures	Percentage (%)	Significance
Group 1	Conventional	Upper	Canines	100	2	2.00
Group 1	Conventional	Upper	Incisors	200	14	7.00	ns
Group 1	Conventional	Lower	Canines	100	4	4.00
Group 1	Conventional	Lower	Incisors	200	17	8.50	ns
Group 2	Flowable	Upper	Canines	100	7	7.00
Group 2	Flowable	Upper	Incisors	200	25	12.50	ns
Group 2	Flowable	Lower	Canines	100	9	9.00
Group 2	Flowable	Lower	Incisors	200	31	15.50	ns