Table 2.

Descriptive data of surface irregularities in the unworn state and following wear cycling

Essix-type retainer	Mean (μm)	± SD	Median (μm; p50)	IQR
Duran 1
Pre	211.19	80.40	205.80	69.80
Post	346.81	113.71	391.90	68.00
Duran 1.5
Pre	248.12	54.34	226.20	51.30
Post	308.47	99.95	357.60	187.00
Essix C
Pre	321.08	52.62	321.60	68.40
Post	413.88	79.45	423.35	26.90
Vivera
Pre	250.86	106.72	215.65	115.75
Post	324.66	71.67	332.25	69.30
Zendura
Pre	508.57	89.63	509.20	152.35
Post	652.89	121.06	657.95	205.95