Table IV.

Summary of the tensile strengths measured using Tensile #1 for the 3D printed nasopharyngeal swabs before and after sterilization, for different sterilization protocols, and after aging.

	Pre-sterilization	Post-sterilization	After Aginga
Abiogenix FAST spiral	69 ± 2.2	AP#1: 67 ± 1.7 AP#2: 62 ± 2.7	AP#1: 65 ± 2.2 AP#2: 71 ± 2.8
Formlabs–USF	Not tested	AP#1: 106 ± 4.0 AP#2: 101 ± 2.8	AP#2: 122 ± 5.2
Formlabs–Northwell	94 ± 1.3	AP#1: 80 ± 2.3 AP#2: 66 ± 2.2	AP#1: 87 ± 5.3
EnvisionTEC	58 ± 2.5	AP#1: 51 ± 2.6 AP#1: 62 ± 5.0b	AP#1: 59 ± 4.4
Resolution Medical lattice	Not tested	AP#3: 50 ± 2.3 AP#3: 56 ± 4.7b	AP#3: 50 ± 3.0

Details on the Autoclave Protocols (AP) are summarized in Table II. All data are reported in Newtons. Bold font is used to indicate significant difference from pre-sterilized or unaged sterilized samples.

^aSwabs were aged for 7 days, except for Resolution Medical, which were aged 5 days.

^bSterilized by the manufacturer.