Table 1.

Test study design

Test	Impaction test description	Impact force (lbs)	Number of strikes	Sample size
1	Misaligned inserts (2–4 mm)	a) 1000	2	n = 5
		b) 2000	2
2	Deformed shells from 1-mm oblong underream	a) 1000	2	n = 5
		b) 2000	2
3	Taper with soft tissue impingement	a) 1000	2	n = 5
		b) 2000	2
4	Taper damage using a 0.25-mm diameter wire	a) 1000	2	n = 5
		b) 2000	2
5	Misaligned inserts (2–4 mm), deformed shells from 1-mm press-fit, taper damage using a 0.25-mm diameter wire	a) 1000	2	n = 5
		b) 2000	2
6	Misaligned inserts (2–4 mm)	a) 2000	10	n = 5 (from Test 1)
		b) 3000	10
		c) 4000	10
		d) 5000	10
7	Deformed shells from 1-mm oblong underream	a) 2000	10	n = 5 (from Test 2)
		b) 3000	10
		c) 4000	10
		d) 5000	10
8	Taper damage using a 0.25-mm diameter wire	a) 2000	10	n = 5 (from Test 4)
		b) 3000	10
		c) 4000	10
		d) 5000	10
9	Misaligned inserts (2–4 mm), deformed shells from 1-mm press-fit, taper damage using a 0.25-mm diameter wire	a) 2000	10	n = 5 (from Test 5)
		b) 3000	10
		c) 4000	10
		d) 5000	10