Mastication Wear of Two Low Profile Attachment Systems for Overdenture: An In Vitro Study

Table 4

Results of the retention test performed with clear matrices.

(a)

		Test °	1	2	Difference between 1 and 2
		Matrix	0 cycles	400.000 cycles
Group	Attachment	Patrix	0 cycles	400.000 cycles
A	L				-38.62%
A	NL				-38.02%
B	L				-43.62%
B	NL				-41.20%

(b)

		Test °	3	4	Difference between 3 and 4
		Matrix	0 cycles	400.000 cycles
Group	Attachment	Patrix	400.000 cycles	800.000 cycles
A	L				-30.78%
A	NL				-31.84%
B	L				-60.19%
B	NL				-47.20%

(c)

		Test °	5	6	Difference between 5 and 6
		Matrix	0 cycles	400.000 cycles
Group	Attachment	Patrix	800.000 cycles	1.200.000 cycles
A	L				-23.54%
A	NL				-38.03%
B	L				-52.14%
B	NL				-43.47%

L: loaded side. NL: nonloaded side. All data, except for differences expressed as a percentage, are expressed in Newtons.