Precision of Fit of Titanium and Cast Implant Frameworks Using a New Matching Formula

Table 8

Comparison of the best-fit results in μm for centroid vertical gaps generated by the fixed and unfixed coordinate system best-fit matching methods.

(a)

Centroid Z gap data base	Fixed cast	Unfixed cast	Fixed titan.	Unfixed titan.
1	12.1	5.8	3.2	2.0
2	31.7	19.3	8.7	4.4
3	12.8	12.8	3.9	3.8
4	29.9	17.2	8.6	4.8
5	18.5	12.1	4.4	3.0
6			1.9	1.5
7			2.1	1.2
8			0.9	0.9
9			1.3	0.9
10			2.3	1.9

(b) Descriptive statistics

	Count	Mean	Std. dev.	Std. error
Fixed cast	5	21.00	9.306	4.162
Unfixed cast	5	13.44	5.221	2.335
Fixed titan.	10	3.73	2.812	0.889
Unfixed titan.	10	2.44	1.462	0.462

(c) Paired 𝑡-test: hypothesized difference = 0

	Mean diff.	DF	t value	𝑃 value
Fixed cast; unfixed cast	7.56	4	3.225	0.0321
Fixed titan; unfixed titan.	1.29	9	2.671	0.0256