In Vitro Quantitative Evaluation of Postprocessing Filter for Metal Artifact Reduction in Cone Beam Computed Tomography Images of Titanium and Zirconium Dioxide Implants

Table 2

Comparison between filters/teeth for titanium and zirconium dioxide implant.

Titanium implant				Zirconium dioxide
Filter	Median	Result	SD	Filter	Median	Result	SD
41				41
BAR	7.4	C	0.1	BAR	6.7	D	0.3
Multi-CDT NR	8.4	B	0.1	Multi-CDT NR	7.6	C	0.0
2x	9.1	AB	0.2	2x	9.2	B	0.0
1x	9.2	AB	0.1	1x	9.3	B	0.2
Nonfiltered	9.5	A	0.2	Nonfiltered	9.8	A	0.1
43				43
BAR	5.7	D	0.0	BAR	7.4	D	0.1
Multi-CDT NR	6.0	CD	0.0	Multi-CDT NR	8.4	C	0.1
2x	6.3	BC	0.2	2x	9.1	B	0.1
1x	6.4	AB	0.3	1x	9.2	AB	0.0
Nonfiltered	6.7	A	0.0	Nonfiltered	9.5	A	0.0
44				44
BAR	6.7	B	0.0	BAR	7.2	C	0.1
Multi-CDT NR	7.6	B	0.1	Multi-CDT NR	8.4	B	0.2
2x	9.2	A	0.2	2x	8.9	A	0.2
Nonfiltered	9.3	A	0.1	Nonfiltered	9.1	A	0.0
1x	9.8	A	0.2	1x	9.2	A	0.2
46				46
BAR	5.1	D	0.1	BAR	6.6	C	0.2
Multi-CDT NR	5.9	C	0.1	Multi-CDT NR	7.2	B	0.1
2x	6.0	BC	0.2	2x	8.8	A	0.0
Nonfiltered	6.2	AB	0.1	1x	8.9	A	0.0
1x	6.4	A	0.3	Nonfiltered	9.1	A	0.2

Medians followed by the same letters do not differ significantly from each other.