Table 2 Measures of central dispersion regarding the changes in weight (mg) and surface roughness (µm) of specimens after the attrition wear (n = 6)
From: In vitro attrition wear resistance of four types of paste-like bulk-fill composite resins
Type | Minimum | Maximum | Mean ± SD |
|---|---|---|---|
Z250 | |||
W. diff | − 8.00 | − 2.00 | − 4.3333 ± 2.422 |
Ra. diff | − 0.99 | 1.28 | 0.0480 ± 0.918 |
Rq. diff | − 1.09 | 1.57 | 0.1493 ± 1.146 |
Rz. diff | − 1.76 | 5.41 | 1.4027 ± 2.970 |
X-tra fila | |||
W. diff | − 7.00 | − 5.00 | − 6.1667 ± 0.983 |
Ra. diff | − 0.17 | 1.85 | 0.6245 ± 0.726 |
Rq. diff | − 0.38 | 1.57 | 0.3465 ± 0.780 |
Rz. diff | − 0.51 | 4.88 | 2.1058 ± 1.763 |
EverXb | |||
W. diff | − 4.00 | − 1.00 | − 2.5000 ± 1.048 |
Ra. diff | 0.18 | 1.08 | 0.5190 ± 0.329 |
Rq. diff | 0.09 | 1.00 | 0.6010 ± 0.329 |
Rz. diff | − 0.04 | 4.45 | 1.9712 ± 1.686 |
Filtek Bulk-Fillb | |||
W.diff | − 3.50 | − 1.40 | − 2.3833 ± 0.798 |
Ra. diff | − 0.10 | 2.49 | 1.3623 ± 0.919 |
Rq. diff | 0.19 | 2.22 | 1.3958 ± 0.753 |
Rz. diff | − 0.39 | 5.11 | 1.9093 ± 2.367 |
SonicFill 2 | |||
W. diff | − 8.00 | − 2.00 | − 3.5000 ± 2.345 |
Ra. diff | − 1.14 | 2.00 | 0.3855 ± 1.310 |
Rq. diff | − 2.32 | 2.26 | 0.3223 ± 1.781 |
Rz. diff | − 5.42 | 6.50 | 0.6483 ± 4.200 |