Exploration of Medicine

Table 3

Mean amount of dentin removed from the mesial and distal canal walls in the two groups at different levels from the apex

Group		Mean (mm)	SD (mm)	T-test statistic	Df	P-value	Effect size (Cohen’s d)
Dentin removed from mesial wall at 3 mm	A1	0.1439	0.07370	0.522	60	0.604	–0.132
Dentin removed from mesial wall at 3 mm	C1 + A1	0.1323	0.09969	0.522	60	0.604	–0.132
Dentin removed from mesial wall at 5 mm	A1	0.1800	0.12204	0.435	60	0.665	–0.109
Dentin removed from mesial wall at 5 mm	C1 + A1	0.1668	0.11751	0.435	60	0.665	–0.109
Dentin removed from mesial wall at 7 mm	A1	0.2039	0.09996	–0.024	60	0.981	0.006
Dentin removed from mesial wall at 7 mm	C1 + A1	0.2045	0.10945	–0.024	60	0.981	0.006
Dentin removed from distal wall at 3 mm	A1	0.1255	0.15205	–0.464	60	0.644	0.118
Dentin removed from distal wall at 3 mm	C1 + A1	0.1432	0.14869	–0.464	60	0.644	0.118
Dentin removed from distal wall at 5 mm	A1	0.1355	0.12490	–1.051	60	0.298	0.267
Dentin removed from distal wall at 5 mm	C1 + A1	0.1700	0.13362	–1.051	60	0.298	0.267
Dentin removed from distal wall at 7 mm	A1	0.2181	0.12584	0.204	60	0.839	–0.053
Dentin removed from distal wall at 7 mm	C1 + A1	0.2119	0.10974	0.204	60	0.839	–0.053

SD: standard deviation; Df: degree of freedom