BMC Oral Health

Table 3 The mean and standard deviation (SD) values of the change in the canal curvature angles after shaping in both moderate and sever curvature groups, calculated on CBCT images

From: Root canal curvature as a prognostic factor influencing the diagnostic accuracy of radiographic working length determination and postoperative canal axis modification: an in vitro comparative study

	Moderate 10°–25°			Severe 26°–70°			P-value*
	N	Mean	SD	N	Mean	SD	P-value*
Before instrumentation	43	21.32	4.26	17	29.95	4.143	0.688**
After instrumentation	43	18.541	4.143	17	22.84	2.693	0.1**
Curvature change	43	-12.721	10.016	17	-23.202	10.131	0.691**

* Independent t test
** Not significant

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ISSN: 1472-6831

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