[Table/Fig-5]:

Data regarding file separation.

		Frequency	Percent
What is the estimated frequency of file separation in the root canal (after how many cases)	After 1	8	1.3
	After 10	50	7.8
	After 2	11	1.7
	After 3	7	1.1
	After 4	25	3.9
	After 5	89	13.9
	After 6	141	22.1
	After 7	33	5.2
	After 8	227	35.6
	After 9	19	3.0
	After more than 10	28	4.4
	Total	638	100.0
		Frequency	Percent
What is the estimated frequency of file separation ’ in root canal	In less than a week	14	2.2
	Less than five times a year	198	31.0
	Once in 15 days	84	13.2
	Once in a month	239	37.5
	Once in a week	33	5.2
	Rare	70	11.0
	Total	638	100.0
		Frequency	Percent
Do you think that the separation of file has decreased with your increasing experience on rotary file system	No	43	6.7
	Yes	595	93.3
	Total	638	100.0