[Table/Fig-4]:

Data regarding re use of rotary file system.

		Frequency	Percent
How many times do you re use your rotary file system	2 uses	17	2.7
	3-5 uses	185	29.0
	5-10 uses	408	63.9
	More than 10 uses	22	3.4
	Single use	6	0.9
	Total	638	100.0
		Frequency	Percent
When do you discard rotary file system	After decrease in the cutting efficiency	171	26.8
	After repeated re use	352	55.2
	After the file separation	76	11.9
	After using in curved canal	39	6.1
	Total	638	100.0
		Frequency	Percent
How do you remember the number of times the files are used	Marking on files	366	57.4
	Recording on paper	195	30.6
	Removal of petals	41	6.4
	Others	36	5.6
	Total	638	100.0