Temporary anchorage device usage: a survey among Swiss orthodontists

Progress in Orthodontics

Table 4 Descriptive statistics of the amount of the placement of different TADs

	Median	IQR	Percentiles		Minimum	Maximum
	Median	IQR	25th	75th	Minimum	Maximum
For all participants (n = 108)
Mini-screws	0.0	3.0	0.0	3.0	0	50
Palatal implants	0.0	1.0	0.0	1.0	0	10
Mini-plates	0.0	0.0	0.0	0.0	0	8
For participants who used mini-screws in their treatment concepts (n = 19)
Mini-screws	4.0	12.0	0.0	12.0	0	50
Palatal implants	0.0	0.0	0.0	0.0	0	6
Mini-plates	0.0	0.0	0.0	0.0	0	4
For participants who used palatal implants in their treatment concepts (n = 60)
Mini-screws	0.0	2.0	0.0	2.0	0	12
Palatal implants	1.0	2.0	0.0	2.0	0	10
Mini-plates	0.0	0.0	0.0	0.0	0	8
For participants who used mini-plates in their treatment concepts (n = 6)
Mini-screws	4.5	0.0	0.0	6.0	0	6
Palatal implants	0	0.0	0.0	0.0	0	0
Mini-plates	0.0	2.0	0.0	2.0	0	2

Data from general question section of how many skeletal anchorage devices have been placed approximately in February and March of 2012 by anchorage device type. The first group shows statistics for all participants. The following three groups show statistics of subgroups based on the TAD type used in the treatment plan of the current case.