Failure rates of mini-implants placed in the infrazygomatic region

Progress in Orthodontics

Table 1 Failure rates by characteristics of patients

Characteristic		Total N	Failure rate (%)
Age	<18 years	29	20.69
Age	≥18 years	26	23.08
Gender	Male	13	38.46
Gender	Female	42	16.67
Presence of medical condition	Yes	6	50
Presence of medical condition	No	49	18.37
Lomas (Mondeal, Tuttligen, Germany)	Yes	43	18.60
Lomas (Mondeal, Tuttligen, Germany)	No	12	33.33
Diameter of implant	1.50 or 1.80	10	30
Diameter of implant	2.00 or 2.30	45	20
Length of implant	6 to 8 mm	13	30.77
Length of implant	9 mm	42	19.05
Force magnitude	150 g	12	16.67
Force magnitude	>150 g	43	23.26
Type of movement	Purely intrusive	25	16
Type of movement	All others	30	26.67
Oral hygiene	Poor	14	35.71
Oral hygiene	Good or fair	41	17.07
Operator experience	Experienced	11	18.18
Operator experience	Inexperienced	44	22.73
Use of pilot hole	Yes	22	13.64
Use of pilot hole	No	33	27.27
Side of implant	Left	28	25
Side of implant	Right	27	18.52