iDentistry The Journal September-December 2017 | Page 18

The Journal
Fig 11
Fig 9
13. Use of extraoral anchorage
Ÿ Standard edgewise technique recommends
11. Jigs for Distalization : An activated coil
spring is tied to a hook soldered on mesial
eyelet of the jig .The distal leg of jig exerts
distal forces on molar using direct skeletal
anchorage. (Fig: 10)
the use of extra oral forces (headgear) for
anchorage and tooth movement, that is still
commonly used today .
Ÿ J HOOK HEADGEAR: Intrusion and
retraction of upper incisors in patients with
vertical growth pattern can be achieved with J
hook headgear using extraoral anchorage. (Fig:
12)
Fig 10
Fig 12
12. Sliding jigs for space closure : Sliding jigs
are often used for separate canine retraction.
An open coil spring is placed between the jig
and canine bracket that is compressed by the
distal force acting on the jig. (Fig: 11)
17
Vol. 13 No. 3
Sep-Dec 2017