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- เผยแพร่เมื่อ 5 ก.ย. 2024
- This video is about the construction of self supported buccal canine retractor , this video consists of 16 parts means stepwise fabrication from straightening of wire to helix formation to passive adaptation
This exercise is a part of preclinical orthodontics and content source of the video are
Textbook of Orthodontics by " Gurkeerat Singh"
Orthodontics. The Art and Science "Dr. S.I. Bhalajhi".
Orthodontics: Principles and Practices by "Phulari Basavaraj Subhashchandra"
Parts of self supported buccal canine retractor
1. Active Arm
2. Helix
3. Retentive Arm
4. Retentive Tag
Wire used : 0.7mm/0.6 mm
• Indications:
a) Indicated when only distal movement of canine is required.
b) Minimal distal movement of canine is achieved with this
retractor
Design:
• One of the few appliances where coil is closed for activation.
• The end of the retractor is bent at right angle to the canine to be moved.
• Then it is shaped to the tooth.
• Coil is placed as high as possible without interfering with the soft tissues.
• Tag should cross over the mesial contact point of second premolar.
• Coil should be placed in between the present and future position of the
canine.
• If thinner wire is used, then they are sleeved to prevent distortion.
DESIGN & CONSTRUCTION
0.7mm wire used
Coil lies just distal to the long axis of the tooth
Mesial arm-active arm, should be away from the tissue surface & should run parallel to the long axis of the canine
At about the middle third of canine a right angled bend is given to the active arm & is adapted on the mesial side of the canine.
Distal arm-retentive arm, adapted to the mesial aspect of 2 PM
Great explanation 👌✨