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1. ‫الطبية‬ ‫التقنية‬ ‫كلية‬-‫مصراتة‬
I ‫األسنان‬ ‫تقويم‬ ‫تقنية‬
Orthodontics I
6
‫د‬.‫قندي‬ ‫أمحـمد‬ ‫فتحي‬

2. ‫لولب‬
Z Spring
Z

3. ‫مكوناته‬

4. Fabrication
X1 – X2: length of the spring.
Y: midline of the mesiodistal width.
Z-spring position in the 1/3 gingival part.

5. Fabrication
• Bend the first arm with a coil at one end of
the wire.
• The arm should be parallel to mesiodistal
axis of the tooth.
• Bend another coil with the same size and
diameter at the other end of the tooth width.
• The wire from the first to the second coil
should follow z flow.
• From the 2nd coil, bend the wire parallel to
the mesiodistal axis of the tooth.

6. • Anterior arm:
On top of coil.
Ends folded away from tissue.
Fabrication
• At the middle part of the tooth,
bend the arm towards the palate
at 90° angle.
• Z-spring position in the 1/3
gingival part.

7. ‫مصندق‬ ‫لولب‬ ‫مصندق‬ ‫غير‬ ‫لولب‬

8. Double Cantilever Spring

9. Recurved Z Spring