EFFECT OF LOW LEVEL LASER THERAPY ON ORTHODONTIC MINISCREW DISPLACEMENT

Miniscrews can achieve good anchorage for different types of tooth movements, as intrusion, retraction, and protraction. However, obtaining primary stability is a challenge in their clinical application.Low Level Laser Therapy is suggested to prevent miniscrew displacement. Also previous studies concluded that Low Level Laser Therapy has an effect in stabilizing miniscrew after direct application.

So the aim of this study is to assess the effect of Low Level Laser Therapy on displacement of miniscrews during canine retraction.

Inclusion Criteria:

• Patients aged 18 to 22 years old.
• Permanent dentition.
• Class I Bimaxillary protrusion and class II devision 1 patients.
• Good oral hygiene.

Exclusion Criteria:

• Medically compromised patients.
• Chronic renal failure and hormonal disorders as thyroid and parathyroid.
• Regular use of steroids, barbiturates, anticonvulsants drugs, and thyroid hormone replacements.
• Tobacco smoking.
• Any disease or metabolic disorder that can affect bone physiology