Evaluate the efficiency of using copper nickel titanium (CuNiTi) arch wire on the initial stage of leveling and alignment regarding their rate of alignment in comparison to Conventional Nickel Titanium arch wire (NiTi) by Measuring the amount and rate of alignment achieved every 2 weeks for a period of 2 months.

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Leveling and alignment is the first stage in fixed orthodontic treatment, performed for every patient. Copper nickel titanium (CuNiTi) was modified from conventional nickel titanium (NiTi) to stabilize the super elasticity properties of the initial nickel titanium (NiTi) arch wire against cyclic deformation. The addition of copper to traditional nickel titanium enhances thermal reactive properties and consistency of forces.so the aim of the study is to Evaluate the efficiency of using copper nickel titanium (CuNiTi) arch wire on the initial stage of leveling and alignment regarding their rate of alignment.

Inclusion Criteria:

1. Adult patients aged (18~33).
2. Moderate crowding (4-8)10.
3. No extractions required.

Exclusion Criteria:

1. Previous orthodontic treatment.
2. Missing teeth other than the wisdoms.
3. Patient with dental anomalies.
4. Patient having a deep bite, open bite or cross bite.

i) To participant (subjects): Patients can be blinded as they do not know the type of wire used. ii) To Assessor: The assessor (different than the main operator) will carry out the measurements blindly on the pre and post models.