The trial is aimed to investigate an orthodontic treatment with a new removable-part-time-wearing appliance, based on "High-Tech" technology.

The appliance should be wear only 12-14 hours a day, and is made of a single silicone aligner, made specifically for the patient, using 3-D screening technology of the patient's malocclusion. The aligner has a designed pathway "built-in" for the tooth to move, from the original position of the malocclusion to the "end point" - the correct position.

The force system, that is needed in order to generate tooth movement, is produced by tiny air-balloons which are incorporated in the aligner.

The study hypothesis is, that an orthodontic treatment can be done successfully with this part-time wearing appliance.

The appliance include:

• silicone aligner (made specifically for the patient.
• simple air pump to blow air in the tiny balloons.

The patient is guided to wear the appliance 12-14 hours a day, after filling air in the balloons, under the doctor's instructions.

Clinical examination for follow-up will be done every 4 weeks.

Inclusion Criteria:

• mild to moderate class I malocclusion
• good general health
• good oral hygiene

Exclusion Criteria:

• bad cooperation
• any mental or health problem
• severe class I malocclusion, class II or class III malocclusion